A novel liquid colorimetric probe for highly selective and sensitive detection of lead (II)
| Autor: | Supalax Srijaranai, Siriboon Mukdasai, Rodjana Burakham, Melasinee Laosuwan, Choosak Poonsawat |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Liquid Phase Microextraction
01 natural sciences Analytical Chemistry chemistry.chemical_compound 0404 agricultural biotechnology Colorimetric sensor Limit of Detection Animals Phenol Chromatography 010401 analytical chemistry 04 agricultural and veterinary sciences General Medicine Highly selective 040401 food science 0104 chemical sciences Deep eutectic solvent Milk Linear range chemistry Solvents Colorimetry Dithizone Enrichment factor Food Science Choline chloride |
| Zdroj: | Food Chemistry. 363:130254 |
| ISSN: | 0308-8146 |
| DOI: | 10.1016/j.foodchem.2021.130254 |
| Popis: | A novel liquid colorimetric sensor based on deep eutectic solvent (DES) was developed for the preconcentration and detection of Pb2+ in fruit juice, milk and cereal samples. The colorimetric probe was simply fabricated by adding dithizone (DZ) into DES, prepared from choline chloride and phenol. Pb2+ was formed complex with DZ in the probe, providing hydrophobic complex of [Pb-DZ] which was simultaneously extracted into DES and the color was changed from light orange to carmine red. The enriched [Pb-DZ] in DES was detected using spectrophotometer at 520 nm and naked-eyes. In addition, a smartphone in combination with an Image J program was used as an alternative detection device. Under optimal conditions, the enrichment factor was 92 with LOD of 2.1 µg L−1 and the linear range was 0.007–0.075 mg L−1. The proposed liquid colorimetric sensor was successfully applied for Pb2+ detection in various food samples and the results were in good agreement with those obtained by FAAS. The advantages of this method are simple, rapid, environmental friendly and low cost. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect