萃取光度法测定水中氯硝柳胺含量的研究

Determination of niclosamide in water with extraction photometry

目的实验室条件下,采用萃取光度法测定水中氯硝柳胺含量。方法采用1:9乙酸丁酯-石油醚混合溶剂萃取,再用NaOH反萃取有机相中的氯硝柳胺,用双波长光度法测定。结果在实验室条件下,氯硝柳胺的提取率达93％。测定的线性范围为0-4g／m3,检出限为0．042 7 g／m3, 方法的表观摩尔吸光系数为1．26×105L／(mol·cm)。结论萃取光度法能用于水样中氯硝柳胺含量的现场检测。

Objective To study the method and conditions of determination of niclosamide in water. Methods Niclosamide was extracted by mixed extractent, then striped by NaOH. Niclosamide in NaOH solution was determined with dual-wavelength photometry. Results The recovery of niclosamide was 93%, The linear ranger was 0--4.0 g/m^3 and the detectable limit for niclosamide was 0. 042 7 g/m^3. The apparent molar absorptivity was 1.26×10^5 L/（mol · cm）. Conclusion Extraction photometry is suitable for determination of niclosamide in water in the field.