Machin M V, Dingle J H
J Assoc Off Anal Chem. 1977 May;60(3):696-8.
A simple and reliable method has been developed for determining chlordimeform. A preliminary cleanup converts chlordimeform to its hydrochloride and removes ultraviolet-absorbing impurities. The aqueous acid phase containing chlordimeform. HCL is diluted and passed through a silica gel column. The column efflucent is used as the reference solution and a portion not eluted through silica gel is used as the sample solution in the spectrophotometer. The absorbance at 240 nm is measured, and chlordimeform concentration is determined from the calibration graph. The method applied to solutions of acaricides gives good results in the range of 0.02-0.06% w/v chlordimeform; higher concentrations may be determined by appropriate dilution.
已开发出一种简单可靠的方法来测定杀虫脒。初步净化过程将杀虫脒转化为其盐酸盐，并去除吸收紫外线的杂质。含有杀虫脒盐酸盐的水相酸溶液经稀释后通过硅胶柱。柱流出液用作参比溶液，未通过硅胶洗脱的一部分用作分光光度计中的样品溶液。测量240nm处的吸光度，并根据校准曲线确定杀虫脒浓度。该方法应用于杀螨剂溶液时，在杀虫脒浓度为0.02 - 0.06% w/v范围内可得到良好结果；更高浓度可通过适当稀释来测定。
