An improved step-by-step airflow/paper-based colorimetric method for highly selective determination of halides in complex matrices

Marina O Gorbunova; Vladimir V Apyari; Anastasiya A Baulina; Maria S Garshina; Margarita S Kulyaginova; Anastasiya V Shevchenko; Aleksei A Furletov; Stanislava G Dmitrienko; Yury A Zolotov

doi:10.1016/j.talanta.2020.121254

An improved step-by-step airflow/paper-based colorimetric method for highly selective determination of halides in complex matrices

Talanta. 2020 Nov 1:219:121254. doi: 10.1016/j.talanta.2020.121254. Epub 2020 Jun 15.

Authors

Marina O Gorbunova¹, Vladimir V Apyari², Anastasiya A Baulina³, Maria S Garshina³, Margarita S Kulyaginova⁴, Anastasiya V Shevchenko³, Aleksei A Furletov⁵, Stanislava G Dmitrienko⁵, Yury A Zolotov⁶

Affiliations

¹ 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.
² Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991, Moscow, Russia. Electronic address: apyari@mail.ru.
³ Southern Federal University, Department of Chemistry, Zorge St., 7, 344090, Rostov-on-Don, Russia.
⁴ Rostov State Medical University of the Ministry of Healthcare of Russian Federation, Pharmaceutical Faculty, Nakhichevansky Lane, 29, 344022, Rostov-on-Don, Russia.
⁵ Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991, Moscow, Russia.
⁶ Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991, Moscow, Russia; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky Prospect, 31, 119991, Moscow, Russia.

PMID: 32887145
DOI: 10.1016/j.talanta.2020.121254

Abstract

An improved step-by-step colorimetric method for determination of halides has been developed. The method is based on successive selective oxidation of iodide, bromide and chloride into corresponding free halogens, their extraction by airflow and colorimetric detection with different paper test-strips. This procedure can be performed in a single analyzed solution and possesses high selectivity and good sensitivity due to the extraction step. Three types of paper test-strips were examined: paper modified with tetramethylammonium iodide and starch, paper modified with methyl orange and paper modified with silver triangular nanoplates. Limits of detection for iodide, bromide and chloride are 0.01, 0.02, and 0.04 mg L^-1 respectively in case of the last mentioned paper. The method was applied to the analysis of samples having complex matrices, such as various seafood, preserves, bread, and natural waters, showing good accuracy of the analysis with recoveries of 95-105% and relative standard deviations not higher than 6%.

Keywords: Determination of halides; Food analysis; Natural waters analysis; Paper-based sensors; Scanner colorimetry; Silver triangular nanoplates.