zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-1019Research ArticleАННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙABSTRACTS ENGLISH-LANGUAGE ARTICLESРазделение, концентрирование и определение свинца, кадмия и железа с использованием экстракции в точке помутнения и пламенной атомно-абсорбционной спектрометрииSeparation, Preconcentration, and Determination of Lead, Cadmium, and Iron Using Cloud Point Extraction with Flame Atomic Absorption SpectrometryLiZh.LiZh.

 Нанкин 

 Nanjing 

lizhe@njpi.edu.cnZhangY.ZhangY.

 Нанкин 

 Nanjing 

ZhangY.WangR.

 Нанкин 

 Nanjing 

JiangD.JiangD.

 Нанкин 

 Nanjing 

Школа биологии и окружающей среды Нанкинского политехнического институтаSchool of Biology and Environment, Nanjing Polytechnic Institute202224032022892289289Copyright © Li Z., Zhang Y., Zhang Y., Jiang D., 20222022Li Z., Zhang Y., Zhang Y., Jiang D.Li Z., Zhang Y., Wang R., Jiang D.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/1019

Разработан метод для обнаружения и определения предварительной концентрации свинца, кадмия и железа, основанный на экстракции в точке помутнения, с использованием пламенной атомно-абсорбционной спектрометрии. Метод применен при концентрации металлических микроэлементов в образцах ниже пределов обнаружения (LOD). Экспериментальные LOD 0.01, 0.01 и 0.3 ppm для Pb, Cd и Fe, соответственно, определены на основе значительного изменения наклона стандартной кривой. С использованием 2,6-диамино-4-фенил-1,3,5-триазина и 3-амино-7-диметиламино-2-метилфеназина (нейтрального красного) в качестве хелатообразующих агентов, а также Triton X-114 в качестве сурфактанта пробы воды обогащались элементами металлов. Процедура предварительного концентрирования оптимизирована путем изменения экспериментальных факторов, а именно температуры, времени равновесия, рН и концентрации хелатов и поверхностно-активного вещества. После оптимизации метода микроэлементы определены в следовых количествах с 20-кратным снижением пределов обнаружения и извлечением 99.8, 97.3 и 99.3 % для Pb, Cd и Fe соответственно.

The concentration of heavy metals in drinking water is an important standard for water quality evaluation and water pipeline corrosion detection. This research reports the development of a new method based on cloud point extraction for the separation, preconcentration, and detection of lead (Pb), cadmium (Cd), and iron (Fe) using flame atomic absorption spectrometry. This method was used because the concentration of metallic trace elements in the samples was lower than the limits of detection (LOD). The experimental LODs for Pb, Cd, and Fe, were 0.01, 0.01, and 0.3 ppm respectively, which were determined based on a significant sensitivity change in the slope of the standard curve. By using both 2,6-diamino-4-phenyl-1,3,5-triazine and 3-amino-7-dimethylamino-2-methylphenazine (Neutral Red) as chelating agents, and Triton X-114 as a surfactant, these metallic elements were enriched in water samples. The preconcentration procedure was optimized by varying the experimental factors such as temperature, equilibrium time, pH, and the concentration of the chelates and surfactant. After optimization, this method allowed the determination of these three trace elements with 20-times lower LODs and yielded recoveries of 99.8, 97.3, and 99.3% for Pb, Cd, and Fe, respectively.

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The authors declare that there are no conflicts of interest present.