食品科学 ›› 2010, Vol. 31 ›› Issue (2): 117-119.doi: 10.7506/spkx1002-6630-201002028

• 工艺技术 • 上一篇    下一篇

奶粉中肌醇的气相色谱-质谱法测定

罗海英,冼燕萍,郭新东* ,杜志峰,彭 莺,吴玉銮   

  1. 广州市质量监督检测研究院,国家加工食品质量监督检验中心(广州)
  • 收稿日期:2009-02-04 修回日期:2009-08-28 出版日期:2010-01-15 发布日期:2010-12-29
  • 通讯作者: 郭新东 E-mail:gdone@21cn.com
  • 基金资助:

    广东省科技计划项目(2007B080401015)

GC-MS Determination of Inositol in Milk Powder

LUO Hai-ying,XIAN Yan-ping,GUO Xin-dong*,DU Zhi-feng,PENG Ying,WU Yu-luan   

  1. (Guangzhou Quality Supervision and Testing Institute, National Centre for Quality Supervision and Testing of Processed Food
    (Guangzhou), Guangzhou 510110, China)
  • Received:2009-02-04 Revised:2009-08-28 Online:2010-01-15 Published:2010-12-29
  • Contact: GUO Xin-dong*, E-mail:gdone@21cn.com

摘要:

建立奶粉中肌醇的气相色谱- 质谱分析方法。样品以水溶解,肌醇经硅烷化衍生处理、正己烷提取、弗罗里硅土柱净化后,以气相色谱- 质谱检测和确认。在1.0~10.0mg/kg 添加水平范围内,回收率在88.4%~102.5%之间,变异系数在2.7%~4.7% 之间。以RSN=3 计算,方法最低检出限为0.5mg/kg。结果表明,该法简便、灵敏、准确,适用于奶粉中肌醇含量的分析。

关键词: 肌醇, 奶粉, 气相色谱-质谱法

Abstract:

A GC-MS method was developed for determining inositol in milk powder. Samples were dissolved in water, silylated, and extracted with n-hexane. The extract obtained was cleaned up using a Florisil column before GC-MS analysis. At fortification levels ranging 1.0-10.0 mg/kg, the recoveries of inositol ranged from 88.4% to 102.5%, and the coefficients of variation were between 2.7% and 4.7%. The limit of detection was calculated to be 0.5 mg/kg (RSN = 3). This method, thanks to its simpleness as well as high sensitivity and accuracy, can meet the requirements for qualification and quantification of inositol in milk powder.

Key words: inositol, milk powder, GC-MS

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