摘要
建立了高效液相色谱法同时测定柴油车尾气处理液中尿素和缩二脲含量的方法。采用流动相稀释、直接过膜的前处理技术,以甲醇:磷酸二氢钾水溶液(0.074 mol/L)=5:95为流动相进行洗脱,采用C18分析柱分离,DAD检测器检测样品的含量。实验结果表明,尿素和缩二脲在系列浓度范围内具有良好的线性关系,相关系数R^(2)分别为0.9994、0.9996,检出限分别为0.0035、0.0002 mg/mL,方法回收率为100.1%~110.4%,相对标准偏差RSD为0.4%~1.4%。该方法样品前处理简单,分析简便快速,可用于柴油车尾气处理液中尿素和缩二脲含量的检测分析。
A high-performance liquid chromatography method has been established for the simultaneous determination of urea and biuret content in diesel vehicle exhaust treatment solution.The pretreatment technology of mobile phase dilution and direct membrane passing was adopted,methanol:potassium dihydrogen phosphate aqueous solution(0.074mol/L)=5:95 was used as the mobile phase for elution,and the samples were separated by C18 analytical column,and the content of the samples was detected by DAD detector.The experimental resulted show that urea and biuret had a good linear relationship within a series of concentration ranges,the correlation coefficients R^(2) were 0.9994 and 0.9996,the detection limits were 0.0035 and 0.0002 mg/mL,the recovery rates were 100.1%~110.4%,and the relative standard deviation RSD were 0.4%~1.4%.This method is simple in sample pretreatment,simple and fast in analysis,and can be used for the detection and analysis of urea and biuret content in diesel vehicle exhaust treatment solution.
作者
杨照生
耿晓红
戴丽明
罗强
郑彦宁
蔡立鹏
李涛
张京京
Yang Zhaosheng;Geng Xiaohong;Dai Liming;Luo Qiang;Zheng Yanning;Cai Lipeng;Li Tao;Zhang Jingjing(Hebei Provincial Institute of Product Quality Supervision and Inspection,Shijiazhuang,050227,China)
出处
《煤炭与化工》
CAS
2023年第6期143-147,共5页
Coal and Chemical Industry
基金
国家市场监督管理总局2021年科技计划项目(2021MK018)
河北省市场监督管理局2022年科技计划项目(2022ZC07)。
关键词
柴油车尾气处理液
尿素
缩二脲
高效液相色谱法
C18分析柱
DAD检测器
Diesel vehicle exhaust treatment fluid
urea
biuret
high performance liquid chromatography method
C18 analysis column
DAD detector
