摘要
从检出限、精密度和加标回收率等几方面，对加酸蒸馏和加水提取这两种土壤中挥发酚测定方法的前处理方法进行比较，馏出液采用4一氨基安替比林分光光度法进行测定。经实验验证，采用加酸蒸馏法作为前处理方法，土壤中挥发酚的检出限为O．14mg／kg，加标回收率为89．6％-93．8％，相对标准偏差为1．11％；采用加水提取法作为前处理方法，土壤中挥发酚的检出限为0．88mg／kg，加标回收率为71．2％~80．4％，相对标准偏差为6．22％。结果表明，采用加酸蒸馏法作为前处理方法，土壤中挥发酚的检出限更低，精密度和准确度更好。
To compare two pretreatment methods, which are acid distillation and water extraction for volatile phenols in soil by detection limit, precision and recovery rate, the distillate was determined by 4-amino antipyrine spectropho- tometry. By experimental verification, taken acid distillation as pretreatment method for volatile phenols in soil, the method detection limit was 0.14 mg/kg, the recovery was 89.6% ~93.8% and the relative standard deviation was 1.11%; taken water extraction as pretreatment method for volatile phenols in soil, the detection limit is 0.88 mg/kg, the recovery is 71.2% ~ 80.4% and the relative standard deviation is 6.22%. The results showed that, acid distillation is a better pretreatment method for the determination of volatile phenols in soil.
出处
《环境保护与循环经济》
2014年第10期60-62,共3页
environmental protection and circular economy
关键词
挥发酚
前处理方法
加酸蒸馏法
加水提取法
volatile phenols
pretreatment method
acid distillation
water extraction
