DOCSLIB.ORG

Reactions of Iridium and Rhodium With

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Reactions of Iridium and Rhodium With REACTIONS OF IRIDIUM AND RHODIUM WITH ETHTLENEDIAMINETETRAACETIC ACID DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By HAROLD DALE McBRIDE, B. A., M. S. The Ohio State University 1958 Approved by 1/Vg-Ar-vq* *" Adviser Department of Chemistry ACKNOWLEDGMENTS The author expresses his sincere gratitude to Dr. William M. MacNevin for his enthusiastic encouragement and wise counsel during the course of this study. Acknowledgment is also made to the Department of Chemistry of the Ohio State University for financial aid in the form of assistantships and to the National Science Foundation for a Fellowship from June, 1957» to the completion of this work. ii DEDICATION Dedicated in memory of iry son, Gary. iii TABLE OF CONTENTS PAGE STATEMENT OF THE PROBLEM .................................... 1 INTRODUCTION............................................... 2 Theory of Coordination Compounds and Conplex Ions ............ 2 Chemistry of EDTA......................................... 7 EDTA, General Information and Properties .................. 7 Preparation of EDTA .............. 10 EDTA as a Chelating A g e n t ................................ 12 Preparation of EDTA Complexes............................. 17 EDTA in Oxidation-Reduction Reactions ................... 21 Analytical Uses of EDTA ............. 23 Chemistry of Platinum Group Metals ................ 26 Oxidation Potentials of Rhodium and I r idium ................ 26 Separations and Analyses of Platinum Group Metals .... 28 BACKGROUND OF THE P R O B L E M .................................. 30 EXPERIMENTAL................................................ 31+ Reactions of Iridium(IV) with E D T A .......................... 31+ Job’s Method Applied to Iridium(IV) and EDTA ............. 31+ Other Preliminary Studies . 35 Attempts to Prepare Iridium(IV)-EDTA Complex ................ 38 Titration of Iridium(IV)-EDTA Product . 1+3 Chromatographic Separation of the Product ................... 1+5 Reactions of Iridium(IV) with Na2H2Y ................... 1+6 iv V PAGE Reduction of Iridium(lV) with EDTA ........ U 8 Postulated Mechanism..................... 56 Additional Evidence for Mechanism ............. $8 D i s c u s s i o n ............................................. 59 Evidence for Rhodium(III)-EDTA Complex . 62 CONCLUSIONS ................................................ 66 BIBLIOGRAPHY................................................ 67 AUTOBIOGRAPHY ............................................. 70 LIST OF TABLES TABLE PAGE I, Directional Characteristics of Covalent Bonds .... 6 II. Solubilities (grams/lOO ml.) of EDTA and Sodium Salts in Water and pH of Aqueous Solutions ...... 9 III. Logarithms of Formation Constants of EDTA Complexes . 1 $ IV. Atomic Ratios of Elements Based on Elemental Analysis of Product . .............. 1*2 V. Atomic Ratios of the Elements Based on Elemental Analysis of Product Prepared from Solutions at pH 3-5 . 1*7 VI. Molar Ratio of Iridium(lV) : EDTA in the Presence of Excess Iridium(IV)................................ 51* vi LIST OF FIGURES FIGURE PAGE 1. Job's Method, for EDTA and Iridium(IV). ...... 36 2. Absorption Curves for I^IrCl^ and H 2lrCl6 Treated with E D T A .............................. 39 3* Absorption Curve for Product Isolated from Reaction of H 2lrCl6 and ED T A ........................ Uli 1*. Absorption Curves for H2lrCl6 and H3lrCl6 Formed by Electrolytic Reduction of H^IrClg ....... 1*9 5. Absorption Curves for IrCl£s Formed by Reduction of ^IrClg with EDTA and Hydroxylamine Hydrochloride . 5l 6. Dependence of Molar Ratio of Reactants on Moles Iridium(IV) : EDTA Reacting . 55 7. Absorption Curves for Rhodium(lIl)-EDTA Complex . 63 vii STATEMENT OF THE PROBLEM In 19$k Kriege'*' reported spectrophotometrie, complexometric, and ■*■0. H. Kriege, Ph.D. dissertation, Ohio State University (195>U). hydrolytic evidence for the formation of a complex of tetravalent irid­ ium with ethylenediaminetetraacetic acid in chloride solution. He found the complex to have the unusual composition of two moles of iridium to one mole of EDTA if EDTA was in large excess in the reaction mixture. There was also evidence for some 3sl complex when EDTA was not in large excess. Further work on these complexes, such as solution studies on the formulas of the complexes, their preparation, and determination of their stability constants, is indicated. Kriege found no evidence for a complex of trivalent rhodium with EDTA in chloride solution. If the chloride complex is too stable for the EDTA complex to form in chloride solution, it can be expected to form in the absence of chloride. It is proposed to prepare the EDTA complex by starting with rhodium in the form of its sulfate, since sul­ fate forms less stable complexes than chloride. 1 INTRODUCTION Theory of Coordination Compounds and Complex Ions In general, a coordination compound may be defined as the addition product of the combination of an electron donor and an electron accep­ tor, each capable of independent existence. The electron acceptor or the donor may be an atom, an ion, or a molecule. Compounds resulting from the combination are referred to as complex confounds or coordina­ tion confounds, and the resulting ions are complex ions. However, the above definition, which is based on the formation of a coordinate bond according to the theory of Sidgwick2 and Lowry,^ includes only a part 2N. V. Sidgwick, J. Chem. Soc., 123, 72$ (1923). •^T. M. Lowry, J. Soc. Chem. Ind., U2, 316 (1923). of the types generally included as complexes. Although chemists do not agree on a simple definition of complexes, the addition compounds includ­ ed as complexes have a wide range of bond types from electronic to cova­ lent, and they possess a wide variety of properties. Complexes were classified by Biltz^ according to stability. He ^W. Biltz, Z. anorg. Chem., l6U, 3U$ (1927). called those that undergo reversible dissociation normal complexes, and those that exhibit little or no reversible dissociation he called pene­ tration complexes. Whereas the term normal complex is associated mainly 2 3 with complexes whose bonding is of a loose nature possessing a high degree of ionic character* penetration complexes are those whose bond­ ing is essentially covalent* The classification is one of convenience rather than strict division* The modern theory of complexes had its beginning in 1893 when Alfred Werner^ published his theory explaining how it is possible for 5a . Werner, Z_. anorg* Chem,* 3 , 267 (1893)* species capable of existence as entities to combine to form molecular complexes* His theory involved the following ideas* Metals not only have principal, or primary, ionizable valencies, but also auxiliary, or secondary, valencies* The secondary valencies, which are non-ionizable, combine with a maximum fixed number of atoms in a first sphere* This coordination number is usually k or 6 and sometimes 2 or 8* Since they are directional, six secondary bonds would form a regular octahedron and four secondary bonds would form either a plane or a tetrahedron* Therefore, isomerism is possible* Whereas secondary valencies may be satisfied by anions or molecules, primary valencies are satisfied only by anions less firmly attached in a second sphere* In 1923 Sidgwick^ and Lowry? gave an electronic interpretation to V. Sidgwick, J. Chem* Soc.* 123 , 725 (1923). 7T. M. Lowry, J. Soc. Chem* Ind., 1*2, 316 (1923). k the Werner theory* They considered Werner's primary valencies to be the formation of electrovalent bonds by the transfer of electrons* His secondary valencies consisted of the formation of electron-pair bonds by the donation of electrons to the metal atom by the coordinating group. These are coordinate bonds which are indistinguishable from covalent bonds after they are formed, since the source of electrons in the electron-pair bond has no influence on the strength or direction of the bond* The idea of accumulating electrons on an electropositive metal atom required in the fomation of coordinate bonds is an inherent weak­ ness in their theory when it is applied to coordination compounds and complex ions* The hybridization of bond orbitals as set forth by Pauling® explains in a very satisfying way how these strong covalent, ®L. Pauling, "The Nature of the Chemical Bond," 2nd. ed., Cornell University Press, Ithaca, 19k0, Ch. III. directional bonds are fomed* If the three 2p orbitals and the s orbi­ tal of the tetravalent carbon atom were used individually to form bonds, there would be three mutually perpendicular bonds and another weaker one without any particular direction* However according to the quantum- mechanical treatment, if there is a linear combination of the s orbital with the three 2p orbitals, there could be formed four strong bonds of equal strength and directed toward the corners of a regular tetrahedron* This is consistent with the experimental facts* Also, d orbitals may be used in hybrid bonds to give a variety of arrangements according to Table I«? Whereas some of the possible bond types and corresponding % . Moeller, "Inorganic Chemistry," John Wiley & Sons, Inc*, Hew York, N. Y., 1952, p. 203. spatial arrangements are rare among complexes, others are quite common. It is seen, for example, that metals with a coordination number of 6 may form d^sp3 bonds arranged octahedrally about the metal atom* It is important that not all the bonds in complexes are covalent as the theory of hybridization of orbitals
Load more

Recommended publications
  • Package 'Ciaawconsensus'
    Package ‘CIAAWconsensus’ September 19, 2018 Type Package Title Isotope Ratio Meta-Analysis Version 1.3 Author Juris Meija and Antonio Possolo Maintainer Juris Meija <[email protected]> Description Calculation of consensus values for atomic weights, isotope amount ratios, and iso- topic abundances with the associated uncertainties using multivariate meta-regression ap- proach for consensus building. License Unlimited LazyData yes Imports mvtnorm, stringr, numDeriv, stats, Matrix NeedsCompilation no Repository CRAN Date/Publication 2018-09-19 13:30:12 UTC R topics documented: abundances2ratios . .2 at.weight . .3 ciaaw.mass.2003 . .4 ciaaw.mass.2012 . .5 ciaaw.mass.2016 . .6 iridium.data . .6 mmm ............................................7 normalize.ratios . .8 platinum.data . .9 Index 10 1 2 abundances2ratios abundances2ratios Isotope ratios of a chemical element from isotopic abundances Description This function calculates the isotope ratios of a chemical element from the given isotopic abundances and their uncertainties. The uncertainty evaluation is done using the propagation of uncertainty and the missing correlations between the isotopic abundances are reconstructed using Monte Carlo methods. Usage abundances2ratios(x, ux, ref=1, iterations=1e4) Arguments x A vector of isotopic abundances of an element ux Standard uncertainties of x ref Index to specify the desired reference isotope for isotope amount ratios iterations Number of iterations for isotopic abundance correlation mapping Details Situations are often encountered where isotopic abundances are reported but not the isotope ratios. In such cases we reconstruct the isotope ratios that are consistent with the abundances and their uncertainties. Given only the abundances and their uncertainties, for elements with four or more isotopes one cannot unambiguously infer the uncertainties of the ratios due to the unknown correla- tions between isotopic abundances.
    [Show full text]
  • Iridium Platinum Alloys
    Iridium Platinum Alloys A CRITICAL REVIEW OF THEIR CONSTITUTION AND PROPERTIES By A. s. Darling, Ph.D., A.M.1.Mech.E. Native crystals of iridium-platinum are Journal of Science, in 1860, remarked some- frequently found in association with platinum what incredulously: “The platinum makers of ores. These natural alloys, of rather variable Paris are manufacturing these alloys and composition, occur as grains, and sometimes contrary to the wishes of the discoverers are as small cubes with rounded edges. Although extracting higher prices for them than for the geographical distribution is fairly wide pure platinum”. the major deposits appear to be in the Urals. Prominent physicists were, at this period One such crystal, described in I940 by Masing, of the nineteenth century, devoting consider- Eckhardt and Kloiber (I) had a well-defined able effort to the problems involved in repre- two-phase micro-structure. senting their fundamental and derived units Synthetic alloys were produced at an early in concrete form. Iridium-platinum alloys date. Gaudin (z), who fused spheres of a came to fill a unique position in the scale 10per cent iridium-platinum alloy on hearths of substances capable of retaining indefin- of lime and magnesia, commented in 1838 itely their mass, form, and linear dimensions. upon the lustre, malleability and extreme In addition to their corrosion resistance corrosion resistance of the resultant product. and good mechanical properties they were Twenty years later, however, iridium was readily workable and of fairly high electrical still regarded as a troublesome impurity in resistance. No internal transformations were platinum, but the researches of Sainte-Claire recognised in those days and the alloys were Deville and Debray (3) did much to dispel established as materials par exceZZence for this illusion.
    [Show full text]
  • The Development of the Periodic Table and Its Consequences Citation: J
    Firenze University Press www.fupress.com/substantia The Development of the Periodic Table and its Consequences Citation: J. Emsley (2019) The Devel- opment of the Periodic Table and its Consequences. Substantia 3(2) Suppl. 5: 15-27. doi: 10.13128/Substantia-297 John Emsley Copyright: © 2019 J. Emsley. This is Alameda Lodge, 23a Alameda Road, Ampthill, MK45 2LA, UK an open access, peer-reviewed article E-mail: [email protected] published by Firenze University Press (http://www.fupress.com/substantia) and distributed under the terms of the Abstract. Chemistry is fortunate among the sciences in having an icon that is instant- Creative Commons Attribution License, ly recognisable around the world: the periodic table. The United Nations has deemed which permits unrestricted use, distri- 2019 to be the International Year of the Periodic Table, in commemoration of the 150th bution, and reproduction in any medi- anniversary of the first paper in which it appeared. That had been written by a Russian um, provided the original author and chemist, Dmitri Mendeleev, and was published in May 1869. Since then, there have source are credited. been many versions of the table, but one format has come to be the most widely used Data Availability Statement: All rel- and is to be seen everywhere. The route to this preferred form of the table makes an evant data are within the paper and its interesting story. Supporting Information files. Keywords. Periodic table, Mendeleev, Newlands, Deming, Seaborg. Competing Interests: The Author(s) declare(s) no conflict of interest. INTRODUCTION There are hundreds of periodic tables but the one that is widely repro- duced has the approval of the International Union of Pure and Applied Chemistry (IUPAC) and is shown in Fig.1.
    [Show full text]
  • In Presenting the Dissertation As a Partial Fulfillment of the Requirements for an Advanced Degree from the Georgia Institute Of
    In presenting the dissertation as a partial fulfillment of the requirements for an advanced degree from the Georgia Institute of Technology, I agree that the Library of the Institute shall make it available for inspection and circulation in accordance with its regulations governing materials of this type. I agree that permission to copy from, or to publish from, this dissertation may be granted by the professor under whose direction It was written, or, in his absence, by the Dean of the Graduate Division when such copying or publication is solely for scholarly purposes and does not involve potential financial gain. It is under­ stood that any copying from, or publication of, this dis­ sertation which involves potential financial gain will not be allowed without written permission. THE PHOTOMETRIC TITRATION AND EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NICKEL IN THE PRESENCE OF COBALT A THESIS Presented to The Faculty of the Graduate Division by Joe Allen Mann In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the School of Chemistry Georgia Institute of Technology April, 1969 THE PHOTOMETRIC TITRATION AND EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF NICKEL IN THE PRESENCE OF COBALT APPROVED: 1 / CHAIRMAN DATE APPROVED BY CHAIRMAN: iNI . M ii ACKNOWLEDGMENTS It is a pleasure to acknowledge my indebtedness to Dr. H. A, Flaschka for his guidance, inspiration,and friendship. His willingness to share his wide experience, vast knowledge, and keen insight has made an invaluable contribution to the accomplishment of this work and to the development of the author, Dr, Peter E.
    [Show full text]
  • The Separation and Determination of Osmium and Ruthenium
    Louisiana State University LSU Digital Commons LSU Historical Dissertations and Theses Graduate School 1969 The epS aration and Determination of Osmium and Ruthenium. Harry Edward Moseley Louisiana State University and Agricultural & Mechanical College Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_disstheses Recommended Citation Moseley, Harry Edward, "The eS paration and Determination of Osmium and Ruthenium." (1969). LSU Historical Dissertations and Theses. 1559. https://digitalcommons.lsu.edu/gradschool_disstheses/1559 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Historical Dissertations and Theses by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. ThU dissertation has been 69-17,123 microfilmsd exactly as received MOSELEY, Harry Edward, 1929- THE SEPARATION AND DETERMINATION OF OSMIUM AND RUTHENIUM. Louisiana State University and Agricultural and Mechanical College, PhJ>., 1969 Chemistry, analytical University Microfilms, Inc., Ann Arbor, Michigan THE SEPARATION AND DETERMINATION OF OSMIUM AND RUTHENIUM A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Department of Chemistry Harry Edward Moseley B.S., Lpuisiana State University, 1951 M.S., Louisiana State University, 1952 J anuary, 1969 ACKNOWLEDGMENTS Thanks are due to Dr. Eugene W. Berg under whose direction this work was performed, to Dr. A. D. Shendrikar for his help in the tracer studies, and to Mr. J. H. R. Streiffer for his help in writing the com­ puter program.
    [Show full text]
  • A History of Iridium OVERCOMING the DIFFICULTIES of MELTING and FABRICATION by L
    A History of Iridium OVERCOMING THE DIFFICULTIES OF MELTING AND FABRICATION By L. B. Hunt The Johnson Matthey Group The use in unmanned space craft of iridium to encapsulate the radio- isotope thermoelectric generators, where temperatures of up to 20OO0C have to be withstood over several years of operation, with possible impact velocities of 90 metres per second, has focused greater attention on the remarkable properties of this member of the platinum group of metals. But these same properties of very high melting point and great mechanical strength have been the cause of difficulties in its melting and fabrication over a long period of years. How these problems were tackled and eventually overcome is described in this article. One of the less well-known members of the For some fifty years after the discovery of platinum group, iridium possesses quite platinum in South America and the early remarkable chemical and physical properties. It investigations of its properties by a number of is not only the most resistant of all metals to English, French, German and Swedish scien- corrosion, insoluble in all mineral acids in- tists, it was not realised that the native platinum cluding aqua regia and unattacked by other they were examining also contained other molten metals or by silicates at high tem- elements. The first to recognise that a small in- peratures, but has a very high melting point soluble residue survived the dissolution of and is the only metal to maintain good native platinum in aqua regia was the French mechanical properties in air at temperatures chemist Joseph Louis Proust, working for a above 1600OC.Its great stability can be gauged time in Madrid under the patronage of King from its physical properties, outlined in the Carlos IV, but he failed to grasp that other Table.
    [Show full text]
  • NON-HAZARDOUS CHEMICALS May Be Disposed of Via Sanitary Sewer Or Solid Waste
    NON-HAZARDOUS CHEMICALS May Be Disposed Of Via Sanitary Sewer or Solid Waste (+)-A-TOCOPHEROL ACID SUCCINATE (+,-)-VERAPAMIL, HYDROCHLORIDE 1-AMINOANTHRAQUINONE 1-AMINO-1-CYCLOHEXANECARBOXYLIC ACID 1-BROMOOCTADECANE 1-CARBOXYNAPHTHALENE 1-DECENE 1-HYDROXYANTHRAQUINONE 1-METHYL-4-PHENYL-1,2,5,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 1-NONENE 1-TETRADECENE 1-THIO-B-D-GLUCOSE 1-TRIDECENE 1-UNDECENE 2-ACETAMIDO-1-AZIDO-1,2-DIDEOXY-B-D-GLYCOPYRANOSE 2-ACETAMIDOACRYLIC ACID 2-AMINO-4-CHLOROBENZOTHIAZOLE 2-AMINO-2-(HYDROXY METHYL)-1,3-PROPONEDIOL 2-AMINOBENZOTHIAZOLE 2-AMINOIMIDAZOLE 2-AMINO-5-METHYLBENZENESULFONIC ACID 2-AMINOPURINE 2-ANILINOETHANOL 2-BUTENE-1,4-DIOL 2-CHLOROBENZYLALCOHOL 2-DEOXYCYTIDINE 5-MONOPHOSPHATE 2-DEOXY-D-GLUCOSE 2-DEOXY-D-RIBOSE 2'-DEOXYURIDINE 2'-DEOXYURIDINE 5'-MONOPHOSPHATE 2-HYDROETHYL ACETATE 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID 2-METHYLFLUORENE 2-METHYL-2-THIOPSEUDOUREA SULFATE 2-MORPHOLINOETHANESULFONIC ACID 2-NAPHTHOIC ACID 2-OXYGLUTARIC ACID 2-PHENYLPROPIONIC ACID 2-PYRIDINEALDOXIME METHIODIDE 2-STEP CHEMISTRY STEP 1 PART D 2-STEP CHEMISTRY STEP 2 PART A 2-THIOLHISTIDINE 2-THIOPHENECARBOXYLIC ACID 2-THIOPHENECARBOXYLIC HYDRAZIDE 3-ACETYLINDOLE 3-AMINO-1,2,4-TRIAZINE 3-AMINO-L-TYROSINE DIHYDROCHLORIDE MONOHYDRATE 3-CARBETHOXY-2-PIPERIDONE 3-CHLOROCYCLOBUTANONE SOLUTION 3-CHLORO-2-NITROBENZOIC ACID 3-(DIETHYLAMINO)-7-[[P-(DIMETHYLAMINO)PHENYL]AZO]-5-PHENAZINIUM CHLORIDE 3-HYDROXYTROSINE 1 9/26/2005 NON-HAZARDOUS CHEMICALS May Be Disposed Of Via Sanitary Sewer or Solid Waste 3-HYDROXYTYRAMINE HYDROCHLORIDE 3-METHYL-1-PHENYL-2-PYRAZOLIN-5-ONE
    [Show full text]
  • P–V–T Equation of State of Iridium up to 80 Gpa and 3100 K
    crystals Article P–V–T Equation of State of Iridium Up to 80 GPa and 3100 K Simone Anzellini 1,* , Leonid Burakovsky 2, Robin Turnbull 3 , Enrico Bandiello 3 and Daniel Errandonea 3 1 Diamond Light Source Ltd., Harwell Science & Innovation Campus, Diamond House, Didcot OX11 0DE, UK 2 Los Alamos National Laboratory, Theoretical Divisions, Los Alamos, NM 87545, USA; [email protected] 3 Departamento de Física Aplicada-Instituto de Ciencia de Materiales, Matter at High Pressure (MALTA) Consolider Team, Universidad de Valencia, Edificio de Investigación, C/Dr. Moliner 50, Burjassot, 46100 Valencia, Spain; [email protected] (R.T.); [email protected] (E.B.); [email protected] (D.E.) * Correspondence: [email protected] Abstract: In the present study, the high-pressure high-temperature equation of the state of iridium has been determined through a combination of in situ synchrotron X-ray diffraction experiments using laser-heating diamond-anvil cells (up to 48 GPa and 3100 K) and density-functional theory calcula- tions (up to 80 GPa and 3000 K). The melting temperature of iridium at 40 GPa was also determined experimentally as being 4260 (200) K. The results obtained with the two different methods are fully consistent and agree with previous thermal expansion studies performed at ambient pressure. The resulting thermal equation of state can be described using a third-order Birch–Murnaghan formalism with a Berman thermal-expansion model. The present equation of the state of iridium can be used as a reliable primary pressure standard for static experiments up to 80 GPa and 3100 K.
    [Show full text]
  • The Radiochemistry of Iridium-- +- -:, G
    ———..————- !546.8 L472ra NAS-NS 3045 .c.8 THE RADIOCHEMISTRY OF IRIDIUM-- +- -:, G. W. Leddicotte ‘1 Oak Ridge National Laboratory Oak Ridge, Tennessee October 1961 .- .- .. --.—- ---- -. ---- -. —.-. .- ---- ---- --- .- .. .- .— .— –. —-. .— —- -- -—. I -.. - -.. I ..-.- . -. I .. .. .. -- 1.- REPORT selection aids Pinpointing R & D rej9G7t8for hdu.st~ Clearinghouse, Sprhgfleld, Va, 22151 GOVERNMENT-WIDE INDEX—SEMI-MONTHLY GUIDE TO FEDERAL SCIIZNTIYIC AND TECH- NICAL REPORTS. ANNUAL SUBSCRIPTION S22.00 ($27.50 FOREIGN MAILING). SINGLE COPY $3.00. U.S. GOVERNMENT RESEARCH AND DEVELOPMENT REPORTS_EMI-MONTHLY JOURNAL ANNOUNCING R&D REPORTS. ANNUAL SUBSCRIPTION 830.00 ($27A0 FOREIGN MAILING). SINGLE COPY $3.00. FAST ANNOUNCEMENT SERVICE—SUMMARIES OF SELIZCTED R&D REPORTS MAILED ❑ Y INDUSTRIAL CATEGORIES, SS.00 ANNUAL SUBSCRIPTION. WRITE FOR AN APPLICATION FORM. DOCUMENT PRICES~FFECTIVE JANUARY 1, 19s7 THE CLEARINGHOUSE CHANGED ITS PRICING POLICY FOR DOCUMENT SALES FROM A SLIDING PRICE SCALE BASED ON DOCUMENT SIZE TO A SINGLE PRICE FOR DOCUMENTS SOLD. THE NEW DOCUMENT PRICE FOR A PAPER COPY (HARD COPY - HC) DOCUMENT IS $3.00. THE NEW PRICE FOR A MICROFICHE (MFI COPY IS s.ss PER DOcuMENT. THEsE PRICES ALSO ApPLY TO DOCUMENTS ANNOUNCED PRIOR TO JANUARY 1, 1967. THE NEW UNIT PRICES ARE BELOW THE PREVIOUS AVERAGE PRICES OF DOCUMENTS SOLD BY THE CLEARINGHOUSE. EFFICIENCIES IN ORDER PROCESSING RESULTING FROM THE SINGLE PRICE POLICY MAKE THE LOWER AVERAGE PRICE POSSIBLE. THE CLEARINGHOUSE SEL15 COUPONS FOR THE PURCHASE OF DOCUMENTS WHICH SIMPLIFY ORDERING AND HANDLING ❑ Y BOTH THE CLEARINGHOUSE AND ITS CUSTOMERS, PERMITTING THE CLEARINGHOUSE TO GIVE FASTER SERVICE ON DOCUMENT REQUESTS. THE COUPON IS A TABULATING CARD WITH A FACE VALUE OF THE PURCHASE PRICE OF A CLEARINGHOUSE DOCUMENT (S3.00 FOR HC, $.SS FOR MF).
    [Show full text]
  • Lab Chemicals.Cdr
    KIMYA Lab Chemicals Product Catalogue PRODUCTS Ammonium iron(ıı)sulfate hexa. Ammonium monovanadat 100 gr 1-Naphthylamine for synthesis Ammonium oxalate monoh.ext.pu 2-Butanol for analysis Ammonium peroxidısulfate ex.pu 2-Butanol gr for analysis Ammonium peroxidısulfate ex.pu 2-Mercaptoethanol Ammonium standart Acetaldehyde for synthesis Ammonium sulfate Acetic acid %100 gr for analysis Ammonium sulfate Acetic acid %100 gr for analysis pls. Ammonium thiocyanate gr for Acetic acid %100 extra pure Ammonium thıocyanate sol.for Acetic acid %100 extra pure Amonnium heptamolybdate Acetic acid (glacial) 100% extra pure Amyl alcohol Aceton gr for analysis acs,iso,reag,ph eur Amyl alcohol (1-pentanol)for.. Aceton gr for analysis acs,iso,reag,ph eur Aniline gr for analysis Aceton extra pure ph eur bp,nf Anthrone for synthesis Aceton extra pure ph eurbp,nf Antimony icp standart traceable to srm Acetone suprasolv 2,5 lt Antimony(ııı)chloride Acetone for liquid chromotography Aquamerck iron fresh-sea wa.te Acetonitrile for gas chromotography Aquamerck total hardness test Acetonitrile hplc Aqumerck total hardness test Acetonitrile hypergrade Arsenic icp standart traceable Acetonitrile lichrosolv Arsenic standard sol.1000mg/l Acetylacetone for synthesıs Azomethine h gr for analysis Acrylamide for electrophoresıs Barbituric acıd for synthesis Acrylamide for synthesis Barbituric acıd gr Acrylamıde for synthesis Barium chloride dıhydrate gr for analysis acs,iso Adipic acid for synthesis Barium chloride dihdrate ex.pu Albumin fraction v bovine seru Barium
    [Show full text]
  • List of Lists
    United States Office of Solid Waste EPA 550-B-10-001 Environmental Protection and Emergency Response May 2010 Agency www.epa.gov/emergencies LIST OF LISTS Consolidated List of Chemicals Subject to the Emergency Planning and Community Right- To-Know Act (EPCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and Section 112(r) of the Clean Air Act • EPCRA Section 302 Extremely Hazardous Substances • CERCLA Hazardous Substances • EPCRA Section 313 Toxic Chemicals • CAA 112(r) Regulated Chemicals For Accidental Release Prevention Office of Emergency Management This page intentionally left blank. TABLE OF CONTENTS Page Introduction................................................................................................................................................ i List of Lists – Conslidated List of Chemicals (by CAS #) Subject to the Emergency Planning and Community Right-to-Know Act (EPCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and Section 112(r) of the Clean Air Act ................................................. 1 Appendix A: Alphabetical Listing of Consolidated List ..................................................................... A-1 Appendix B: Radionuclides Listed Under CERCLA .......................................................................... B-1 Appendix C: RCRA Waste Streams and Unlisted Hazardous Wastes................................................ C-1 This page intentionally left blank. LIST OF LISTS Consolidated List of Chemicals
    [Show full text]
  • Technical Method
    J Clin Pathol: first published as 10.1136/jcp.29.11.1038 on 1 November 1976. Downloaded from 1038 Technical method Technical method Simplified qualitative chemical the phosphate test: first add two drops of a 10%° ammonium hydroxide solution, one drop of 20 % analysis for urinary calculi nitric acid, and then two to three drops of the ammonium-molybdate reagent. Heating the J. KLEEBERG mixture will produce the characteristic yellow Research Department, Rothschild- UniversityHospital, colour ofammonium-molybdate-phosphate. Haifa, Israel The 'three glass slide' technique to be described here SLIDE II TEST FOR OXALATE is meant for qualitative stone analysis only and Two to three milligrams of stone powderismixedwith applies especially to small calculi. double the amount of resorcinol powder and 2 drops of concentrated sulphuric acid, and the mixture is Material and methods heated. The appearance of a deep blue (not green!) colour is proof of oxalate (Dorronsorro and Bi-distilled water; acetic acid 10%; hydrochloric Fernandez, cited by Higgins (1954)). If oxalate is acid 10%; nitric acid 20%; sulphuric acid conc; found, calcium must also be present. (Resorcinol and ammonium hydroxide solution 10%; sodium sulphuric acid produce coloured compounds with hydroxide solution 10 %; resorcinol powder; satura- dicarbonic acids (Feigl, 1956).) ted aqueous solution of ammonium-molybdate. Magneson reagent: 1 mg of nitro-phenyl-azo- SLIDE III TESTS FOR AMMONIA, CARBONATE, resorcinol is dissolved in 100 ml of 2-N-sodium MAGNESIUM AND CALCIUM hydroxide. (a) 2-3 mg of stone powder is moistened with 2 dropscopyright. of 10% hydrochloric acid, gently warmed, and SLIDE I TESTS FOR AMMONIUM URATE, URIC examined for bubbles with a magnifying glass: ACID, CYSTINE, XANTHINE, AND PHOSPHATE evidence ofcarbonate.
    [Show full text]