An improved step-by-step airflow/paper-based colorimetric method for highly selective determination of halides in complex matrices
Autor: | Aleksei A. Furletov, Margarita S. Kulyaginova, Vladimir V. Apyari, Anastasiya V. Shevchenko, Marina O. Gorbunova, Maria S. Garshina, Yury A. Zolotov, Stanislava G. Dmitrienko, Anastasiya A. Baulina |
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Rok vydání: | 2020 |
Předmět: |
Detection limit
chemistry.chemical_classification 010401 analytical chemistry Inorganic chemistry Extraction (chemistry) Iodide Halide 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound chemistry Bromide Halogen medicine Methyl orange 0210 nano-technology medicine.drug |
Zdroj: | Talanta. 219:121254 |
ISSN: | 0039-9140 |
Popis: | 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%. |
Databáze: | OpenAIRE |
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