▎ 摘　　要

In this work, a new sensor array was designed for the discrimination of dimethyl methylphosphonate (DMMP) vapor from some other vapors, capable of interfering with DMMP vapor in the reduced graphene oxide (RGO)-based chemiresistor sensor. The referred sensor array was constructed using different RGOs, obtained by the application of various reducing agents in synthesis of the RGO. Three kinds of reducing agents including hydrazine hydrate, ascorbic acid and sodium borohydride were utilized for the reduction of graphene oxide, synthesized by chemical oxidation of graphite. It was found that the kind of reducing agent, used in the reduction of graphene oxide (GO) had huge effect on the DMMP sensitivity of the related RGO. Sodium borohydride and ascorbic acid led to the RGOs which were much sensitive to DMMP vapor than that was reduced by hydrazine hydrate. The electrical resistance changes of three kinds of RGOs were recorded upon exposing of them to various vapors and the obtained data were analyzed by principal component analysis. The obtained results showed that the RGOs, prepared by hydrazine hydrate and sodium borohydride, were the best combinations of different RGOs to efficiently discriminate DMMP from other vapors. (C) 2016 Published by Elsevier B.V.