Development of two reference materials for all trans-retinol, retinyl palmitate, alpha- and gamma-tocopherol in milk powder and infant formula

作者：Shehata Adel B; Rizk Mahmoud S; Farag Ahmad M; Tahoun Ibrahim F^*

来源：Journal of Food and Drug Analysis, 2015, 23(1): 82-92.

DOI：10.1016/j.jfda.2014.10.004

• certification
• infant formula
• milk powder
• reference materials
• statistical analysis
• vitamins

Vitamins are important food constituents that can be present in almost every foodstuff. Food quality and safety depends on food surveillance by reliable quantitative analysis enabled by appropriate quality control. Certified matrix reference materials are versatile tools to support quality assurance and control. However, in the case of vitamins, which are important in various foods, there is a lack of matrix reference materials. Two certified reference materials for the determination of all trans-retinol, retinyl palmitate, and alpha- and gamma-tocopherol in milk powder and infant formula have been developed by the National Institute of Standards, Egypt. This article presents the preparation, characterization, homogeneity, and stability testing as well as statistical treatment of data and certified value assignment. The assignment of the certified values and associated uncertainties in the prepared natural-matrix reference materials were based on the widely used approach of combining data from independent and reliable analytical methods.

• 出版日期2015-3