Development of a high-sensitivity quantitative analytical method for determining polycarbamate by gas chromatography-mass spectrometry incorporating temperature-programmable inlet on-column injection.
A highly sensitive analytical method was developed using GC/MS with temperature-programmable inlet on-column injection (TPI on-column GC/MS) for determining methyl dimethyldithiocarbamate (DMDC-methyl) and dimethyl ethylenebisdithiocarbamate (EBDC-dimethyl), which are methyl derivatives of alkali decomposed polycarbamate. This method makes it possible to quantify 0.3 microg/l of polycarbamate in tap water, which is a 1/100 of the residual target value of 30 microg/l in Japan. Moreover, it now becomes possible to distinguish polycarbamate from other dithiocarbamate pesticides (DTCs) that have similar structures, including ziram and thiram, which only incorporate a DMDC side chain, or manzeb, maneb and zineb, which only incorporate an EBDC side chain, by simultaneously analyzing for DMDC-methyl and EBDC-dimethyl.
Kawamoto
Tatsuhiko
T
Hyogo Prefectural Institute of Public Health and Environmental Sciences, 2-1-29, Arata-cho, Hyogo-ku, Kobe 652-0032, Japan. Tatsuhiko_Kawamoto@pref.hyogo.jp
Yano
Miho
M
Makihata
Nobuko
N
D005028:Ethylenebis(dithiocarbamates) / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D012680:Sensitivity and Specificity; D013859:Thiocarbamates / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis
D005028:Ethylenebis(dithiocarbamates); D013859:Thiocarbamates; D014874:Water Pollutants, Chemical