CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal; Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, USA.
Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, USA.
Talanta. 2015 Oct 1;143:320-327. doi: 10.1016/j.talanta.2015.04.081. Epub 2015 May 16.
A new paired ion electrospray ionization tandem mass spectrometry method for determination of anionic surfactants in water samples was developed. In this method, dicationic ion-pairing reagents were complexed with monoanionic analytes to facilitate analyte detection in positive mode electrospray ionization - mass spectrometry. Single ion monitoring and selected reaction monitoring on a triple quadrupole instrument were performed and compared. Four dicationic reagents were tested for the determination of perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), sodium dodecyl sulfate (SDS), dodecylbenzene sulfonic acid (DBS), and stearic acid (SA), among other common anions. The obtained limits of detection were compared with those from previous literature. Solid phase extraction using a C18 cartridge was performed in order to eliminate matrix interferences. A literature review was compiled for the methods published between 2010 and 2015 for determination of anionic surfactants. The optimized method was more sensitive than previously developed methods with LOD values of 2.35, 35.4, 37.0, 1.68, and 0.675 pg for SDS, SA, DBS, PFOS, and PFOA, respectively. The developed method was effectively applied for the determination of anionic surfactants in different water samples such as bottled drinking water, cooking water, tap water, and wastewater.
建立了一种新的用于测定水样中阴离子表面活性剂的双离子电喷雾串联质谱法。在该方法中，二价阳离子离子对试剂与单价阴离子分析物络合，以促进正离子电喷雾 - 质谱中分析物的检测。在三重四极杆仪器上进行了单离子监测和选择反应监测，并进行了比较。测试了四种二价试剂用于测定全氟辛酸（PFOA），全氟辛烷磺酸（PFOS），十二烷基硫酸钠（SDS），十二烷基苯磺酸（DBS）和硬脂酸（SA）等常见阴离子。所得检测限与以前文献中的检测限进行了比较。为了消除基质干扰，使用 C18 小柱进行固相萃取。对 2010 年至 2015 年期间发表的用于测定阴离子表面活性剂的方法进行了文献综述。与以前开发的方法相比，优化后的方法具有更高的灵敏度，对于 SDS，SA，DBS，PFOS 和 PFOA 的检测限分别为 2.35，35.4，37.0，1.68 和 0.675pg。该方法有效地应用于不同水样中阴离子表面活性剂的测定，如瓶装饮用水，烹饪用水，自来水和废水。
