Figure 7.

GC was performed to detect organophosphorus residues in HSW derived from (A) the Wudang mountain area and (B) the commercial products. 1, o,o-dimethyl-O-2,2-dichlorovinylphosphate; 2, omethoate; 3, acephate; 4, dimethoate; 5, diazinon; 6, parathion-methyl; 7, malathion; 8, parathion; 9, methidathion E.C; 10, ethion; a, HSW1; b, HSW2; c, HSW3; d, HSW4; e, HSW5; f, standard; g, Sichuan; h, Yunan; i, Hubei; j, Hunan; k, Henan; l, Guangdong; m, standard; Hz, hertz; GC, gas chromatography; HSW, Heshouwu.