An optical material for the detection of trace S2O32− in milk based on a copper complex

• Published in: Biometals Vol. 30; no. 3; pp. 441 - 447
• Main Authors: Wang, Qingming, Sun, Huifang, Sha, Weilin, Chen, Juan, Gu, Liuyue, Wang, Dong, Tang, Xinhui
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.06.2017; Springer Nature B.V
• Subjects: Absorbance; Anions; Aqueous solutions; Biochemistry; Biomedical and Life Sciences; Cell Biology; Color; Colorimetry; Copper; Fluorescence; Life Sciences; Materials science; Medicine/Public Health; Microbiology; Milk; Pharmacology/Toxicology; Plant Physiology; Sensors; Sulfur oxides; Thiosulfates; S; Copper complex; 1,10-Phenanthroline-5,6-dione; Chemodosimeter; O
• ISSN: 0966-0844; 1572-8773
• DOI: 10.1007/s10534-017-0017-y

A novel S 2 O 3 2− luminescent sensor (Cu 2+ - p -CPIP) was developed and the presence of S 2 O 3 2− caused an obvious fluorescence enhancement at 420 nm upon excitation at 330 nm, which could be distinguished with the naked eye under a UV lamp. Remarkably, the compound exhibited excellent selective and sensitive response to S 2 O 3 2− over other common anions with a micromolar limit of detection (0.442 μM) in DMSO/H 2 O (v/v, 1:1) buffer. The absorbance intensity and the color of Cu 2+ - p -CPIP solution changed gradually with the increase of S 2 O 3 2− concentration. The proposed method was applied to the determination of S 2 O 3 2− in milk samples and the recoveries were 97.5–105 %. The preparation of Cu 2+ - p -CPIP exhibited the quick, simple and facile advantages. The results showed that Cu 2+ - p -CPIP can be a good candidate for simple, rapid and sensitive colorimetric detection of S 2 O 3 2− in aqueous solution.