摘要
针对五氯酚（PCP）污染土壤,根据NaOH与五氯酚反应生成五氯酚钠的原理,将不易溶于水的PCP与碱液反应生成易溶于水的盐类,从而达到从土壤中提取五氯酚的目的。用紫外分光光度法定量测定五氯酚含量,确定出最佳提取与分析条件。结果表明,PCP-Na合适的紫外吸收波长为319 nm;在300 r/min振荡时,最佳提取条件为提取液pH〉12.5、土液比为1∶8（g/mL）、提取时间为20 min。在此条件下,加标回收率为91.2%～116.7%,最低检测限为2μg/mL。方法快速、简便,适合于农田土壤中五氯酚的现场检测。
Based on the principle of the reaction of NaOH with pentachlorophenol （PCP） and formation of PCP-Na, water-insoluble of PCP is transformed into water-soluble salts （PCP-Na） to realize the extraction of PCP from the soils. Ultraviolet spectrophotometric method was adopted to determine PCP at 319 nm. The extraction condition for PCP was optimized with the stirring rate of 300 r/min, extraction solution at pH 〉 12.5, the ratio of soil/liquid = 1/8 （g/mL） and extraction time of 20 min. The sensitivity of the method is 2 μg/mL for PCP with recovery of 91.2% -108.1%. The method has been applied to the analysis of PCP in farmland soils with advantages of high efficiency simple operation.
出处
《岩矿测试》
CAS
CSCD
2008年第2期117-119,共3页
Rock and Mineral Analysis
基金
哈尔滨工程大学基础研究基金项目资助(002100260716)
关键词
五氯酚
紫外分光光度法
土壤
快速测定
pentachlorophenol
ultraviolet spectrophotometry
soil
rapid determination
