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Estimating the daily intake of essential and nonessential elements from lamb m. longissimus thoracis et lumborum consumed by the population in Missouri (United States)
Affiliation:1. CSIRO, 1 Technology Court, Pullenvale, Qld 4069, Australia;2. University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
Abstract:This paper estimated the daily intake of essential and nonessential elements from lamb muscle longissimus thoracis et lumborum (m. LTL) available to the population in Missouri. Missouri grain-finished (n = 36), Missouri grass-finished (n = 40) and imported New Zealand grass-finished (n = 40) lamb m. LTL were purchased and assayed for their element composition. Total mercury in samples was quantified by atomic absorption spectrometry and other elements were analyzed by inductively coupled plasma-optical emission spectrometry. Analysis of certified reference materials (DORM-2 and TORT-2) gave recovery rates ranging from 86 to 108% and 85 to 104%, respectively. The abundance of essential elements in Missouri grain-finished and Missouri grass-finished lamb m. LTL followed the order: Potassium > phosphorus > sodium > magnesium > calcium > zinc > iron. The order in the imported New Zealand grass-finished group was: Potassium > phosphorus > sodium > calcium > magnesium > zinc > iron. Since many variables lacked normality, non-parametric (Kruskal–Wallis) comparison test was performed and the results suggested no significant difference (P > 0.05) in element composition among the lamb m. LTL groups. The estimated daily intake of 14 elements from consumption of 100 g lamb m. LTL posed no hazard to consumers.
Keywords:Essential elements  Nonessential elements  Daily intake  Permissible tolerable weekly intake  Inductively coupled plasma-optical emission spectrometer (ICP-OES)  Direct mercury analyzer (DMA)  Food composition  Food analysis  Food safety
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