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日用化学工业:2018,Vol.>>Issue(9):-
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柱前衍生化液相色谱法测定两性表面活性剂中3-二甲氨基丙胺含量
雷小英,史立文,徐坤华,葛赞,仰海青,王晶
(赞宇科技集团股份有限公司,浙江 杭州 310009)
Determination of N,N-dimethyl-1,3-propanediamine in amphoteric surfactants by pre-column derivatization high performance liquid chromatography
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中文摘要: 为建立高效液相色谱法测定两性表面活性剂中3-二甲氨基丙胺(DMAPA)的方法,研究了衍生化条件和色谱条件对DMAPA检测的影响。结果显示在碱性条件下两性表面活性剂中的DMAPA和衍生化试剂异硫氰酸苯酯(PITC)反应生成苯基脲衍生物,利用苯基柱用乙腈梯度洗脱的方法将DMAPA衍生物与其他成分分离,并在254 nm下进行紫外检测,该方法标准溶液线性相关系数均为0.999 3,样品的回收率较好,平均回收率为95.9%~101.8%,能满足质量分析的要求。
Abstract:To establish a method for the determination of 3-dimethylamine (DMAPA) in ampholytic surfactants by HPLC, the influence of derivatization conditions and chromatographic conditions on DMAPA detection was investigated. The results show that under alkaline condition, DMAPA in amphoteric surfactants reacts with phenyl isothiocyanate (PITC) to form phenylurea derivatives. The DMAPA derivative is separated from other components by a phenyl column with acetonitrile gradient elution and UV detection at 254 nm. The linear correlation coefficient of the standard solution is 0.999 3. The recovery rate of the sample is good, and the average recovery is 95.9%~101.8%. This method can meet the requirements of quality analysis.
文章编号:     中图分类号:TQ423.3    文献标志码:
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