微波消解-ICP-OES/ICP-MS测定婴幼儿罐装辅食泥中的16种元素

探究了微波消解-ICP-OES/ICP-MS测定婴幼儿罐装辅食泥中的钾、钠、钙、磷、镁、铁、铜、锰、锌、铝、铬、镍、砷、镉、汞、铅16种元素的方法。优化了仪器条件,各元素线性关系均在0.999 7以上且线性范围宽。利用建立的方法测定了20份辅食泥样品,并进行了加标回收试验,样品的加标回收率为88.5%～106.0%,RSD范围为1.46%～8.18%,重现性的平均相对标准偏差为1.8%～7.1%(n=8)。该方法能够满足测定婴幼儿罐装辅食泥样品中的多种金属元素的要求。

Determination of 16 elements in canned food paste for infant by microwave digestion coupled with ICP-OES/ICP-MS

Sixteen elements (K, Na, Ca, P, Mg, Fe, Cu, Mn, Zn, Al, Cr, Ni, As, Cd, Hg and Pb) in canned food paste for infant were determined by ICP-OES/ ICP-MS after microwave digestion. Under the optimized conditions, the calibration curves for 16 elements were wide and correlation coefficients were greater than 0.999 7. Twenty samples were determined by the proposed method and the spiked recoveries were in the range of 88.5%~106.0%, the relative standard deviations were 1.46%~8.18% while the RSD ranges from 1.8% to 7.1% (n=8). The method provides the basis for scientific evaluation of the nutritional value and food safety risk of the supplement mud.