食品科学 ›› 2011, Vol. 32 ›› Issue (2 ): 157-163.doi: 10.7506/spkx1002-6630-201102037

• 分析检测 • 上一篇    下一篇

应用流式细胞技术快速检测液态商品中的细菌总数

刘道亮,赵占民,胡连霞,张峻峰,孙晓霞   

  1. 河北出入境检验检疫局
  • 收稿日期:2010-03-02 修回日期:2010-11-29 出版日期:2011-01-25 发布日期:2011-01-10
  • 通讯作者: 胡连霞 E-mail:hulianxia168@tom.com
  • 基金资助:

    国家质检总局项目(2009IK174)

Rapid Determination of Total Bacterial Number in Liquid Foods by A Flow Cytometry Method

IU Dao-liang,ZHAO Zhan-min,HU Lian-xia,ZHANG Jun-feng,SUN Xiao-xia   

  1. Hebei Entry-exit Inspection and Quarantine Bureau, Shijiazhuang      050051, China
  • Received:2010-03-02 Revised:2010-11-29 Online:2011-01-25 Published:2011-01-10
  • Contact: HU Lian-xia E-mail:hulianxia168@tom.com

摘要: 建立应用流式细胞技术(flow cytometry,FCM)快速检测液态商品牛奶、果汁中的细菌总数的方法。采用膜过滤、离心技术对果汁样品进行前处理,去除影响FCM 检测的基质颗粒,使样品达到FCM 可检测状态,检测限达到101CFU/mL 数量级。对液态商品牛奶进行重复性和验证实验,检测结果经Q 检验法和方差分析,在一定范围浓度下,FCM 检测液态商品中的细菌总数与平板法成线性相关。FCM 是一种比平板法检测细菌总数更加快速、准确的方法。

关键词: 流式细胞技术, 检测, 细菌总数, 液态商品

Abstract: The total numbers of bacteria in liquid foods such as milk and fruit juice were determined by a flow cytometry (FCM) method. A detection limit of 10 CFU/mL was achieved by removing the non-microorganism particles in fruit juice through membrane filtration and centrifugation. The reproducibility was tested to verify the reliability of the method in determining milks by comparing with the standard plate count (SPC) method. The FCM result was linearly correlated with that of SPC within a certain concentration range. FCM is faster and more accurate than SPC methods in determining the total number of bacteria in liquid samples.

Key words: flow cytometry method, total bacterial number, liquid foods

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