建立了用带八极杆碰撞/反应池的电感耦合等离子体质谱仪(ORS-ICP-MS)测定食品添加剂食用纯碱中Mg,Al,K,Ca,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Se,Mo,Cd,Ba,Hg,Pb等18种微量元素的方法。采用八极杆碰撞/反应池技术,有效地消除了多原子离子对待测元素的干扰,确定了试验的最佳测定条件。结果表明,各元素的检出限在0.002～0.209μg/g之间,加标回收率在91.0%～108.4%之间,相对标准偏差(RSD)小于2.77%。 The determination of Mg, Al, K, Ca, V, Cr, Mn, Fe, Ni and Cu in food additives soda ash by ICP-MS with octopole collision / reaction cell , Zn, As, Se, Mo, Cd, Ba, Hg, Pb and other 18 kinds of trace elements. The octopole collision / reaction cell technology is used to effectively eliminate the interference of polyatomic ions on the elements to be tested, and the optimum test conditions are determined. The results showed that the detection limits of each element ranged from 0.002 to 0.209 μg / g, the spiked recoveries ranged from 91.0% to 108.4%, and the relative standard deviations (RSDs) were less than 2.77%.