学术
包装食品中脂肪含量的分析和变化范围的研究
何梅[1] 满青青[1] 虞爱旭[2] 马永民[3] 王小凡[2] 杨月欣[1]
[1]中国疾病预防控制中心营养与食品安全所,北京100050 [2]杭州疾病预防控制中心,北京100050 [3]天津市疾病预防控制中心,北京100050
摘 要:
目的研究不同实验室对包装食品中脂肪检测的实验误差。方法根据2000年全国包装食品消费的调查,选择了7类（谷物、豆类、肉类、奶制品类、饮料类、坚果、休闲食品）13种包装食品,在全国的7家实验室进行3次脂肪的平行样检测,脂肪检测方法为国家标准方法。结果所有脂肪检测结果筛查合格率为93.4%。脂肪检测精密度为：实验室内变异系数1.89%～5.39%,实验室间2.64%～24.14%,室内和室间总和为3.32%到24.60%,平均11.51%。除脂肪含量非常低的鱼罐头和脱脂奶粉外,脂肪检测的相对扩展不确定度由6.48%到34.80%,平均17.62%。结论中国实验室内对脂肪的检测符合国家标准方法的要求。如果重点考虑中高脂肪含量的食品,则总的实验室不确定度可以控制在20%内。[著者文摘]
文章出处:
《卫生研究》-2007年36卷5期 -544-546页
栏目信息:
文献标识码:
A
文章编号:
1000-8020（2007）05-0544-03
Laboratory analysis and its variety of fat in prepackaged foods
HE Mei, MAN Qingqing, YU Aixu, MA Yongmin, et al. （Institute of Nutrition and Food Satety, China CDC, Beijing 100050, China）
Abstract:
Objective To observe the variety of fat analysis of prepackaged foods from different labs of China. Methods Thirteen foods from seven kinds were selected as food samples： cereal products, bean products, meat products, dairy products, beverages, nuts, snacks, according to national prepackaged foods consumption survey results in 2000. The sample fat contents were analyzed parallelly for three times by national standard methods in seven labs from all the country. Results The 93.4% of results were up to grade by Grubbs, Cochran and Dixon screening methods. The accuracy of fat analysis was expressed by variety coefficiency （ C. V% ）. The C. V% of inner labs and inter labs were from 1.89% to 5.39% and from 2.64% to 24.14%, the total and average C. V% level were from 3.32% to 24.60% and 11.51 % . Besides the fish tin and fat-free milk powder （with very low fat content）, the relative expanded uncertainties of fat detection were from 6.48 % to 34.80 % （average 17.62 % ）. Conclusion Fat analysis level in labs from all the country was fit for national standards. If fat labeling were focused on its middle and high content prepa, kaged foods, the uncertainty of analysis should be controlled in 20% .[著者文摘]
Key words:
prepackaged food, fat, variety and uncertainty, laboratory analysis
基金资助:
达能营养中心膳食营养研究与宣教基金（No.DIC2004-01）;中国营养学会“营养科研基金”2006年项目
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