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本文叙述了丙二酰双酰肼(MDH)还原剂的应用和合成,使用该试剂测定了大量的有机磷农药如安果、乐果和久效磷。MDH的制备将用乙醇(150ml)配制的二乙基丙二酸酯(38ml;1mol/L)加到用乙醇配制(100ml)水和肼(25ml;2mol/L)中,然后,加入浓H_2SO_45ml,回流30min,过滤出白色沉淀物,用乙醇洗涤并干燥,生成的粗产物用含水乙醇重结晶(产率52%),MP:250～252℃;Vmax(Najol)/ml:2936,2864,1772,1516,1466,1380,1144,1032和970(实测值:C,34.7;H,7.65;N,26.9;C_3H_8N_4O_2理论值:C,34.61;H,7.69;N,26.92%)。测定步骤加钼酸铵溶液(2.5%;2ml)于
In this paper, the application and synthesis of malonyl dihydrazide (MDH) reductant are described. A large number of organophosphorus pesticides such as dimethoate, dimethoate and monocrotophos were determined using this reagent. Preparation of MDH Diethylmalonate (38 ml; 1 mol / L) in ethanol (150 ml) was added to water (100 ml) and hydrazine (25 ml; 2 mol / L) in ethanol, followed by the addition of concentrated H 2 SO 4 , Refluxed for 30 min, the white precipitate was filtered off, washed with ethanol and dried. The resulting crude product was recrystallized from aqueous ethanol (52% yield), MP: 250-252 ° C .; Vmax (Najol) / ml: 2936, 2864, 1772, 1516, 1466, 1380, 1144, 1032 and 970 (Found: C, 34.7; H, 7.65; N, 26.9; C 3 H 8 N 4 O 2 requires C, 34.61; H, 7.69; N, 26.92%). Determination of ammonium step solution (2.5%; 2ml) in