摘要
目的建立水中微量硝基苯的快速测定方法。方法在酸性条件下,采用萃取-分光光度法反萃取技术分离并富集水中微量硝基苯,以铜盐为催化剂,硝基苯还原为苯胺,经重氮化与二盐酸-1-萘乙二胺偶合生成稳定紫红色络合物。结果该络合物在540nm有最大吸收,其摩尔吸光系数ε540=2.6×104/(mol·cm),在0.5～40μg/25ml(20～1600μg/L)范围内符合比耳定律,最低检测质量浓度为0.002mg/L,回收率为104.1%～109.1%,RSD<6%。结论该方法适用于测定水中的微量硝基苯的含量,结果满意。
Objective To develop a rapid method for the determination of trace nitrobenzene in water. Methods In the acidic medium, the separation and enrichment of trace nitrobenzene in water by the technique of extraction-back extraction was done. With catalyst copper salt, nitrobenzene can be reduced into aniline and through the diazotization with hydrochloride naphthyl ethylenediamine, then form a stable purple complex which can be determined by spectrophotometry. Results The maximum absorption of the complex was a...
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2008年第4期346-348,共3页
Journal of Environment and Health
关键词
水
萃取
分光光度法
硝基苯
Water
Extraction
Spectrophotometry
Nitrobenzene
