【摘要】 建立了电感耦合等离子体质谱(ICP-MS)法测定帕立骨化醇(1)中铅(Pb)、镉(Cd)、汞(Hg)、砷(As)、钴(Co)、钒(V)、镍(Ni)、锂(Li)、锑(Sb)、铜(Cu)、铬(Cr)11种元素杂质的含量。采用微波消解法对样品进行前处理，以铋(Bi)、锗(Ge)和钪(Sc)为内标，采用动能甄别(KED)碰撞模式，玻璃同心雾化器进样，射频正向功率为1 300 W，雾化气流速为0.8 L/min，等离子体气流速为15.0 L/min，辅助气流速为1.2 L/min。结果显示，11种待测元素在25%～200%浓度范围内线性关系良好；定量限在0.007～2.023 ng/mL；平均加样回收率(n=9)在86.0%～104.9%；重复性试验RSD(n=6)均≤2.3%。建立的方法准确且灵敏度高，可用于1中11种元素杂质的痕量控制。更多还原

【Abstract】 An ICP-MS method was established to determine the contents of eleven elemental impurities,including lead(Pb),cadmium(Cd),mercury(Hg),arsenic(As),cobalt(Co),vanadium(V),nickel(Ni),lithium(Li),antimony(Sb),copper(Cu),and chromium(Cr),in paricalcitol(1).The sample was pretreated by microwavedigestion method,with bismuth(Bi),germanium(Ge),and scandium(Sc) as internal standards.The kinetic energydiscrimination(KED) collision mode was used,and the sample was injected into a glass concentric atomizer.The radiofrequency forward power was 1 300 W,the atomization gas flow rate was 0.8 L/min,the plasma gas flow rate was 15.0 L/min,and the auxiliary gas flow rate was 1.2 L/min.The results showed that it was linear for above eleven elementalimpurities in the concentration range of 25%-200%.The quantification limits were 0.007-2.023 ng/mL,theaverage sample recoveries(n=9) were 86.0%-104.9%,and RSDs(n=6) in the repeatability test were less than 2.3%.The established method is accurate and highly sensitive,which can be used for the trace control of eleven elemental impurities in 1.更多还原