High sensitive determination of zinc with novel water-soluble small molecular fluorescent sensor |
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Authors: | Ying Weng Fang Wang Hua Jiang |
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Affiliation: | a Department of Pharmaceutical Analysis, College of Pharmacy, Wuhan University, Wuhan, Hubei 430072, China b Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Photochemistry, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract: | A high sensitive method of quantitative analysis for the determination of zinc in the nutrition supplements has been developed by using a novel water-soluble fluorescent sensor HQ3: (8-pyridylmethyloxy-2-methyl-quinoline). Under the optimized condition of 67 mM phosphate buffer, pH 7.4, and 5% (v/v) DMSO, the zinc concentration showed good linear relationship with fluorescence intensity in the range of 7.5 × 10−8 to 2.5 × 10−5 M with the detection limit of 1.5 × 10−8 M. HQ3 exhibited high selectivity to zinc comparing with other metal ions except for cadmium. The developed analytical method was successfully used for determining the content of zinc in a real sample of zinc gluconate solution of Sanchine. |
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Keywords: | Zinc ion Fluorospectrophotometry Quantitative analysis 8-Hydroxyquinoline-based fluorescent sensor Trace analysis |
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