摘要
A new method for the determination of trace nitrite by spectrophotometric after cloud point extraction was proposed.The effects of experimental conditions such as acidity,concentration of chromogenic reagent and surfactant,equilibration temperature and time on cloud point extraction were discussed.Under the optimum conditions,a good linear relationship was obtained in the range of 4.0～200 μg/L of the nitrite(r=0.9998),the detection limits of 0.43 μg/L.The recoveries fell in the range from 97.7% to 102.4% and the relative standard deviations were between 1.8% and 3.2%.This method has been applied for the determination of nitrite in real water samples with satisfactory results.
A new method for the determination of trace nitrite by spectrophotometric after cloud point extraction was proposed. The effects of experimental conditions such as acidity, concentration of chromogenic reagent and surfactant, equilibration temperature and time on cloud point extraction were discussed. Under the optimum conditions ,a good linear relationship was obtained in the range of 4.0 -200μg/L of the nitrite （r = 0. 9998）, the detection limits of 0.43 μg/L. The recoveries fell in the range from 97.7% to 102.4% and the relative standard deviations were between 1.8% and 3.2%. This method has been applied for the determination of nitrite in real water samples with satisfactory results.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第7期1083-1085,共3页
Chemical Research and Application
基金
湖北省教育厅科学技术研究项目(Q20096001)
关键词
浊点萃取
分光光度法
亚硝酸根
分离富集
水样
cloud point extraction
speetrophotometry
nitrite
separation and enrichment
water sample
