Determination of 3,3'-dichloro-4,4'-diaminodiphenylmethane in air.
A simple gas chromatographic method is described for the analysis of 3,3'-dichloro-4,4'diaminodiphenylmethane (MOCA) in air. MOCA is quantitatively collected on a Gas-Chrom S tube and the solid sorbent is extracted with acetone. An aliquot sample of the extract is introduced directly into the gas chromatograph, using a microsyringe and the sample is chromatographed on a 1-ft.,silylated 10% Dexsil column. The peak area of MOCA is measured and related to the concentration via a calibration curve prepared with a constant volume of standards. The chloroanilines associated with MOCA cause no interference; however, interference can be expected from any compounds having a retention time identical to that of MOCA. As little as 0.002 mug of MOCA per mul of acetone can be detected by this method.
D000042:Absorption; D000393:Air Pollutants / Q000032:analysis*; D000814:Aniline Compounds / Q000032:analysis; D001559:Benzhydryl Compounds / Q000032:analysis*; D002273:Carcinogens / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D006358:Hot Temperature; D012997:Solvents
D000393:Air Pollutants; D000814:Aniline Compounds; D001559:Benzhydryl Compounds; D002273:Carcinogens; D012997:Solvents