Gas chromatographic (GC) and liquid chromatographic methods for the in
vestigation of phenylarsenic compounds are presented. With gas chromat
ography using an electron capture detector (ECD), the chemical warfare
agents PFIFFIKUS, CLARK I and CLARK II can be detected. After derivat
ization with mercaptans and dimercaptans the sum of diphenylarsenic co
mpounds resp. phenylarsenic and phenylarsonic compounds can be detecte
d as the mercapto reap. dimercapto derivatives. High performance liqui
d chromatography (HPLC) analysis may be used for the detection of trip
henylarsenic compounds and ADAMSITE.