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Manual and Flow-Injection Detection/Quantification of Polyquaterniums via Fully Reversible Polyion-Sensitive Polymeric Membrane-Based Ion-Selective Electrodes
ACS Sensors ( IF 8.2 ) Pub Date : 2017-09-18 00:00:00 , DOI: 10.1021/acssensors.7b00527
Stephen A. Ferguson 1 , Mark E. Meyerhoff 1
Affiliation  

The detection of four different polyquaterniums (PQs) using a fully reversible potentiometric polyion sensor in three different detection modes is described. The polyion sensing “pulstrodes” serve as the detector for direct dose–response experiments, beaker titrations, and in a flow-injection analysis (FIA) system. Direct polycation response toward PQ-2, PQ-6, PQ-10, and poly(2-methacryloxyethyltrimethylammonium) chloride (PMETAC) yields characteristic information about each PQ species (e.g., relative charge densities, etc.) via syringe pump addition of each PQ species to a background electrolyte solution. Quantitative titrations are performed using a syringe pump to deliver heparin as the polyanion titrant to quantify all four PQs at μg/mL levels. Both the direct and indirect methods incorporate the use of a three-electrode system including counter, double junction reference, and working electrodes. The working electrode possesses a plasticized poly(vinyl chloride) (PVC) membrane containing the neutral lipophilic salt of dinonylnaphthalenesulfonate (DNNS) tridodecylmethylammonium (TDMA+). Further, the titration method is shown to be useful to quantify PQ-6 levels in recreational swimming pool water collected in Ann Arbor, MI. Finally, a FIA system equipped with a pulstrode detector is used to demonstrate the ability to potentially quantify PQ levels via a more streamlined and semiautomated testing platform.

中文翻译:

通过完全可逆的基于聚离子的聚合物膜离子选择电极进行手动和流动注射检测/定量季铵盐

描述了在三种不同的检测模式下使用完全可逆的电位聚离子传感器对四个不同的聚季铵盐(PQ)的检测。聚离子传感“脉冲电极”用作直接剂量响应实验,烧杯滴定和流动注射分析(FIA)系统中的检测器。通过注射泵分别对PQ-2,PQ-6,PQ-10和聚(2-甲基丙烯酰氧基乙基三甲基铵)氯化物(PMETAC)进行直接聚阳离子反应可得到有关每种PQ种类的特征信息(例如,相对电荷密度等)。 PQ种类为背景电解质溶液。使用注射泵进行定量滴定,以肝素为聚阴离子滴定剂,以μg/ mL的水平对所有四个PQ进行定量。直接和间接方法都结合使用三电极系统,包括反电极,双结参考电极和工作电极。工作电极具有塑化的聚氯乙烯(PVC)膜,该膜包含中性的二壬基萘磺酸盐(DNNS)亲脂性盐)十三烷基甲基铵(TDMA +)。此外,该滴定方法显示出对量化密歇根州安阿伯市所收集的休闲游泳池水中PQ-6含量有用的方法。最后,配备有脉动检测器的FIA系统用于通过更简化和半自动化的测试平台展示潜在量化PQ水平的能力。
更新日期:2017-09-19
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