The simultaneous analysis of eight essential trace elements in human milk by ICP-MS

Mohd Taufek, Nor Hidayah and Cartwright, David William and Davies, Mark W. and Hewavitharana, Amitha K and Koorts, Pieter J. and Shaw, Paul Nicholas and Sumner, Ronald and Lee, Eugene and Whitfield, Karen M. (2016) The simultaneous analysis of eight essential trace elements in human milk by ICP-MS. Food Analytical Methods, 9 (7). pp. 2068-2075. ISSN 1936-9751 E-ISSN 1936-976X

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Abstract

Trace elements are commonly present as components of metabolic enzymes, hormones and antioxidants in human milk. Previous studies have reported single or few elements in relatively large volumes of human milk using complex, time-consuming and expensive methods involving microwave-assisted acid digestion and extraction using tetramethylammonium hydroxide at various temperatures. We report here a validated alkaline dissolution method using ethylenediaminetetraacetic acid, ammonia solution, isopropanol and Triton X-100 to simultaneously determine trace elements in 0.2 mL samples of human milk by inductively coupled plasma mass spectrometry (ICP-MS). The trace elements zinc (Zn), copper (Cu), selenium (Se), manganese (Mn), iodine (I), iron (Fe), molybdenum (Mo), bromine (Br), chromium (Cr), cobalt (Co), lead (Pb), nickel (Ni), silver (Ag), cadmium (Cd), arsenic (As), bismuth (Bi), aluminium (Al),antimony (Sb), vanadium (V), thallium (Tl) and uranium (U)were detected, and the method was applied quantitatively to 12 samples of human milk. The results for method validation showed good sensitivity, accuracy and repeatability for Zn, Cu, Se, Mn, I, Fe, Mo and Br. The mean±SD of these elements in the above human milk samples (μg/L) were 1390.6 ± 211.5, 220.8 ± 32.9, 14.3 ± 5.8, 1.37 ± 0.14, 113.5 ± 17.1, 47.3± 99.9, 0.37± 0.12 and 812.6 ± 127.7, respectively. This method is precise, reliable, straightforward and cost effective in the determination of trace elements simultaneously in small sample volumes of human milk. Method application permits routine monitoring of several elements and the ongoing assessment of trace element nutrition in breast milk. It is the first method to highlight the relatively high Br levels present in human milk

Item Type:	Article (Journal)
Additional Information:	6410/56676
Uncontrolled Keywords:	Human milk; ICP-MS; Method validation; Trace elements
Subjects:	R Medicine > RS Pharmacy and materia medica
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Pharmacy
Depositing User:	Nor Hidayah Mohd Taufek
Date Deposited:	25 Apr 2017 15:16
Last Modified:	23 Oct 2017 12:44
URI:	http://irep.iium.edu.my/id/eprint/56676

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