Multi Element Simultaneous Analysis of Toxic Metals in Cat Foods, Using ICP-MS

Terachi T., Nishiura M., Funaba M., Matsui T.

doi:10.11266/jpan.16.13

We established the simultaneous analysis of toxic metals in commercial cat foods. The present study examined 27 elements (Li·B·Al·Ti·V·Cr·Mn·Fe·Co·Ni·Cu·Zn·Ge·As·Se·Rb·Sr·Mo·Ag·Cd·Sn·Sb·Ba· W·Hg·Pb·Bi), considered as potentially toxic metals, by Inductive Coupled Plasma-Mass Spectrometry (ICP-MS), using a semi quantitative analytical mode. The coefficients of variation (CV) were below 10% in all detectable elements and that the recoveries of spiked sample were between 70 to 120% in 15 elements (Li·Al·V·Mn·Co·Cu·As·Se·Rb·Sr·Mo·Cd·Sn·Hg·Pb) in the analyses of pooled commercial dry foods and wet foods. Quantitative values in these 15 elements also showed the significant (r² > 0.9) regression with semi quantitative values. Although six elements (B·Ti·Fe·Zn·Sb·Ba) also showed the significant regression between quantitative values and semi quantitative values, the recoveries of spiked sample were below 70 or above 120%. Three elements (Cr·Ni·Ge) did not show the significant regression between quantitative values and semi quantitative values, or under detectable limit. However these 3 elements were detectable at each maximum tolerable level. The present results suggest that the semi quantitative analysis could match wide range of toxic metals. Therefore it is useful as a screening method for toxic metals in cat foods.

Multi Element Simultaneous Analysis of Toxic Metals in Cat Foods, Using ICP-MS

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