Page:NIOSH Manual of Analytical Methods - 2550.pdf/5

 BENZOTHIAZOLE IN ASPHALT FUME: METHOD 2550, Issue 1, dated 15 January 1998 - Page 5 of 5

FIGURE 1: This is a chromatogram from the analysis of benzothiazole in an asphalt fume sample. The major peak at approximately 18 minutes is benzothiazole. In many cases, the sample matrix may not be this complex and the chromatographic conditions can be adjusted to suit the analysis needs.

FIGURE 2: The chromatogram shown here is a typical chromatogram from the analysis of a desorbed laboratory spiked ORBO-43 sampling tube. The chromatographic conditions have been altered to give a shorter retention time for the benzothiazole because there are no other interfering compounds present.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition