Record Display for the EPA National Library Catalog

RECORD NUMBER: 24 OF 35

OLS Field Name OLS Field Data
Main Title Measurement of Mass Spectra for the EPA (Environmental Protection Agency) Toxic Substances Data Base.
Author Keith, Lawrence H. ;
CORP Author Radian Corp., Austin, TX.;Environmental Monitoring and Support Lab.-Cincinnati, OH.
Year Published 1983
Report Number EPA-68-03-2879; EPA/600/4-83-036;
Stock Number PB83-255844
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
NTIS  PB83-255844 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 35p
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.