摘要
目的建立饮用水中酚的快速测定方法。方法 250 mL样品中加入0.4 mL磷酸消除水中硫化物等干扰后,在氨水—氯化铵缓冲液提供的缓冲环境和有氧化剂铁氰化钾存在的溶液中,酚类与4-氨基安替比林生成红色安替比林染料,此染料用氯仿萃取后比色定量。结果本法测定饮用水中酚与国家标准4-氨基安替比林氯仿萃取分光光度法间差异没有显著性（P﹥0.05）。方法检出限0.002 mg/L,酚质量浓度在0.002~0.10 mg/L范围内,线性关系良好,相关系数r=0.9998,相对标准偏差RSD在3.0%~4.9%之间,加标回收率在95.7%~98.3%之间。结论该方法用于测定生活饮用水中酚,简便灵敏,快速准确。
Objectives To establish a method for rapid determination of phenol in drinking water. Methods Adding 0. 4 mL of phosphoric acid to 250 mL of water samples to eliminate the interference of sulfides in water.At pH = 10. 0 ± 0. 2 and under the effect of potassium ferricyanide as an oxidant,phenol in drinking water was reacted with 4- amino antipyrine to form a red dye antipyrine. After extracted with chloroform,the dye was quantified by colorimetric method. Results Comparing with the national standard method for the determination of phenol in drinking water with 4-amino antipyrine chloroform extraction spectrophotometry,there was no statistically significant difference（P 〉 0. 05） was observed between these two methods. The detection limit of the method in this study was 0. 002 mg /L. The concentration of phenol in the range of 0. 002 ~ 0. 10 mg /L was in a good linearity,and the correlation coefficient was r = 0. 9998,the relative standard deviation was 3. 0% ~ 4. 9%,the recovery of standard addition was 95. 7% ~ 98. 3%. Conclusions The determination of phenol in drinking water with a chloroform extracted antipyrine dye method was simple,sensitive,rapid and accurate.
出处
《环境卫生学杂志》
北大核心
2014年第5期491-493,共3页
JOURNAL OF ENVIRONMENTAL HYGIENE
关键词
快速测定法
饮用水
酚
rapid determination method
drinking water
phenol
作者简介
梁涛，主管检验师，主要从事水质分析工作 联系方式：新疆维吾尔自治区奎屯市沙湾街316号；邮编：833200；Email：ktcdc-jyk@163．com
