摘要
改进了国标法中对饮用水中挥发酚的测定方法,采用浓缩水样加碱蒸馏直接比色法代替国标法中的蒸馏萃取比色法。实验结果表明:改进后的方法标准曲线线性良好,回收率高,并且实验采用乙醇处理过的4氨基安替比林试剂,消除了空白管吸光值高的现象,提高了方法的灵敏度和结果的准确度。
The method of detecting volatile phenols in drinking water by national standard determination was improved.The extractive distillation colorimetry of national standard determination was replaced by alkali distillation colorimetry on concentrated water samples.The results showed that the linearity of standard curve of the improved method was better and the recovery was in accepted scope.The problem of high absorbance of blank was solved when 4-amino-antipyrin purified by ethanol was used as reagent,which enhanced the sensitivity of the detection and accuracy of the results.
出处
《粮油食品科技》
2011年第4期40-41,47,共3页
Science and Technology of Cereals,Oils and Foods
关键词
饮用水
挥发酚
国标
4-氨基安替比林
drinking water
volatile phenol
national standard
4-amino-antipyrin
