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Recovery of some common solvents from protective clothing breakthrough indicator pads by microwave-solvent extraction and gas chromatography.

Authors
Vo-E; Berardinelli-SP; Hall-RC
Source
Analyst 1999 Jun; 124(6):941-944
NIOSHTIC No.
20025247
Abstract
The efficiency of solvent adsorption using Permea-Tec general solvent pads, used for the detection of chemical breakthrough of protective clothing, was determined for methanol, acetone, ethyl methyl ketone, trichloroethylene (TriCE), tetrachloroethylene (TetCE), toluene, m-xylene, and D-limonene. Known volumes of single or mixed solvents were added to pads in the range 0.2-5.0 microliters (0.16-8.13 micrograms). After microwave-solvent extraction (ME) into hexan-1-ol, the samples (0.5-3.0 microliters) of the filtered and extracted solutions were analyzed by gas chromatography. All solvents exhibited > 97% adsorption on the pads at spiking levels of 0.48-0.98 microgram for each solvent. The solvent recovery for the system was calculated for each solvent, with solvents with boiling points below 110 degrees C showing recoveries of > 90%, and with solvents with boiling points above 110 degrees C showing recoveries from 80 to 90%. The recovery precision was good (RSD < or = 4%) for all solvents over the range 1.0-2.5 microliters of applied solvents to pads for ME and 1.0 microliter of extracted solutions for GC analysis.
Keywords
Solvents; Protective-clothing; Gas-chromatography; Sampling; Chemical-analysis; Occupational-health; Occupational-exposure; Xylenes; Acetones
Contact
National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, Morgantown, WV 26505, USA
CODEN
ANALAO
CAS No.
67-56-1; 67-64-1; 78-93-3; 79-01-6; 127-18-4; 108-88-3; 108-38-3
Publication Date
19990601
Document Type
Journal Article
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Issue of Publication
6
ISSN
0003-2654
NIOSH Division
DSR
Source Name
Analyst
State
WV
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