GFAAS determination of selenium in infant formulas using a microwave digestion method.
A method for determining the selenium content of infant formulas is proposed. It includes wet digestion with nitric acid and hydrogen peroxide in medium pressure teflon bombs in a microwave oven and determination by graphite furnace atomic absorption spectrometry (GFAAS). The absence of interferences is checked. Values obtained for the limit of detection (19.4 ng/g), precision (RSD = 2.2%) and accuracy by analysis of a reference material show that the method is reliable.
Alegria
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Department of Nutrition and Food Chemistry, University of Valencia, Spain.
Barbera
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Farré
R
R
Moreno
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D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry; D007223:Infant; D007225:Infant Food / Q000032:analysis*; D008274:Magnesium / Q000737:chemistry; D008872:Microwaves; D017942:Nitric Acid / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D012643:Selenium / Q000032:analysis*; D013054:Spectrophotometry, Atomic
D017942:Nitric Acid; D010165:Palladium; D006861:Hydrogen Peroxide; D012643:Selenium; D008274:Magnesium