氢化物发生石墨炉原子吸收光谱法直接测定高温镍基合金中的硒

Direct Determination of Selenium in High Temperature Nickel-base Alloy by Hydride Generation-Graphite Furnace Atomic Absorption Spectrometry

在6mol/L盐酸介质和0.1％KBH_4条件下,不但能有效地发生硒的氢化物,而且5mg/ml Ni和3mg/ml Fe都不干扰硒的测定。利用涂钯石墨管作为氢化物的原于化器,直接测定了高温镍基合金中的硒,特征质量为40pg,相对标准偏差在6.1％以内,回收率在97％～110％之间。

Selenium hydride generation in 6 mol/L hydrochloric acid and 0.1% KBH_4 is efficient , and 5 mg/ml Ni( Ⅱ ) or 3 mg/ml Fe( Ⅲ ) does not interfere with the determination of selenium. Selenium in high temperature nickel-base alloy is determined directly by concentration of selenium hydride on a palladium coated graphite tube. Characteristic mass is 40 pg. Relative standard deviation and recovery are 5. 4%-6. 1%and97%-110% , respective-1y.