火焰原子吸收法最灵敏线和次灵敏线测定水样中钠的不确定度分析

Uncertainty in deterrnination of natrium in water samples by flame atomic absorption spectrometry using first and secondary resonace lines

对使用火焰原子吸收法最灵敏线和次灵敏线作为测定波长测定水样中钠的不确定度进行分析。结果表明对钠含量较高的水样使用次灵敏线作为测定波长,测定结果的不确定度较小,这是由于避免了稀释作用而引入的不确定度。

The uncertainty in the determination of natrium in water samples by flame atomic absorption spectrometry using the first and secondary resonancce lines as detection wavelengths was investigated.The results showed that using the secondary resonance line as detection wavelength for the determination of samples with higher natrium concentration,the uncertainty of the experimental results was low.The reason was that the uncertainty introduced by dilution was avoided.