The use of cholinesterase for the detection of organophosphorus chemical warfare agents with the GSP-11 device

An enzymatic method of detecting highly toxic chems. from the group of phosphonates was presented. The method was analyzed in terms of the degree of cholinesterase activity depending on the concn. of the toxic agent. The change of color intensity with time depending on the concn. of sarin in the gas sample was compared using a UV-Vis spectrometer. The method was very sensitive and allowed the detection of sarin at very low concns. of 1.10(-6) g/m(3).