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Determination of Microelements in Human Milk and Infant Formula Without Digestion by ICP-OES

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Authors
Đurović, Dijana
Milisavljevic, Branka
Nedovic-Vukovic, Mirjana
Potkonjak, Branislav
Spasić, Snežana
Vrvić, Miroslav
Article (Published version)
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Abstract
The concentrations of zinc (Zn), iron (Fe) and copper (Cu) in both human milk and infant formula were determined using a new sample preparation method, by inductively coupled plasma -optical emission spectometry (ICP-OES) and flame atomic absorption spectrometry (FAAS). Human milk samples were diluted in ultrapure water. The infant formula of powder samples (suitable for an infant 1-6 months of age) and standard reference material (SRM-1849) were analyzed in parallel. The results have shown that FAAS method was more sensitive for Fe determination in human milk while ICP-OES was more sensitive for both Zn and Cu detection. The limit of quantification for both Zn and Cu was 5 mu g L-1 and 10 mu g L-1 for Fe and the recovery for Zn, Fe and Cu was ranged from 90% to 94%, 97% to 103% and 90% to 102%, respectively. Mean concentrations of Zn, Fe, and Cu in human milk samples were 5.35, 0.47 and 0.83 mg L-1, respectively while these values in infant formula were ranged from 3.52-4.75 mg L-1, 3....37-4.56 mg L-1 and 0.28-0.41 mg L-1, respectively. Despite the sample complexity, the proposed method using dilution of milk samples with water was simple, rapid, effective and accurate. ICP-OES was a better method for Zn determination while FAAS was a better method for Fe determination. In the case of Cu both methods were comparable.

Keywords:
Microelements / human milk / method validation / sample preparation
Source:
Acta Chimica Slovenica, 2017, 64, 2, 276-282
Publisher:
  • Slovenian Chemical Society
Projects:
  • Simultaneous Bioremediation and Soilification of Degraded Areas to Preserve Natural Resources of Biologically Active Substances, and Development and Production of Biomaterials and Dietetic Products (RS-43004)

DOI: 10.17344/acsi.2016.2582

ISSN: 1318-0207

PubMed: 28621407

WoS: 000405558200003

Scopus: 2-s2.0-85020856021
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/2055
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