建立了微波消解结合MPT-AES法测定中药玛卡中Ca、Fe、Zn、Cu、Cd、Pb的方法，样品经微波消解后，利用微波电感耦合等离子体炬发射光谱（MPT-AES）进行了测定，并对影响微波消解的因素和条件进行了考察，对MPT光谱仪的载气流量、工作气流量等仪器参数进行了优化选择，并且对酸效应和共存元素的影响也进行了实验，在最佳实验条件下得到Ca、Fe、Zn、Cu、Cd、Pb检出限依次为5.61、12.4、7.8、3.7、3.4、6.1 ng/mL，RSD（精密度）在0.3%~1.5%，加标回收方法检测出Ca的回收率区间为99%~101.5%，Fe的回收率在102%~104%，Zn的回收率区间在95.5%~97%，Cu、Cd、Pb的回收率分别在96.5%~98.5%、98%~104%、94%~96%。

Microwave digestion combined with microwave inductively coupled plasma torch of emission spectrum (MPT-AES) method is established for determination of Ca,Fe,Zn,Cu,Cd and Pb in Marka,a traditional Chinese medicine.After the sample is digested by microwave,it is determined by MPT-AES,and the influence factors and conditions of microwave digestion are investigated.The parameters of MPT spectrometer,such as carrier gas flow and work gas flow are optimized,and the acid effect and the influence of coexisting elements are also investigated.Under the optimum experiment conditions,the detection limits for Ca,Fe,Zn,Cu,Cd,and Pb are 5.61,12.4,7.8,3.7,3.4,and 6.1 ng·mL^-1,respectively,RSD (precision) is between 0.3%-1.5%,the recovery of Ca is in the range of 99%-101.5%,that of Fe in the range of 102%-104%,that of Zn in the range of 95.5%-97%,the recoveries of Cu,Cd,Pb in 96.5%-98.5%,98%-104% and 94%-96%,respectively.

关皓天(1993-),男,硕士生