China Dairy ›› 2021, Vol. 0 ›› Issue (7): 91-97.doi: 10.12377/1671-4393.21.07.18

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Uncertainty Evaluation for the Determination of Folic Acid in Infant Formula by Microbiological Methods

WU SiMin, YAN JiaJun*, HUANG ZhongBiao   

  1. Guangdong Testing Institute of Product Quality Supervision, Foshan Guangdong 528300
  • Online:2021-07-25 Published:2021-08-10

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Abstract: To evaluate the uncertainty for determination of folic acid in infant formula by microbiological method. According to GB 5009.211—2014 National food safety standard-Determination of folic acid in food and relevant evaluation criteria of uncertainty and relevant statistical methods,the uncertainty components affecting folic acid content results in infant formula food were analysed and evaluated.The content of folic acid in infant formula was (148.49±7.37)μg/100g,k=2.It was found that the preparation process of standard solution and the preparation process of sample solution were the main factors affecting the test results.The deviation of instrument measurement, repeatability and test methods were secondary factors.The microbiological determination method of folic acid in infant formula has low uncertainty,It can be used for the determination of folic acid in infant formula.

Key words: microbial method, folic acid, infant formula, uncertainty

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