NIOSH 1978 Oct:30 pages
An analytical method for the determination of 2-ethoxyethanol (110805) in air was developed. The method was based on the collection on 100 milligrams (mg) of activated charcoal, desorption with methanol on methylene-chloride, and analysis of the resulting solution by gas chromatography with a flame ionization detector. The method was tested using 18 spiked samples at concentrations ranging from 340 to 1460mg per cubic meter (m3), which represents 50, 100, and 200 percent of the OSHA standard of 740mg/m3. Another 18 samples collected from dynamically generated test atmospheres were tested at the same concentrations. Precision and accuracy of the method and storage stability of the samples were assessed. The samples were stable over a 7 day period with an average recovery of 109.0 percent for the 1 day samples and 103.5 percent for the 7 day samples. Breakthrough occurred at 43.2 minutes in samples of 1440mg/m3 at a rate of 0.2 liters per minute at high relative humidity. The coefficient of variation was 0.059 with an average agreement of the samples of 1.071. The authors conclude that the advantages of the method are that the sampling device is small, portable, and involves no liquids. Interferences are minimal. One disadvantage is that the size of the sample is limited by the capacity of the tube. The precision is affected by the reproducibility of the pressure drop across the tubes.
NIOSH-Author; NIOSH-Analytical-Method; Analytical-Method; Standards; Sampling; Standards-Completion-Program; SCP; Set-6;
NTIS Accession No.
Ten NIOSH Analytical Methods, Set 6, Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio, NTIS PB-288-629, 30 pages, 8 references