本文介绍了一个用钼酸铵薄层层析来直接测定有机磷农药的方法。展开以后的薄板在110℃加热2小时,残留无机磷与钼酸铵作用生成磷钼酸盐,它再被抗坏血酸还原为蓝色化合物。用此方法在薄板上最低能检出0.1～0.2μg残留物。锑盐的加入可使蓝色加深,从而提高检出灵敏度。试剂 (1)溶剂——E MerckGR或将BDH AR级重蒸馏。 (2)硅胶——BDH或Aeme硅胶。 (3)钼酸铵-锑试剂——溶解10 g GR级E Merck钼酸铵在40 ml 4 N硫酸中,另外溶解0.1 g GR级酒石酸锑钠在50 ml 4 N硫酸 This article describes a method for the direct determination of organophosphorus pesticides by ammonium molybdate thin layer chromatography. After expansion, the sheet was heated at 110 ° C for 2 hours. The remaining inorganic phosphorus reacted with ammonium molybdate to form phosphomolybdate, which was reduced to ascorbic acid by ascorbic acid. Using this method, a minimum of 0.1 ~ 0.2 μg of residue can be detected on the plate. Antimony salt can be added to deepen the blue, thereby enhancing the detection sensitivity. Reagent (1) Solvent - E Merck GR or BDH AR grade Heavy Distillation. (2) Silica gel - BDH or Aeme silica gel. (3) Ammonium molybdate-antimony reagent-Dissolve 10 g of GR grade E Merck Ammonium molybdate In 40 ml of 4 N sulfuric acid, dissolve additionally 0.1 g of sodium tartrate of GR grade in 50 ml of 4 N sulfuric acid