パイロリティックグラファイト被覆管を用いる黒鉛炉原子吸光法による希土類及びアルカリ土類元素の分析
1978 年 27 巻 7 号 p. 441-443
詳細
1978 年 27 巻 7 号 p. 441-443
Trace amount of rare earth and alkaline earth elements was determined by graphite furnace atomic absorption spectrometry using the pyrolytic graphite coated tube. The apparatus used was a Hitachi atomic absorption spectrometer (Model 308) equipped with a Perkin Elmer graphite furnace atomizer (Model 2000). The pyrolytic-graphite-coated tubes were made in argon atmosphere containing (210) % volume of methane by heating the conventional tube (lengh; 53 mm, internal diameter 8.5 mm, external diameter; 10.5 mm) up to 2200°C for (210) min. The tube was applied to the determination of rare earth and alkaline earth elements by graphite furnace atomic absorption spectrometry. The sensitivity for Er, Eu, Gd, Ho, La, Pr, Sm, Tb, Y, Yb, Ba, Sr and Ca increased (2.56) fold by using the pyrolytic-graphite-coated tube.
