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Original Articles

A novel method for the rapid detection of benzo(a)pyrene in liquid milk by dimethyl sulfoxide selectively enhanced synchronous fluorescence spectrometry

, , , , , , & show all
Pages 1219-1225 | Received 11 Jan 2014, Accepted 25 Apr 2014, Published online: 02 Jun 2014
 

Abstract

Based on the high solubility efficiency and strong fluorescence response of benzo(a)pyrene (BaP) in dimethyl sulfoxide in combination with the high-performance derivative constant-energy synchronous fluorescence spectroscopic (DCESFS) technique, a simple, sensitive and economic method was developed for the determination of BaP in liquid milk. This method comprises ultrasound-assisted solvent extraction, solvent replacement and DCESFS detection. No saponification or other tedious clean-up procedures were needed. The recoveries of BaP in different milk samples were greater than 82%. Detection limits in full- and low-fat milk were 0.03 and 0.04 μg kg–1, respectively.

Funding

This work was supported by the National Science Foundation of China [grant numbers 21375111, 21127005], and the funds of the Ministry of Education of China [grant numbers 20110121110011, PCSIRT IRT13036].

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