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RECORD NUMBER: 24 OF 33

Main Title Measurement of mass spectra for the EPA toxic substances data base /
Author Keith, Lawrence H.,
CORP Author Radian Corp., Austin, TX.;Environmental Monitoring and Support Lab.-Cincinnati, OH.
Publisher Radian Corp. ; Reproduced by National Technical Information Service,
Year Published 1983
Report Number EPA/600/4-83-036; PB83255844
Stock Number PB83-255844
OCLC Number 10418783
Subjects Mass spectrometry. ; Poisons--Analysis.
Additional Subjects Mass spectroscopy ; Chemical analysis ; Contaminants ; Environmental surveys ; Purification ; Distillation ; Gas chromatography ; Quality control ; Toxic substances data base ; Thin layer chromatography
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EKCD  EPA/600/4-83-036 CEMM/GEMMD Library/Gulf Breeze,FL 07/25/2018
NTIS  PB83-255844 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 25 pages : illustrations
Abstract A total of 3024 compounds were procured to measure high quality mass spectra for inclusion in the NIH/EPA mass spectral data base. Compounds were assayed for purity before mass spectra were measured and, when necessary, were purified by thin-layer chromatography, recrystallization, sublimation, or distillation. Compounds that were sufficiently volatile to be amenable to gas chromatography (GC) and were less than 99% pure were introduced by GC. Quality control procedures included the use of decafluorotriphenylphosphine (DFTPP) for the molecular leak and GC inlets and cholesterol for the direct insertion probe inlet. Spectra of these standards were required to meet stringent acceptance criteria every four hours of instrument operation. High quality mass spectra were measured for 2000 of the 3024 compounds procured.
Notes "July 1983." Prepared for: Environmental Monitoring and Support Laboratory, U.S. Environmental Protection Agency Contract Number: 68-03-2879 Final report. Microfiche.
Place Published Austin, Tex. Springfield, Va.
Corporate Au Added Ent Environmental Monitoring and Support Laboratory (Cincinnati, Ohio); Radian Corporation.
Alternate Title Measurement of mass spectra for the Environmental Protection Agency toxic substances data base
PUB Date Free Form 1983
BIB Level m
Medium microform
Content text
Carrier microfiche
Cataloging Source OCLC/T
OCLC Time Stamp 20180718084247
Language eng
Origin OCLC
Type MERGE
OCLC Rec Leader 01732cam 2200409Ka 45010