紫外分光光度法测定饮用纯净水中邻苯二甲酸二己酯含量

UV Spectrometric Determination of Diethylhexyl Phthalatein Purified Drinking Water

目的:为建立饮用纯净水中的邻苯二甲酸二己酯含量的测定方法。方法:利用正己烷萃取饮用纯净水中的邻苯二甲酸二己酯,氮吹并用甲醇定容,建立紫外分光光度法对其进行含量测定,并对条件进行优化。结果:方法标准曲线方程为y=1.5347x+0.0266,线性相关系数为0.9970,该方法连续测定精密度为0.644%,重现性相对标准偏差为0.5742%,加标回收率为88.89%～97.73%。结论:建立紫外分光光度法测定瓶装饮用纯净水中邻苯二甲酸二己酯的方法,该方法简单快速,结果令人满意。

Objective： To establish a UV spectrometric method to determine diethylhexyl phthalate （DEHP） in purified drinking water. Methods： DEHP in drinking water was extracted with n-hexane, blow-dried with nitrogen gas, and brought to a final volume with methanol. Experimental conditions for DEHP determination were optimized. Results： A standard curve equation was built as follows： y = 1.5347x ＋ 0.0266 with linear correlation coefficient of 0.9970. The relative standard deviations of precision and reproducibility were 0.644% and 0.5742%, respectively. The average spike recovery rates were 88.89%-99.73%. Conclusion： This method is characteristics of simple operation, fast determination and satisfactory results.