Appendix L. Chemical Analytical Method

Scope: This method was developed to analyze MITC from air sample tubes using GC/NPD. The reporting limit is 0.2 ltg per sample. Principle: MITC (Methyl Isothiocyanate), CHs-N=C=S, that has been absorbed from the air onto activated charcoal is desorbed from the charcoal with 0.1 % CSz in ethyl acetate and analyzed by gas chromatography usinga Nitrogen Phosphorus Detector (NPD). Reagents and equipment: Reagents: 1. Carbon disulfide, nanograd