Determination of metals in composite diet samples by inductively coupled plasma-mass spectrometry.
A study was conducted to evaluate the applicability of inductively coupled plasma-mass spectrometry (ICP-MS) techniques for determination of metals in composite diets. Aluminum, cadmium, chromium, copper, lead, manganese, nickel, vanadium, and zinc were determined by this method. Atmospheric pressure microwave digestion was used to solubilize analytes in homogenized composite diet samples, and this procedure was followed by ICP-MS analysis. Recovery of certified elements from standard reference materials ranged from 92 to 119% with relative standard deviations (RSDs) of 0.4-1.9%. Recovery of elements from fortified composite diet samples ranged from 75 to 129% with RSDs of 0-11.3%. Limits of detection ranged from 1 to 1700 ng/g; high values were due to significant amounts of certain elements naturally present in composite diets. Results of this study demonstrate that low-resolution quadrupole-based ICP-MS provides precise and accurate measurements of the elements tested in composite diet samples.
U.S. Environmental Protection Agency, 26 W. Martin Luther King Dr, Cincinnati, OH 45268, USA. melnyk.lisa@epa.gov
Lisa Jo
LJ
Melnyk
Jeffrey N
JN
Morgan
Reshan
R
Fernando
Edo D
ED
Pellizzari
Olujide
O
Akinbo
D000818:Animals; D001628:Beverages / Q000032:analysis; D002138:Calibration; D002417:Cattle; D005504:Food Analysis; D006868:Hydrolysis; D007202:Indicators and Reagents; D008099:Liver / Q000737:chemistry; D013058:Mass Spectrometry; D008670:Metals / Q000032:analysis*; D012015:Reference Standards
D007202:Indicators and Reagents; D008670:Metals