Atomic Spectroscopy
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Atomic and Molecular Laser-Induced Breakdown Spectroscopy of Selected Pharmaceuticals
Article Atomic and Molecular Laser-Induced Breakdown Spectroscopy of Selected Pharmaceuticals Pravin Kumar Tiwari 1,2, Nilesh Kumar Rai 3, Rohit Kumar 3, Christian G. Parigger 4 and Awadhesh Kumar Rai 2,* 1 Institute for Plasma Research, Gandhinagar, Gujarat-382428, India 2 Laser Spectroscopy Research Laboratory, Department of Physics, University of Allahabad, Prayagraj-211002, India 3 CMP Degree College, Department of Physics, University of Allahabad, Pragyagraj-211002, India 4 Physics and Astronomy Department, University of Tennessee, University of Tennessee Space Institute, Center for Laser Applications, 411 B.H. Goethert Parkway, Tullahoma, TN 37388-9700, USA * Correspondence: [email protected]; Tel.: +91-532-2460993 Received: 10 June 2019; Accepted: 10 July 2019; Published: 19 July 2019 Abstract: Laser-induced breakdown spectroscopy (LIBS) of pharmaceutical drugs that contain paracetamol was investigated in air and argon atmospheres. The characteristic neutral and ionic spectral lines of various elements and molecular signatures of CN violet and C2 Swan band systems were observed. The relative hardness of all drug samples was measured as well. Principal component analysis, a multivariate method, was applied in the data analysis for demarcation purposes of the drug samples. The CN violet and C2 Swan spectral radiances were investigated for evaluation of a possible correlation of the chemical and molecular structures of the pharmaceuticals. Complementary Raman and Fourier-transform-infrared spectroscopies were used to record the molecular spectra of the drug samples. The application of the above techniques for drug screening are important for the identification and mitigation of drugs that contain additives that may cause adverse side-effects. Keywords: paracetamol; laser-induced breakdown spectroscopy; cyanide; carbon swan bands; principal component analysis; Raman spectroscopy; Fourier-transform-infrared spectroscopy 1. -
Absorption Spectroscopy and Imaging from the Visible Through Mid-Infrared with 20 Nm Resolution
Absorption spectroscopy and imaging from the visible through mid-infrared with 20 nm resolution. Aaron M. Katzenmeyer,1 Glenn Holland,1 Kevin Kjoller2 and Andrea Centrone1* 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States. *E-mail: [email protected] 2Anasys Instruments, Inc., 325 Chapala Street, Santa Barbara, California 93101, United States. Abstract Absorption spectroscopy and mapping from visible through mid-IR wavelengths has been achieved with spatial resolution exceeding the limit imposed by diffraction, via the photothermal induced resonance technique. Correlated vibrational (chemical), and electronic properties are obtained simultaneously with topography with a wavelength-independent resolution of ≈ 20 nm using a single laboratory-scale instrument. This marks the highest resolution reported for PTIR, as determined by comparing height and PTIR images, and its first extension to near-IR and visible wavelengths. Light-matter interaction enables scientists to characterize materials and biological samples across a large range of energies. Visible (VIS) and near-infrared (NIR) light (from 400 nm to 2.5 µm) probes electronic transitions in materials [1], providing information regarding band gap, defects, and energy transfer which is crucial for the semiconductor and optoelectronic industries and for understanding processes such as photosynthesis. Mid-infrared (mid-IR) light (from 2.5 µm to 15 µm) probes vibrational transitions and provides rich chemical and structural information enabling materials identification [2]. Spectral maps can be obtained by coupling a light source and a spectrometer with an optical microscope [3]. However, light diffraction limits the lateral resolution achievable with conventional microscopic techniques to approximately half the wavelength of light [4]. -
Absorption Spectroscopy
World Bank & Government of The Netherlands funded Training module # WQ - 34 Absorption Spectroscopy New Delhi, February 2000 CSMRS Building, 4th Floor, Olof Palme Marg, Hauz Khas, DHV Consultants BV & DELFT HYDRAULICS New Delhi – 11 00 16 India Tel: 68 61 681 / 84 Fax: (+ 91 11) 68 61 685 with E-Mail: [email protected] HALCROW, TAHAL, CES, ORG & JPS Table of contents Page 1 Module context 2 2 Module profile 3 3 Session plan 4 4 Overhead/flipchart master 5 5 Evaluation sheets 22 6 Handout 24 7 Additional handout 29 8 Main text 31 Hydrology Project Training Module File: “ 34 Absorption Spectroscopy.doc” Version 06/11/02 Page 1 1. Module context This module introduces the principles of absorption spectroscopy and its applications in chemical analyses. Other related modules are listed below. While designing a training course, the relationship between this module and the others, would be maintained by keeping them close together in the syllabus and place them in a logical sequence. The actual selection of the topics and the depth of training would, of course, depend on the training needs of the participants, i.e. their knowledge level and skills performance upon the start of the course. No. Module title Code Objectives 1. Basic chemistry concepts WQ - 02 • Convert units from one to another • Discuss the basic concepts of quantitative chemistry • Report analytical results with the correct number of significant digits. 2. Basic aquatic chemistry WQ - 24 • Understand equilibrium chemistry and concepts ionisation constants. • Understand basis of pH and buffers • Calculate different types of alkalinity. -
Atomic Spectroscopy
Atomic Spectroscopy Reference Books: 1) Analytical Chemistry by Gary D. Christian 2) Principles of instrumental Analysis by Skoog, Holler, Crouch 3) Fundamentals of Analytical Chemistry by Skoog 4) Basic Concepts of analytical Chemistry by S. M. Khopkar We consider two types of optical atomic spectrometric methods that use similar techniques for sample introduction and atomization. The first is atomic absorption spectrometry (AAS), which for half a century has been the most widely used method for the determination of single elements in analytical samples. The second is atomic fluorescence spectrometry (AFS), which since the mid-1960s has been studied extensively. By contrast to the absorption method, atomic fluorescence has not gained widespread general use for routine elemental analysis. Thus, although several instrument makers have in recent years begun to offer special- purpose atomic fluorescence spectrometers, the vast majority of instruments are still of the atomic absorption type. Sample Atomization Techniques We first describe the two most common methods of sample atomization encountered in AAS and AFS, flame atomization, and electrothermal atomization. We then turn to three specialized atomization procedures used in both types of spectrometry. Flame Atomization In a flame atomizer, a solution of the sample is nebulized by a flow of gaseous oxidant, mixed with a gaseous fuel, and carried into a flame where atomization occurs. As shown in Figure, a complex set of interconnected processes then occur in the flame. The first step is desolvation, in which the solvent evaporates to produce a finely divided solid molecular aerosol. The aerosol is then volatilized to form gaseous molecules. Dissociation of most of these molecules produces an atomic gas. -
Raman Spectroscopy for In-Line Water Quality Monitoring — Instrumentation and Potential
Sensors 2014, 14, 17275-17303; doi:10.3390/s140917275 OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Review Raman Spectroscopy for In-Line Water Quality Monitoring — Instrumentation and Potential Zhiyun Li 1, M. Jamal Deen 1,2,4,*, Shiva Kumar 2 and P. Ravi Selvaganapathy 1,3 1 School of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4K1, Canada; E-Mails: [email protected] (Z.L.); [email protected] (P.R.S.) 2 Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1 Canada; E-Mail: [email protected] 3 Mechanical Engineering, McMaster University, Hamilton, ON L8S 4K1, Canada 4 Electronic and Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China * Author to whom correspondence should be addressed; E-Mail: [email protected] or [email protected]; Tel.: +1-905-525-9140 (ext. 27137); Fax: +1-905-521-2922. Received: 1 July 2014; in revised form: 7 September 2014 / Accepted: 9 September 2014 / Published: 16 September 2014 Abstract: Worldwide, the access to safe drinking water is a huge problem. In fact, the number of persons without safe drinking water is increasing, even though it is an essential ingredient for human health and development. The enormity of the problem also makes it a critical environmental and public health issue. Therefore, there is a critical need for easy-to-use, compact and sensitive techniques for water quality monitoring. Raman spectroscopy has been a very powerful technique to characterize chemical composition and has been applied to many areas, including chemistry, food, material science or pharmaceuticals. -
Basics of Plasma Spectroscopy
Home Search Collections Journals About Contact us My IOPscience Basics of plasma spectroscopy This content has been downloaded from IOPscience. Please scroll down to see the full text. 2006 Plasma Sources Sci. Technol. 15 S137 (http://iopscience.iop.org/0963-0252/15/4/S01) View the table of contents for this issue, or go to the journal homepage for more Download details: IP Address: 198.35.1.48 This content was downloaded on 20/06/2014 at 16:07 Please note that terms and conditions apply. INSTITUTE OF PHYSICS PUBLISHING PLASMA SOURCES SCIENCE AND TECHNOLOGY Plasma Sources Sci. Technol. 15 (2006) S137–S147 doi:10.1088/0963-0252/15/4/S01 Basics of plasma spectroscopy U Fantz Max-Planck-Institut fur¨ Plasmaphysik, EURATOM Association Boltzmannstr. 2, D-85748 Garching, Germany E-mail: [email protected] Received 11 November 2005, in final form 23 March 2006 Published 6 October 2006 Online at stacks.iop.org/PSST/15/S137 Abstract These lecture notes are intended to give an introductory course on plasma spectroscopy. Focusing on emission spectroscopy, the underlying principles of atomic and molecular spectroscopy in low temperature plasmas are explained. This includes choice of the proper equipment and the calibration procedure. Based on population models, the evaluation of spectra and their information content is described. Several common diagnostic methods are presented, ready for direct application by the reader, to obtain a multitude of plasma parameters by plasma spectroscopy. 1. Introduction spectroscopy for purposes of chemical analysis are described in [11–14]. Plasma spectroscopy is one of the most established and oldest diagnostic tools in astrophysics and plasma physics 2. -
Methods Employed in Optical Emission Spectroscopy Analysis: a Review
Ingeniería y Ciencia ISSN:1794-9165 | ISSN-e: 2256-4314 ing. cienc., vol. 11, no. 21, pp. 239–267, enero-junio. 2015. http://www.eafit.edu.co/ingciencia This article is licensed under a Creative Commons Attribution 4.0 By Methods Employed in Optical Emission Spectroscopy Analysis: a Review D. M. Devia 1, L. V. Rodriguez-Restrepo 2and E. Restrepo-Parra 3 Received: 15-06-2014 | Acepted: 25-09-2014 | Onlínea: 01-30-2015 PACS: 52.25.Dg, 31.15.V- doi:10.17230/ingciencia.11.21.12 Abstract In this work, different methods employed for the analysis of emission spec- tra are presented. The proposal is to calculate the excitation temperature (Texc), electronic temperature (Te) and electron density (ne) for several plasma techniques used in the growth of thin films. Some of these tech- niques include magnetron sputtering and arc discharges. Initially, some fundamental physical principles that support the Optical Emission Spec- troscopy (OES) technique are described; then, some rules to consider dur- ing the spectral analysis to avoid ambiguities are listed. Finally, some of the more frequently used spectroscopic methods for determining the phy- sical properties of plasma are described. Key words: OES; plasma parameters; elemental determination; line intensity; broadening; shifting 1 Universidad Tecnológica de Pereira, Pereira, Colombia, [email protected]. 2 Universidad Nacional de Colombia, Sede Manizales, Colombia, [email protected] . 3 Universidad Nacional de Colombia, Sede Manizales, Colombia [email protected]. Universidad EAFIT 239j Methods Employed in Optical Emission Spectroscopy Analysis: a Review Métodos empleados en el análisis de espectroscopía óptica de emisión: una revisión Resumen En este trabajo se presentan diferentes métodos empleados para el análisis de espectros ópticos de emisión. -
Atomic Spectroscopy 008044D 01 a Guide to Selecting The
PerkinElmer has been at the forefront of The Most Trusted inorganic analytical technology for over 50 years. With a comprehensive product Name in Elemental line that includes Flame AA systems, high-performance Graphite Furnace AA Analysis systems, flexible ICP-OES systems and the most powerful ICP-MS systems, we can provide the ideal solution no matter what the specifics of your application. We understand the unique and varied needs of the customers and markets we serve. And we provide integrated solutions that streamline and simplify the entire process from sample handling and analysis to the communication of test results. With tens of thousands of installations worldwide, PerkinElmer systems are performing WORLD LEADER IN inorganic analyses every hour of every day. Behind that extensive network of products stands the industry’s largest and most-responsive technical service and support staff. Factory-trained and located in 150 countries, they have earned a reputation for consistently AA, ICP-OES delivering the highest levels of personalized, responsive service in the industry. AND ICP-MS PerkinElmer, Inc. 940 Winter Street Waltham, MA 02451 USA P: (800) 762-4000 or (+1) 203-925-4602 www.perkinelmer.com For a complete listing of our global offices, visit www.perkinelmer.com/ContactUs Copyright ©2008-2013, PerkinElmer, Inc. All rights reserved. PerkinElmer® is a registered trademark of PerkinElmer, Inc. All other trademarks are the property of their respective owners. Atomic Spectroscopy 008044D_01 A Guide to Selecting the Appropriate -
Prospects in Analytical Atomic Spectrometry
Russian Chemical Reviews 75 $4) 289 ± 302 $2006) Prospects in analytical atomic spectrometry AABol'shakov, AAGaneev, V M Nemets Contents I. Introduction 289 II. Atomic absorption spectrometry 290 III. Atomic emission spectrometry 292 IV. Atomic mass spectrometry 293 V. Atomic fluorescence spectrometry 295 VI. Atomic ionisation spectrometry 296 VII. Sample preparation and introduction, atomisation and data processing 298 VIII. Conclusion 298 Abstract. The trends in the development of five main branches of processing $averaging) of noise and enhances the analysis accu- atomic spectrometry, viz., absorption, emission, mass, fluores- racy due to the use of correlation models and neural network cence and ionisation spectrometry, are analysed. The advantages algorithms. and drawbacks of various techniques in atomic spectrometry are The development of analytical spectrometry and detection considered. Emphasised are the applications of analytical plasma- techniques is stimulated by the diverse and increasing demands in and laser-based methods. The problems and prospects in the industry, medicine, science, environmental control, forensic ana- development in respective fields of analytical instrumentation lysis, etc. The development of portable analysers for the determi- are discussed. The bibliography includes 279 references.references. nation of elements in different media at the immediate point of sampling, which eliminates the stages of collecting, transportation I. Introduction and storage of samples, is one of the most important directions. It should be noted that the development of atomic spectro- Analytical atomic spectrometry embraces a multitude of techni- metry slowed down in recent years; particularly, a trend towards a ques of elemental analysis that are based on the decomposition of decreasing number of scientific publications occurred. -
Atomic Absorption Spectroscopy
ATOMIC ABSORPTION SPECTROSCOPY Edited by Muhammad Akhyar Farrukh Atomic Absorption Spectroscopy Edited by Muhammad Akhyar Farrukh Published by InTech Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2011 InTech All chapters are Open Access distributed under the Creative Commons Attribution 3.0 license, which allows users to download, copy and build upon published articles even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the work must explicitly identify the original source. As for readers, this license allows users to download, copy and build upon published chapters even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. Notice Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book. Publishing Process Manager Anja Filipovic Technical Editor Teodora Smiljanic Cover Designer InTech Design Team Image Copyright kjpargeter, 2011. DepositPhotos First published January, 2012 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from [email protected] Atomic Absorption Spectroscopy, Edited by Muhammad Akhyar Farrukh p. -
Femtosecond Transient Absorption Spectroscopy – Technical Improvements and Applications to Ultrafast Molecular Phenomena
Femtosecond Transient Absorption Spectroscopy – Technical Improvements and Applications to Ultrafast Molecular Phenomena Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades der Julius-Maximilians-Universitat¨ Wurzburg¨ vorgelegt von Florian Kanal aus Kirchheim unter Teck Wurzburg¨ 2015 Eingereicht bei der Fakultat¨ fur¨ Chemie und Pharmazie am Gutachter der schriftlichen Arbeit 1. Gutachter: Prof. Dr. T. Brixner 2. Gutachter: Prufer¨ des offentlichen¨ Promotionskolloquiums 1. Prufer:¨ Prof. Dr. T. Brixner 2. Prufer:¨ 3. Prufer:¨ Datum des offentlichen¨ Promotionskolloquiums: Doktorurkunde ausgehandigt¨ am List of Publications [1] D. Reitzenstein, T. Quast, F. Kanal, M. Kullmann, S. Ruetzel, M. S. Hammer, C. Deibel, V. Dyakonov, T. Brixner, and C. Lambert, Synthesis and Electron Transfer Characteristics of a Neutral, Low-Band-Gap, Mixed- Valence Polyradical, Chem. Mater. 22, 6641–6655 (2010). [2] P. Rudolf, F. Kanal, J. Knorr, C. Nagel, J. Niesel, T. Brixner, U. Schatzschneider, and P. Nuernberger, Ultrafast Photochemistry of a Manganese-Tricarbonyl CO-Releasing Molecule (CORM) in Aqueous Solution, J. Phys. Chem. Lett. 4, 596–602 (2013). [3] P. Rudolf, F. Kanal, D. Gehrig, J. Niesel, T. Brixner, U. Schatzschneider, and P. Nuernberger, Femtosecond Mid-Infrared Study of the Aqueous Solution Photochemistry of a CO- Releasing Molecule (CORM), EPJ Web of Conferences 41, 05004 (2013). [4] F. Kanal, S. Keiber, R. Eck, and T. Brixner, 100-kHz Shot-to-Shot Broadband Data Acquisition for High-Repetition-Rate Pump– Probe Spectroscopy, Opt. Express 22, 16965–16975 (2014). [5] F. Kanal, S. Ruetzel, H. Lu, M. Moos, M. Holzapfel, T. Brixner, and C. Lambert, Measuring Charge-Separation via Oligomer Length Variation, J. Phys. Chem. C 118, 23586–23598 (2014). -
Atomic Spectroscopy Atomic Spectra
Atomic Spectroscopy Atomic Spectra • energy Electron excitation n = 1 ∆E – The excitation can occur at n = 2 different degrees n = 3, etc. • low E tends to excite the outmost e-’s first • when excited with a high E (photon of high v) an e- can jump more than one levels - 4f • even higher E can tear inner e ’s 4d n=4 away from nuclei 4p 3d - – An e at its excited state is not stable and tends to 4s return its ground state n=3 3p - – If an e jumped more than one energy levels because 3s of absorption of a high E, the process of the e- Energy n=2 2p returning to its ground state may take several steps, - 2s i.e. to the nearest low energy level first then down to n=1 next … 1s Atomic Spectra • Atomic spectra energy – The level and quantities of energy n = 1 - ∆E supplied to excite e ’s can be measured n = 2 & studied in terms of the frequency and n = 3, the intensity of an e.m.r. - the etc. absorption spectroscopy – The level and quantities of energy emitted by excited e-’s, as they return to their ground state, can be measured & studied by means of the emission spectroscopy 4f – The level & quantities of energy 4d n=4 absorbed or emitted (v & intensity of 4p e.m.r.) are specific for a substance 3d 4s n=3 3p 3s – Atomic spectra are mostly in UV Energy (sometime in visible) regions n=2 2p 2s n=1 1s Atomic spectroscopy • Atomic emission – Zero background (noise) • Atomic absorption – Bright background (noise) – Measure intensity change – More signal than emission – Trace detection Signal is proportional top number of atoms AES - low noise (background) AAS - high signal The energy gap for emission is exactly the same as for absorption.