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用化学方法测定物料中的微量锶和钡是非常困难的,用N_2O-C_2H_2焰的原子吸收法测定的灵敏度也不高。本法选用了合适的缓冲剂和电极,有效地降低了光谱背景,可直接测定岩石、土壤等物料中3ppm以上的锶和钡。一、试剂及仪器工作条件用光谱纯或高纯试剂混合磨匀作为合成基体,其中含NaCl5％,Fe_2O_310％,MgO10％,Al_2O_325％,SiO_250％。以此配制两套标准,标1~#:Sr0.0003—0.007％,Ba0.003—0.07％标2:Sr0.0003—0.007％
It is very difficult to determine the trace amount of strontium and barium in the material by chemical methods. The sensitivity of atomic absorption spectrometry with N 2 O-C 2 H 2 flame is also not high. This method selects the appropriate buffer and electrode, effectively reducing the spectral background, can be directly measured rock, soil and other materials more than 3ppm of strontium and barium. First, the reagents and instruments Working conditions Spectrum pure or high purity reagents mixed grinding uniform as a synthetic substrate, which contains NaCl5%, Fe2O3, MgO10%, Al2O3, SiO250%. In order to prepare two sets of standards, standard 1 ~ #: Sr0.0003-0.007%, Ba0.003-0.07% standard 2: Sr0.0003-0.007%