Simultaneous Determination of 21 Inorganic Elements in Hypericum japonicum by ICP-MS / 中国药房

ABSTRACT

OBJECTIVE:To establish the method for simultaneous determination of 21 inorganic elements in Hypericum japoni-cum. METHODS:ICP-MS method was adopted. The power was 1300 W;flow rate of cooling gas was 1.5 L/min;flow rate of carrier gas was 0.8 L/min;flow rate of auxiliary gas was 0.2 L/min;integration time was 10 s;delay time of 1 s;repetition times was one time;measurement mode was standard curve method. SPSS 16.0 statistical software was used for relationship analysis and main component analysis. RESULTS:The linear range of iron,magnesium,calcium,aluminum,potassium,sodium,zinc,co-balt,nickel,barium,manganese,phosphorus,selenium,titanium,strontium,copper,arsenic,cadmium,chromium,lead,mer-cury were 50-250 μg/mL(r=0.9972),25-100 μg/mL(r=0.9989),25-100 μg/mL(r=0.9977),2.5-15 μg/mL(r=0.9996), 25-150 μg/mL(r=0.9991),2.5-15 μg/mL(r=0.9999),2.5-10 μg/mL(r=0.9999),2.5-10 μg/mL(r=0.9999),2.5-10 μg/mL(r=0.9999),2.5-10 μg/mL(r=0. 0.9999),2.5-10 μg/mL(r=0.9998),2.5-10 μg/mL(r=0.9996),0.5-2 μg/mL(r=0.9995),2.5-10μg/mL(r=0.9999),0.5-2 μg/mL(r=0.9983),2.5-10 μg/mL(r=0.9997),2.5-10 μg/mL(r=0.9999),2.5-10 μg/mL(r=0.9999), 2.5-10 μg/mL(r=0.9999),0.05-0.2 μg/mL(r=0.9992),0.05-0.2 μg/mL(r=0.9997),respectively. RSDs of precision,stability and reproducibility tests were all lower than 5.0%. The recoveries were 93.9%-106.9%(RSD were 0.22%-2.94%,n=6).CONCLU-SIONSThe method is simple,precise,stable and reproducible,and can be used for simultaneous determination of 21 inorganic el-ements in H. japonicum.