石墨炉原子吸收光谱法测定磷时基体改进剂的应用研究

Application of Matrix Modifier to the Determination of Phosphorus by Graphite Furnace Atomic Absorption Spectrometry

本文阐述几种基体改进剂测定磷的效果,发现Pd/Ca混合基体改进剂对测定植物和动物组织中磷最理想,利用氘灯扣背景,其特征量为8.2ng,吸光度线性范围为0～0.220,磷含量为0.144％和1.35％时,相对标准偏差为2％左右,精密度好,抗干扰能力强,测定茶树叶和贻贝中磷比较理想。

The effect was presented for the determination of phosphorus with matrix modifier by graphite furnace atomic absorption spectrometry. It was found from results that Pd/Ca as a matrix modifier was more reasonable to determine phosphorus in animal and plant samples. The linear relationship between the absorbance and the concentration of phosphorus in the range of 0～20 μg/ml was obtained. The results were in good agreement with the reference and standard values.