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

doi:10.13218/j.cnki.csdc.2018.09.011

Abstract

Abstract: To establish a method for the determination of N,N-dimethyl-1,3-propanediamine (DMAPA)in amphoteric 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.

Key words: amphoteric surfactant, HPLC, N,N-dimethyl-1,3-propanediamine

CLC Number:

TQ423.3

LEI Xiao-ying, SHI Li-wen, XU Kun-hua, GE Zan, YANG Hai-qing, WANG Jing. Determination of N,N-dimethyl-1,3-propanediamine in amphoteric surfactants by pre-column derivatization high performance liquid chromatography[J].China Surfactant Detergent & Cosmetics, 2018, 48(9): 541-544.

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Determination of N,N-dimethyl-1,3-propanediamine in amphoteric surfactants by pre-column derivatization high performance liquid chromatography

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