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提出基于以 Pd-Ni为复合基体改进剂和利用二次灰化法的热解涂层石墨炉原子吸收测定中药材中硒和钼的方法。该方法的相对标准偏差分别为硒小于 4.2 % ,钼小于 5 .0 % ,加标回收率分别为硒 93 .7%～ 1 0 5 .8% ,钼 94.6%～ 1 0 1 .9%。方法准确 ,结果满意 ,已用于 1 0 0种中药材中硒和钼含量的测定
This paper presents a method for the determination of selenium and molybdenum in Chinese herbal medicine based on graphite pyrolysis atomic absorption spectrometry using Pd-Ni composite matrix modifier and secondary ashing method. The relative standard deviations of this method were less than 4.2% for selenium, less than 5.0% for molybdenum, and 93.7% to 105.8% for selenium, and 94.6% to 110.9% for molybdenum. The method is accurate and the results are satisfactory. It has been used to determine the content of selenium and molybdenum in 100 kinds of Chinese herbal medicines.