摘要
改进了4-APP萃取蒸馏法测定水中酚的方法,以100 mL馏出液代替250 mL馏出液,改变了原方法实验过程时间长、费时费力的缺点,特别适合地表水大批量样品的分析。经两种方法测定结果比对,吸光值变化不大,标准曲线相似,回收率符合规范要求;经t检验,测定结果无显著性差异。测定时间由原来的45 min缩短至25 min左右,大大提高了工作效率。
Introduced the improvement of determining volatile phenols in water by 4-APP extractive distillation method. 250 mL distillate was changed to 100 mL to avoid a long time distillation in the original method and can be applied in the analysis of large quantities of surface water samples. According to the comparison of the results of two methods, it showed that little changes were in absorbance, and their standard curves were similar. The recovery of both methods were in line with regulatory requirements. There was no significant difference by t test between the two methods. The distillation time was reduced from 45 min to 25 min. It improved the efficiency greatly.
出处
《环境监控与预警》
2010年第4期21-22,共2页
Environmental Monitoring and Forewarning
关键词
挥发酚
蒸出液
改进
volatile phenols
distillate
improvement
