期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1346, 期 -, 页码 123-128出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2014.04.060
关键词
UFLC-MS/MS; Amino-functionalized low degrees of cross-linking magnetic polymer (NH2-LDC-MP); Magnetic dispersive solid-phase extraction (M-dSPE); Pigment; Wine; Soft drink
A novel, simple and sensitive method based on the use of magnetic dispersive solid-phase extraction (M-dSPE) procedure combined with ultra-fast liquid chromatography-tandem quadrupole mass spectrometry (UFLC-MS/MS) was developed to determine seven synthetic pigments (tartrazine, amaranth, carmine, sunset yellow, allura red, brilliant blue and erythrosine) in wines and soft drinks. An amino-functionalized low degrees of cross-linking magnetic polymer (NH2-LDC-MP) was synthesized via suspension polymerization, and characterized by transmission electron microscopy (TEM). The NH2-LDC-MP was used as the M-dSPE sorbent to remove the matrix from the solution, and the main factors affecting the extraction were investigated in detail. The obtained results demonstrated the higher extraction capacity of NH2-LDC-MP with recoveries between 84.0 and 116.2%. The limits of quantification (LOQs) for the seven synthetic pigments were between 1.51 and 5.0 mu g/L in wines and soft drinks. The developed M-dSPE UFLC-MS/MS method had been successfully applied to the real wines and soft drinks for food-safety risk monitoring in Zhejiang Province, China. The results showed that sunset yellow was in three out of thirty soft drink samples (2.95-42.6 mu g/L), and erythrosine in one out of fifteen dry red wine samples (3.22 mu g/L), respectively. It was confirmed that the NH2-LDC-MP was a kind of highly effective M-dSPE materials for the pigments analyses. (C) 2014 Elsevier B.V. All rights reserved.
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