Content Determination of 30 Kinds of Microelements in Mallotus apelta from Guangxi by ICP-MS / 中国药房

ABSTRACT

OBJECTIVE:To establish a method for simultaneous determination of 30 kinds of microelements in Mallotus apelta from Guangxi. METHODS:ICP-MS method was adopted. The radio frequency power was 1550 W,the sampling depth was 10 mm,the carrier gas velocity was 1.05 L/min,the atomizing chamber temperature was 2 ℃,and the peristaltic pump was 0.10 rps. The collision mode was He,and the gas flow rate was 4.2 mL/min. RESULTS:The linear ranges of aluminum,vanadium,chromi-um,manganese,iron,nickel,copper,zinc,gallium,arsenic,cadmium,antimony,molybdenum,rubidium,cesium,barium, lanthanum,cerium,praseodymium,neodymium,europium,gadolinium,dysprosium,holmium,erbium,lutetium,mercury,thal-lium,lead and uranium were 10-1000 ng/mL(r=0.9999),0.1-5 ng/mL(r=0.9999),0.1-5 ng/mL(r=0.9999),10-1000 ng/mL (r=0.9999),10-1000 ng/mL(r=0.9999),0.1-5 ng/mL(r=0.9997),0.5-100 ng/mL(r=0.9997),1-500 ng/mL(r=0.9998), 1-100 ng/mL(r=0.9997),0.5-50 ng/mL(r=0.9999),0.5-50 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),1-500 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9998),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999), 0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9999),0.1-10 ng/mL(r=0.9998),0.1-5 ng/mL(r=0.9984),0.1-10 ng/mL(r=0.9999),0.5-100 ng/mL(r=0.9997),0.1-10 ng/mL(r=0.9999),respectively. The limits of quantita-tion were no higher than 0.44 mg/kg,and the limits of detection were no higher than 0.11 mg/kg. RSDs of precision,stability and reproducibility tests were no more than 10.0%. The recoveries were 80.45%-116.68%(RSD ranged 0.47%-5.83%,n=6). The con-tents of Mn,Ba Fe and Al in samples were the highest. CONCLUSIONS:The method is simple,precise,stable and reproduc-ible,and can be used for simultaneous determination of 30 kinds of microelements in M. apelta from Guangxi. The contents of harmful elements are in line with national standard.