Galeano Teresa, Guiberteau Agustina, Mora Nielene M, Alvarez Pedro R, Salinas Francisco
Department of Analytical Chemistry, Faculty of Sciences, University of Extremadura, Badajoz, Spain.
J Environ Sci Health B. 2002 Nov;37(6):533-40. doi: 10.1081/PFC-120015437.
A spectrophotometric method for the determination of the fungicide captan has been developed based on its reaction with thiosemicarbazide. The absorbance was measured at 315 nm. The effects of the proportion of water, thiosemicarbazide concentration, pH and temperature on this reaction was studied to select the best chemical conditions. The calibration graph was obtained between 1.2 and 30 ppm and the detection limit is 0.5 ppm. The RSD (n = 10) was 1.34%. Possible interference of various pesticides was examined. The method was applied to the determination of captan in agrochemical formulations. Results agree well with the labelled values and also with results that were obtained by a polarographic method.
基于福美双与氨基硫脲的反应，开发了一种分光光度法用于测定杀菌剂福美双。在315nm处测量吸光度。研究了水的比例、氨基硫脲浓度、pH值和温度对该反应的影响，以选择最佳化学条件。校准曲线在1.2至30ppm之间获得，检测限为0.5ppm。相对标准偏差（n = 10）为1.34%。考察了各种农药可能的干扰。该方法应用于农用化学品制剂中福美双的测定。结果与标签值以及通过极谱法获得的结果吻合良好。
