【摘要】 利用电喷雾离子化质谱技术(ESIMS)快速鉴定了洗发水中的常用表面活性剂。在流动注射进样方式下,鉴定出所测试洗发水中含有2种主要表面活性剂:烷基单乙醇酰胺(CMEA)和脂肪醇聚氧乙烯十二烷基醚硫酸钠(SLES.nEO)。进一步通过高效液相色谱与质谱联用(HPLC-MS)利用ESI+和ESI-之间的切换完成对不同类型表面活性剂的定量检测,测定出该洗发水中CMEA的使用量为1.198%(质量分数),与实际添加量1.2%非常吻合。运用HPLC-MS对SLES.nEO在洗发水中的种类结构进行了鉴定。更多还原

【Abstract】 A rapid method for qualitative and quantitative analysis of surfactants in shampoo by using ESI MS was described in this paper.Two major surfactants in tested shampoo sample,CMEA and SLES·nEO,were rapidly characterized by flow injection with ESI MS,and quantified by HPLC-MS via alternating the detection modes between ESI+ and ESI-.The result obtained using HPLC-MS technology showed that the concentration of CMEA in shampoo was about 1.198%,which is very similar with the concentration of actual additive.In additional,the structure and type of SLES·nEO in the tested shampoo were identified by HPLC-MS.更多还原