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PDF | The combined use of sorbent tubes (ST) and thermal desorption (TD) Conditions for the optimal analysis of volatile organic compounds in air with sorbent tube sampling and the performance of the ST/TD method with LS calibration. Section II. (previously Section I of Oregon OSHA's Technical Manual) To avoid sample mix-up, each sample (i.e., cassette, sorbent tube, impinger media) must.Air sampling, using sorbents, thermal desorption and gas chromatography, is a versatile method for identifying and quantifying trace levels of volatile organic to demonstrate the efficiency of the sampling and analysis method. 4.1.4 Sorbent tubes - See Figure 2 for a diagram of a SMVOC tube. 4.1.4.1 The first and sampling with sample introduction by thermal desorption, Method 2 uses diffusive 3 A general guide to which of the three sorbent tube monitoring methods is 5 US Occupational Safety and Health Administration OSHA Manual of analytical. Sorbent tube sampling is the NIOSH/OSHA-approved method for collecting most hazardous gases and vapors from the air. The sorbent tube is glass with Jan 5, 1999 - Sorbent tube sampling is the NIOSH/OSHA-approved method for collecting most hazardous gases and vapors from the air. The sorbent tube is glass with For thermal desorption methods, the sorbent tube must be sampled in epa.gov/ttn/amtic/files/ambient/airtox/to-4ar2r.pdf. This method is applicable Mar 15, 2017 -