Acronymsin Mass Spectrometry e have previously published (Spectroscopy, 17(2), 54 where. If your favorite acronym or abbreviation is missing (2002)) a list of common acronyms in mass spec- from the list, please feel free to contact the author. Wtrometry, reflecting the need for elucidation of short- hand terms used by mass spectrometrists to describe particular A Anion experiments or applications. It might be tempting to relegate the ACMS Asilomar Conference on Mass Spectrometry usefulness of such lists to newcomers, or to the uninitiated, but ADC Analog-to-digital converter this is unwise for an analytical endeavor that expands and ADO Average dipole orientation evolves as quickly as does mass spectrometry. As the field grows, AE Appearance energy the practitioners in one sub-discipline invariably become more AEI Associated Electric Industries, a past MS manufacturer isolated from their colleagues in another area of application. An AGC Automatic gain control environmental mass spectrometrist is comfortable with assess- AGHIS All-glass-heated-inlet system ment of results from a SIM GC–MS BTEX analysis. A carbohy- AMS Accelerator mass spectrometry drate mass spectrometrist will feel more at home with data orig- amu atomic mass unit inating in a PSD MALDI TOF experiment using DHB; different AN Auger neutralization folks like different ROOMS. ANP 2-amino-5-nitropyridine, a MALDI matrix Most of the acronyms in this compilation find common use in the literature and at professional meetings. Some ANZSMS Australia and New Zealand Society for acronyms in common use are protected trademarks (past, Mass Spectrometry present, or future), and precautions should be exercised in R. A. J. O’Hair, Eur. J. Mass Spectrom., 9(6), 525 (2003) A brief historical vignette of ANZSMS is found in this article, their appearance in the literature. Inclusion of an acronym along with perhaps the only musical selection published in a in this list is explicitly not an endorsement for its use, espe- mass spectrometry journal. The location of perhaps the only cially when there may be a “competitive” acronym available. poem published in a mass spectrometry journal shall remain Let the nomenclators make their judgments; in this compila- the author’s personal secret. tion, errors will fall on the side of unabashed inclusion, and a few “symbols” will sneak in as well. Particular attention has AP Appearance potential been given to acronyms introduced to the field of mass spec- APCI Atmospheric pressure chemical ionization trometry within the past few years. For recent additions to API Atmospheric pressure ionization the acronym list, a short description is provided, along with ARMS Angle-resolved mass spectrometry a recent (and not necessarily the first) reference. ASGDIMS Atmospheric-sampling glow discharge Acronyms are listed in alphabetical order. Most acronyms ionization mass spectrometry are composed of upper-case letters, but a few are traditionally ASMS American Society for Mass Spectrometry given as sequences of lower-case letters, or a mixture, to the ASTM American Society for Testing and Materials consternation of spell checkers in word processors every- ATT 6-aza-2-thiothymine, a MALDI matrix AVS Accelerating-voltage scan American Vacuum Society Kenneth L. Busch made a first and b impact parameter last effort at immortalization through B Magnetic sector mass analyzer, magnetic field acronym generation within his disserta- Magnetic sector field strength or flux density tion. There, he used the acronym MENIMS BAT Best anode temperature for methane-enhanced negative ion mass BDE spectrometry. Since then, he has sagely Bond dissociation energy Eur. J. Mass Spectrom., demurred from CAD/CID and FAB/LSIMS P. Armentrou, 9(6), 531 (2003) nomenclature imbroglios, since he is truly The kinetic energy dependence of reactions between mass- only a SCC (simple country chemist). The contents of this article selected ions and neutral molecules is interpreted to provide represent the views of the author and not those of the National the threshold for the process, revealing basic thermochemical Science Foundation (NSF). He can be reached at: information, such as the bond dissociation energy for [email protected]. intriguing metal-containing species. 40 Current Trends In Mass Spectrometry 19(5S) May 2004 www.spectroscopyonline.com its applicability in determination of the DCTB trans-2-[3-{4-tert- B/E Linked scan for product ions butylphenyl}-2-methyl-2- in MS-MS charge state distribution for folded pro- propenylidene]malononitrile, B2E Linked scan for parent ions teins in the gas phase. a MALDI matrix in MS-MS CE Charge exchange DE Delayed extraction BEoQ A reverse geometry sector Capillary electrophoresis DEI Desorption (or direct) instrument followed by an CEC Consolidated Electric electron ionization octupole collision cell Corporation (a former DF Double focusing followed by a quadrupole MS manufacturer) DFTPP Decafluorotriphenylphosphine mass filter CEMA Channel electron-multiplier DHB 2,5-dihydroxybenzoic acid, a BEqQ A reverse geometry sector array MALDI matrix instrument followed by a cf ConFlatTM DI Desorption ionization collision quadrupole CFFAB Continuous-flow fast DIN Direct injection nebulizer followed by a quadrupole atom bombardment DIOSMS Desorption ionization on mass filter CFP Continuous flow probe silicon mass spectrometry BEMS Biomedical and Environ- CHCA Cyano-4-hydroxycinnamic DIP Direct-insertion probe mental Mass Spectrometry acid, a MALDI matrix DLI Direct liquid introduction (a former MS journal) CI Chemical ionization DLV Direct laser vaporization BET Best emitter temperature CID Collision-induced DP Direct probe BIAMSTM Biomolecular interaction dissociation Diffusion pump analysis mass spectrometry CIDI Collisionally induced DS Data system dissociative ionization DTIMS Drift-tube ion mobility D. Nedelkov and R. W. Nelson, J. Molec. CIT cylindrical ion trap spectrometry Recogn., 16, 15 (2003) CM Center-of-mass In this combined technique, a surface CNL Constant neutral loss E Energy, Electric sector plasmon resonance sensor first is used to CODA Component detection mass analyzer characterize an analyte bound to an affin- algorithm Electric sector voltage ity labeled surface. Then, MALDI matrix COM Center-of-mass EA Electron affinity is added, the analyte is desorbed and ion- EAD Electron avalanche ized, and the MALDI mass spectrum is COMSPARI Comparison of spectral desorption used to characterize the surface species. retention information ECD Electron-capture dissociation J. E. Katz, D. S. Dumlao, S. Clarke, and J. ECID Electron-capture-induced BIRD Blackbody infrared Hau, J. Amer. Soc. Mass Spectrom., 15(4), dissociation radiative dissociation 580 (2004) ECMS Electron-capture mass BMS Biomedical mass COMSPARI is a collection of data visu- spectrometry spectrometry, biological alization software that allows the ana- ECNCI Electron-capture negative mass spectrometry lyst to detect small differences in com- chemical ionization BTEX Benzene, toluene, plex datasets, including GC–MS and ECNI Electron capture ethylbenzene, and xylene negative ionization LC–MS data. Perceptive differences in ECP Emitter-current programmer C Cation mirrored displays are key to highlight- EDD Energy distribution CA Collisional activation ing spectral differences. difference CAD Collisionally activated EE Even-electron ion CREMS Charge-reduction electro- decomposition EED Electron excitation spray mass spectrometry CAF Chemically assisted dissociation CS Charge stripping fragmentation EHI Electrohydrodynamic CV Compensation voltage CCA alpha-cyano-4-hydroxy ionization CX Charge exchange cinnamic acid, a MALDI matrix EI Electron ionization CZE–MS Capillary zone electrophore- CDEM Continuous-dynode (or impact) sis mass spectrometry electron multiplier EIEIO Electron-induced excitation of ions from organics D Disproportionation factor CDNT Conformation-dependent EIS External ion source Deuterium neutralization theory EJMS European Journal of Mass Da Daltons V. J. Nesatyy and M .J.-F. Suter, J. Mass Spectrometry DAC Digital-to-analog converter Spectrom., 39, 93 (2004) EM Electron multiplier DADI Direct analysis of Mass spectrometry now deals with high EMP Electron multiplier daughter ions molecular mass, highly charged ions of EOID Electro-optical ion detector DB Database complex structures. The reactions and ERMS Energy-resolved mass dbe Double-bond equivalent spectrometry structures of these ions is a matter of DCI Desorption (or direct) ES Electrospray or electrospray experimental interrogation as well as chemical ionization ionization theoretical modeling. The authors dis- DCT Double charge transfer cuss the CDNT theory in this paper and ESA Electrostatic analyzer May 2004 19(5S) Current Trends In Mass Spectrometry 41 Acronyms in Mass Spectrometry ESCi Combined electrospray HABA 2-(4-hydroxyphenylazo) IE Ionization energy, and atmospheric pressure benzoic acid, a MALDI matrix ionizing energy ionization source 4-HBSA 4-hydroxybenzenesulfonic Ion evaporation ESI Electrospray ionization acid, an LSIMS matrix IELC Ion exchange liquid ESP Electrospray ionization HCCA alpha-cyano-4-hydroxycin- chromatography ESPI Electrospray ionization namic acid, a MALDI matrix IJMSIP International Journal of esu electrostatic unit HCD Heated capillary dissociation Mass Spectrometry and Ion ETV Electrothermal vaporization HCP Hollow cathode plume Physics (Volumes 1-62) eV electron volt HDX Hydrogen/deuterium International Journal of exchange Mass Spectrometry and Ion FA Flowing afterglow