食品科学 ›› 2013, Vol. 34 ›› Issue (22): 269-272.doi: 10.7506/spkx1002-6630-201322054

• 分析检测 • 上一篇    下一篇

高效液相色谱-质谱法同时测定婴幼儿配方奶粉中叶酸、VB12和生物素

王凤玲,刘爱国,孙佳佳,彭 诚   

  1. 天津商业大学生物技术与食品科学学院,天津市食品生物技术重点实验室,天津 300134
  • 收稿日期:2013-02-01 修回日期:2013-10-10 出版日期:2013-11-25 发布日期:2013-12-05
  • 通讯作者: 王凤玲 E-mail:wfling@tjcu.edu.cn

Simultaneous Determination of Folic Acid, Vitamin B12 and Biotin in Infant Formula by HPLC-MS-MS

WANG Feng-ling,LIU Ai-guo,SUN Jia-jia,PENG Cheng   

  1. Tianjin Key Laboratory of Food and Biotechnology, College of Biotechnology and Food Science,Tianjin University of Commerce, Tianjin 300134, China
  • Received:2013-02-01 Revised:2013-10-10 Online:2013-11-25 Published:2013-12-05
  • Contact: WANG FengLing E-mail:wfling@tjcu.edu.cn

摘要:

建立高效液相色谱-质谱法对婴幼儿配方奶粉中叶酸、VB12和生物素同时定性和定量分析方法。采用等电点沉淀(pH1.90/4.70)法提取样品,SB-Aq(2.1mm×100mm,1.8μm)色谱柱分离,0.1%(V/V)甲酸溶液和乙腈作流动相,等度(16.5:83.5,V/V)洗脱,质谱MRM检测。结果表明:叶酸、VB12和生物素在5min内得到很好的分离。线性范围分别为3.5~250ng/mL、0.8~5.0ng/mL、0.7~50ng/mL,加样回收率平均值分别为97.8%、102.3%、96.9%,RSD分别为1.33%、0.9%、1.37%。该方法具有较好的精密度和准确性、灵敏度高、操作简单快速,可以应用于婴幼儿配方奶粉中叶酸、VB12和生物素的含量同时测定。

关键词: 叶酸, VB12, 生物素, 等电点沉淀, 高效液相色谱-质谱

Abstract:

A method using high performance liquid chromatography tandem mass spectrometry (HPLC-MS-MS) for
simultaneous determination of folic acid, vitamin B12 and biotin in infant milk power was presented. Samples were
sequentially extracted and then subjected to isoelectric precipitation (pH 1.90/4.70). The analysis was carried out on an
SB-Aq column (2.1 mm × 100 mm, 1.8 μm) with isocratic elution using a mobile phase made up of 0.1% (V/V) aqueous
formic acid and acetonitrile (16.5:83.5, V/V). The analytes were detected in the MRM mode. Folic acid, vitamin B12 and
biotin in samples could be separately well within 5 min. The calibration curves were linear over the concentration range of
3.5 - 250 ng/mL for folic acid, 0.8 - 5 ng/mL for vitamin B12, and 0.7 - 50 ng/mL for biotin. The average recovery rates
were 97.8%, 102.3% and 96.9%, with RSD of 1.33%, 0.9% and 1.37% for folic acid, vitamin B12 and biotin, respectively.
The developed method is precise, accurate, sensitive, fast and simple, which can thereforebe applied for the analysis of folic
acid, vitamin B12 and biotin in infant formula.

Key words: folic acid, vitamin B12, biotin, high performance liquid chromatography tandem mass spectrometry (HPLCMS-MS), isoelectric precipitation

中图分类号: