Gorbunova Marina O, Bayan Ekaterina M
Southern Federal University, Department of Chemistry, Zorge st., 7, 344090 Rostov-on-Don, Russia; Rostov State Medical University of the Ministry of Healthcare of Russian Federation, Pharmaceutical Faculty, Nakhichevansky Lane, 29, 344022 Rostov-on-Don, Russia.
Southern Federal University, Department of Chemistry, Zorge st., 7, 344090 Rostov-on-Don, Russia.
Talanta. 2019 Jul 1;199:513-521. doi: 10.1016/j.talanta.2019.02.093. Epub 2019 Feb 28.
A new chemosensor in the form of indicator paper, which is sensitive to chlorine and bromine concentrations, is proposed. A simple technique of sensor preparation in a laboratory without expensive reagents is described. The method provides uniform and reproducible distribution of the reagent. A possibility to use the sensor for chemical analysis when combining with dynamic gas extraction with the application of scanner technologies and color image processing is demonstrated. Sensitive and selective techniques of chlorine, bromine, chloride, and bromide determination have been developed. The limits of detection of bromine, chlorine, bromide, and chloride have been found to be 0.06, 0.28, 0.5 and 1.4 μmol L respectively. A scheme of successive determination of these analytes in the same sample including selective halides oxidation is proposed. In the simple and available set-up used for dynamic gas extraction, sample decomposition, oxidation of halide-ions and extraction of the formed halogen take place simultaneously while the color reaction of halogen interaction with the sensor is conducted out of the analyzed solution with reagents. This approach provides high selectivity and good analytical characteristics of analysis of such complex samples as foods, pharmaceutical formulations, and different water objects. The method is easy-to-use, cost-effective, time-efficient and promising for determination of other volatile compounds.
本文提出了一种对氯和溴浓度敏感的指示纸形式的新型化学传感器。描述了一种在实验室中无需昂贵试剂即可制备传感器的简单技术。该方法可使试剂分布均匀且具有可重复性。展示了将该传感器与动态气体萃取相结合，并应用扫描仪技术和彩色图像处理技术进行化学分析的可能性。已开发出灵敏且选择性的氯、溴、氯化物和溴化物测定技术。发现溴、氯、溴化物和氯化物的检测限分别为0.06、0.28、0.5和1.4 μmol·L。提出了在同一样品中连续测定这些分析物的方案，包括选择性卤化物氧化。在用于动态气体萃取的简单且实用的装置中，样品分解、卤离子氧化和生成的卤素萃取同时进行，而卤素与传感器相互作用的显色反应则在分析溶液外与试剂进行。这种方法为分析食品、药物制剂和不同水体等复杂样品提供了高选择性和良好的分析特性。该方法易于使用、成本效益高、省时高效，并且在测定其他挥发性化合物方面具有前景。
