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Uncertainty Evaluation for the Determination of Cholecalciferol in Infant Formula Milk Powder by Ultra Performance Liquid Chromatography

FAN Yao,HUANG Cui-li,WANG Li-qing,REN Guo-pu,ZHOU Gui-ping,CHEN Hong-tao   

  1. 1. College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;
    2. Guangdong Testing Institute for Product Quality Supervision, Foshan 528300, China;
    3. School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
  • Online:2013-06-25 Published:2013-06-17

Abstract:

Based on JJF 1059—1999 Evaluation of the Uncertainty of Determination and Expression, a mathematical model
was established to assess the uncertainty of analyzing cholecalciferol (VD3) in infant milk powder by ultra performance
liquid chromatography (UPLC). Factors contributing to the uncertainty were analyzed, quantified and synthesized. The
expanded uncertainty of VD3 determination for 10.0 g of samples was 0.2091 μg. Our results showed that the uncertainty
of measurement was mainly caused by the preparation of standard solution, the establishment of the standard curve and the
uncertainty of stochastic factors during the determination of samples. The evaluation method is reasonable, clear, simple,
accurate, and suitable for the evaluation of uncertainty in UPLC determination.

Key words: ultra-performance liquid chromatography, infant formula milk powder, cholecalciferol, uncertainty evaluation