NIOSH 1978 Oct:21 pages
An analytical method for the determination of methyl-acetylene (74997) was developed. The method consisted of pumping air samples into a gas sampling bag with a personal sampling pump, then determining the methyl-acetylene content using gas chromatography with flame ionizing detection. The protocol consisted of analysis of 18 air samples spiked with 50, 100, and 200 percent of the OSHA standard of 1000 parts per million (ppm) methyl-acetylene, and 18 samples collected from dynamically generated test atmospheres at the same concentrations. The storage stability in the gas collection bags and the precision and accuracy of the method were assessed. The total coefficient of variation was 0.049 with recoveries at all concentrations of 91.7 percent. The mean concentrations in the gas sampling bags immediately after sampling and at 7 days were 1012 and 1095ppm, respectively. The authors conclude that the advantages of the method are that it is portable and involves no liquids, interferences are minimal, and the method is quick. A disadvantage is that the gas sampling bag is bulky and may be punctured during sampling or shipping.
NIOSH-Author; NIOSH-Analytical-Method; Analytical-Method; Standards; Sampling; Standards-Completion-Program; SCP; Set-6; Chemical-properties; Air-sampling;
NTIS Accession No.
Ten NIOSH Analytical Methods, Set-6, Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio, NTIS PB288-629, 21 pages, 7 references