The Influences of Different Graphite Tubes on Determination of Antimony with Graphite Furnace Atomic Absorption Spectrometry
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摘要: 比較五種石墨管對銻的干擾的影響,實驗結果表明:石墨管中引入微管或平臺后,由于具有好的空間等溫性,可明顯地抑制外來離子對銻的干擾;而石墨管熱解涂層對抑制銻干擾有顯著影響。鎳的干擾在使用雙管(1)時雖得到抑制,但仍無法消除。實驗表明:采用Mo+W難熔碳化物涂層處理,并加入EDTA及峰面積測定方式可消除鎳對銻的干擾。Abstract: The influence to the interferences on determination of Sb using five kinds of graphite tubes is reported. The introduction of microtube or platform, for its more homogeneous temperature, can increase the sensitivity and inhibits the interferences of foreign ions. The interference of nicle, which can not be eliminated with tube-in-tube technique, can be eliminated by the addition of EDTA; coating of Mo and W carbides and measurement of peak area.
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Key words:
- graphite furnace atomic absorption spectromelry /
- graphite tube /
- antimony /
- interference
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