Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Non-Purgeable Volatile Organic Compounds Rapidly Determined by Gas Chromatography/Mass Spectrometry Using Direct Aqueous Injection.
Author Pyle, S. M. ; Marcus, A. B. ; Johnson, L. S. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher Feb 95
Year Published 1995
Report Number EPA/600/A-95/056;
Stock Number PB95-218871
Additional Subjects Water pollution monitoring ; Gas chromotography ; Volatile organic compounds ; Sampling ; Hazardous materials ; VOC(Volatile Organic Compounds) ; DAI(Direct Aqueous Injection)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB95-218871 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/02/1995
Collation 7p
A direct aqueous injection (DAI) method was developed for the determination of 18 non-purgeable volatile organic compounds of which nine have no EPA-approved method. These polar liquids were spiked into distilled water at 1- to 100-ppm levels and analyzed in triplicate at seven concentration levels using a fused-silica capillary column interfaced to an ion trap MS. Using internal standardization, the relative response factors and relative retention times for the 18 compounds were determined. Duplicate data were collected using on-column and splitless injectors. Accuracy and method detection limits (MDLs) were calculated from 10 replicate injections of 2-ppm standards. For splitless injection, the average relative standard deviation for the compounds was 19% and the average MDL was 88 ppb; for on-column injection, the relative values were 13% and 800 ppb. Agreement with EPA-established criteria for 4-bromofluorobenzene will also be shown. Data from the EMSL-LV Analytical Sciences Division are presented to show conditions and limitations involving method parameters, such as column type, injection volume, and spectral quality.