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投稿时间:2016-07-26
投稿时间:2016-07-26
中文摘要: 建立了利用高效液相色谱(HPLC)-二极管阵列检测器(PDA)法测定食品中苏丹红Ⅲ的方法。采用的色谱条件 为:Symmetry C18 色谱柱(4.6 mm× 250 mm,5 μm),用乙腈-丙酮(80-20):水=95 ∶ 5 作为流动相,检测波长为 504 nm,流动 相流速为 1.0 mL/min,柱温为 15 ℃。利用色谱检测苏丹红Ⅲ的浓度在 0.03 μg/mL~101.86 μg/mL 时,组分的峰面积与浓度 之间线性关系良好,苏丹红Ⅲ的线性方程为 A=26 310ρ-911.78(ρ:μg/mL),R2=0.999 2。该方法精密度良好,稳定性较强。 检测的 4 种样品的加标回收率在 97.33 %~100.00 %之间,符合测定要求。高效液相色谱法,方法准确,快速,适用于苏丹 红Ⅲ的测定。通过质谱,进一步验证了食品中苏丹红Ⅲ的存在。利用质谱检测到,苏丹红Ⅲ的分子离子峰为 m/z 353,主 要碎裂成 m/z 156 和 m/z 197。
Abstract:A HPLC-PDA method was established for determination of trace Sudan Ⅲ in foodstuffs. The chro- matographic conditions were: Symmetry C18 column (4.6 mm×250 mm, 5 μm) was used with mobile phases composed of acetonitrile- acetone (80-20):water=95 ∶ 5, under the detection wavelength for 504 nm, 1.0 mL/min as the flow rate, column temperature 15 ℃. The peak area and the concentration of Sudan Ⅲ showed a good lin- ear relationship: A=26 310ρ-911.78(ρ:μg/mL), R2=0.999 2, in the range of 0.03 μg/mL-101.86 μg/mL. The above method precision was good and stability was strong. The adding standard recoveries of four kinds of sam- ples were between 97.33 % -100.00 % , according with the requirement of the determination. HPLC -PDA method was accurate and fast and it could be used for the determination of Sudan Ⅲ. To further validate the ex- istence of Sudan Ⅲ in these samples by mass spectrometry. Mass spectrometry showed that Sudan Ⅲ molecular ion peak was m/z 353, main cracked into m/z 156 and m/z 197.
文章编号:201708031 中图分类号: 文献标志码:A
基金项目:忻州师范学院青年基金项目(QN201519);忻州师范学院 应用化学创新实践基地(2013-31)
Author Name | Affiliation |
GAO Rui-yuan, WU Le-chen, ZHANG Hai-rong | Laboratory of Biochemical Analysis, Xinzhou Teachers' College, Xinzhou 034000, Shanxi, China |
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