Silicon determination in milk by electrothermal atomic absorption spectrometry using palladium as chemical modifier

A direct method for silicon determination in milk samples by Electrothermal Atomic Absorption Spectrometry was developed. Palladium was used as chemical modifier at a concentration of 610 mg L(-1); with this modifier, silicon was stable up to 1800 degrees C. The precision and accuracy of the method...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2002-12, Vol.374 (7-8), p.1290-1293
Main Authors: Bermejo-Barrera, P, Barciela-Alonso, M C, Domínguez-González, R, Bermejo-Barrera, A, Cocho De Juan, J A, Fraga-Bermúdez, J M
Format: Article
Language:English
Subjects:
Absorption
Absorption spectroscopy
Animals
Atomic absorption analysis
Atomic absorption spectroscopy
Breast milk
Cattle
Cow's milk
Dairy cattle
Humans
Infant Food - analysis
Infant, Newborn
Infants
Milk
Milk - chemistry
Palladium
Palladium - chemistry
Reproducibility of Results
Sensitivity and Specificity
Silicon
Silicon - analysis
Spectral analysis
Spectrometry
Spectrophotometry, Atomic - methods
Temperature
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Summary:A direct method for silicon determination in milk samples by Electrothermal Atomic Absorption Spectrometry was developed. Palladium was used as chemical modifier at a concentration of 610 mg L(-1); with this modifier, silicon was stable up to 1800 degrees C. The precision and accuracy of the method were investigated. The detection limit was 16.2, 2.7 and 7.2 micro g L(-1) for cows' milk, human milk and infant formula, respectively. The method was applied to silicon determination in 17 infant formula samples, 13 human milk samples and 12 cows' milk samples.
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-002-1632-0