CAJ | 학술논문

用国产电感耦合等离子体质谱仪（IC P -M S ）建立了测量地球化学样品中稀土和铀钍元素含量（L a、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、U、Th）的方法。样品在高温密闭环境下用氢氟酸-硝酸-高氯酸三酸混合消解。溶液通过在线三通进入雾化器，选择元素Re作为内标测量样品中各元素的含量，选择质谱干扰较少的元素谱线进行测量。采用多点标准获得的标准曲线的线性相关系数大于0.999，通过测量空白溶液得出大部分元素的仪器的检出限在0.001～0.01ng · mL -1左右。实验测量得到仪器的氧化物产率为2.8％，双电荷产率为2.1％，短期稳定性（20min）优于3％，长期稳定性（2h）优于5％。实验测试了多种国家标准物质，测量值与参考值吻合。
용국산전감우합등리자체질보의（IC P -M S ）건립료측량지구화학양품중희토화유토원소함량（L a、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、U、Th）적방법。양품재고온밀폐배경하용경불산-초산-고록산삼산혼합소해。용액통과재선삼통진입무화기，선택원소Re작위내표측량양품중각원소적함량，선택질보간우교소적원소보선진행측량。채용다점표준획득적표준곡선적선성상관계수대우0.999，통과측량공백용액득출대부분원소적의기적검출한재0.001～0.01ng · mL -1좌우。실험측량득도의기적양화물산솔위2.8％，쌍전하산솔위2.1％，단기은정성（20min）우우3％，장기은정성（2h）우우5％。실험측시료다충국가표준물질，측량치여삼고치문합。
A method for the determination of 16 elements(La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Th、U) by inductively coupled plasma mass spectrometry with instrument made in China has been developed. Samples were digested with mixed acid of HF-HNO3-HClO4 in closed vessel. Rhenium was used as an on-line internal standard by a three-way tube. The effect of spectra interferences were mini-mized by selecting proper mass value. The linear correlation coefficient of calibration equation was better than 0.999 ,the detection limits of the instrument for those elements were vary from 0.001 to 0.01 ng · mL -1. Molecular oxides ratio of the instrument was 2.8% ,doubly charged ions ratio was 2.1% ,short term stability of 20 minute was better than 3% ,and long term stability of 2 hours was about 5% . Six kinds of national standard reference materials were used to test the method ,the analytical results were in agreements with the certified values.