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Publication
Quality control materials development for proximate composition determination in baby foods to enhance the Portuguese food composition database: Packaging conditions
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Advisor(s)
Abstract(s)
Food matrix reference materials play an important role in the quality of data used in food composition
databanks concerning the precision, trueness and accuracy of analytical values. In this work the
feasibility studies according to ISO 34 (ISO, 2000) of two commercial baby foods (ready-to-eat baby soup
and milk-based powdered infant formula) were evaluated to check for their suitability as quality control
materials for the analysis of moisture, protein, fat, ash and acidity. The suitability of plastic packaging
materials to guarantee the reference materials’ characteristics is discussed. Official methods of analysis
were used to evaluate the homogeneity and to monitor short-term and long-term stability studies.
ANOVA was carried out to confirm homogeneity within and between samples. ISO 34 method was
applied to monitor stability at different temperatures. The coefficients of variation obtained between
sachets for milk-based powdered infant formula were less than 4.4% for moisture and 0.5% for fat. The
stability data over 8.5 months storage period at 20 8C, 5 8C and 20 8C and 70 8C indicate that both
materials are stable depending on the parameter studied and temperature. According to results, quality
control materials (QCMs) prepared in agreement with ISO 34 requirements are a valuable tool in food
composition analysis.
Description
Keywords
Reference materials Quality control materials QCM Certified reference materials CRM Foodstuffs Data quality EuroFIR Food composition database Infant formula Food contact materials Homogeneity Stability Food data management Segurança Alimentar
Pedagogical Context
Citation
J Food Comp Anal. 2010;23(8):828–36