电感耦合等离子体质谱法比较不同制粉方式对玉米中重金属含量的影响

Comparison of the effects of different milling methods on the content of heavy metals in maize by inductively coupled plasma mass spectrometry method

中文关键词:  电感耦合等离子体质谱法  制粉方式  玉米  重金属元素

英文关键词:inductively coupled plasma mass spectrometry  pulverizing way  maize  heavy metal

中文摘要:

      目的 利用微波消解-电感耦合等离子体质谱法比较不同制粉方式对玉米中As、Pb、Hg、Cd、Cr、Cu、Ni 7种重金属元素含量的影响。方法 以玛瑙研钵处理样品为对照, 用实验室常用的3种金属前处理设备福斯旋风磨、破壁料理机、万能粉碎机对玉米进行粉碎, 微波消解样品, 用电感耦合等离子体质谱法测定7种重金属元素含量。结果 在0.1~50.0 μg/mL线性范围内, 方法线性关系良好(r2>0.9990)。3种前处理方式对玉米的重金属Hg和Cd含量检测无影响, 均会造成Cr含量的增加, 万能粉碎机会造成金属Ni含量的显著增加(P<0.05)。结论 3种前处理方式中破壁料理机对于对玉米的重金属含量检测产生的影响最小。

英文摘要:

      Objective To compare the effects of different milling methods on the contents of heavy metal including As, Pb, Hg, Cd, Cr, Cu and Ni in maize samples by microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS). Methods Taking the samples treated with agate mortar as the control, the maize was crushed by 3 kinds of commonly used metal pretreatment equipment including flowserve cyclone mill, wall breaking blender and universal grinder. Then, the samples were digested by microwave, and the contents of 7 heavy metals were determined by inductively coupled plasma mass spectrometry. Results In the linear range of 0.1-50.0 μg/mL, the method has a good linear relationship (r2>0.9990). Three pretreatment methods had no effect on the detection of heavy metal Hg and Cd content in corn, and all of them resulted in the increase of Cr content. The universal crushing machine results in a significant increase in the Ni content (P<0.05). Conclusion Among the 3 pretreatment methods, the effect of wall breaking blender on the detection of heavy metal content in corn was the least.