In situ Colorimetric Determination of Bisphenol A Using Silver Nanoparticles

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Abstract
Bisphenol A (BPA, 4,4'-dihydroxy-2,2-diphenylpropane) which has carcinogenic effects in breast and ovarian cancers can be released from cans and polycarbonate plastic products in dependence of temperature and pH. The present paper reports a simple spectrophotometric method for BPA detection in baby bottles and compact disks in the presence of Triton X-100. The proposed method is based on the formation of silver nanoparticles (AgNPs) in a medium containing ammonia and sodium hydroxide. The yellow color of AgNPs resulting from the localized surface plasmon resonance of AgNPs at 425 nm makes it possible to quantify BPA. Under the optimized conditions, the calibration curve of the proposed method was linear in the concentration range of 0.06–4 mg/L with the detection limit of 20 µg/L. The proposed method was successfully applied to determine BPA in some common products including baby bottles and compact disks after extraction in alkaline media.

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