摘要
目的探究一种更加准确、合理且对仪器影响较小的电感耦合等离子体质谱(ICP-MS)重金属检测方法的在线内标物浓度。方法选择标准曲线范围内10、50、200、500、1 000μg/L的质量浓度水平作为内标溶液在线加入,测定栀子药材中V、Cr、Mn、Fe、Ni、Cu、Zn、As、Cd、Pb和Hg元素。结果低浓度水平内标不足以校正仪器波动,对测定结果影响较大;高浓度内标溶液易造成污染,在校正仪器的同时容易掩盖信号,影响进样前调谐;500μg/L内标既能使待测元素有稳定的响应值,又不会过于抑制信号。结论内标浓度的选择既要兼顾标准曲线进样浓度,又要避免浓度过高造成的信号掩盖,500μg/L的内标浓度能够有效补偿中药材金属元素测定过程的基体效应,测定结果相对准确。
Objective To provide a proper concentration of Internal Standard Solution by comparing five different degrees to the simultaneous analysis of 10 metals including V,Cr,Mn,Fe,Ni,Cu,As,Cd,Pb and Hg in Cardeniajasminoides.Method An Inductively Coupled Plasma-Mass Spectrometry method with Microwave-Assisted Digestion was developed with10,50,200,500,1 000 μg/L of Ge,In,Bi as internal standard.Result The degree of 500 μg/L concentration of internal stand solution can both correct the matrix effect and alleviate the contamination as the 1 000 μg/L.Conclusion With excellent detection limits,high sensitivity and wide linear range,the 500 μg/L internal standard may serve as reference in the determination of elements in other traditional Chinese medicine （TCM）.
出处
《药物评价研究》
CAS
2017年第4期500-505,共6页
Drug Evaluation Research
