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基体改进剂应用于石墨炉原子吸收已有大量的报导,有人曾经将铑应用于硒的石墨炉原子吸收测定,但是,未见应用于碲的测定。作者通过试验发现,铑可以提高碲的灰化温度和测定灵敏度,并能增加测定结果的稳定性。方法应用于黄铁矿中碲的测定,可不须分离直接进行。 方法的灵敏度为6.3×10~(-11)克碲/1％吸收,对于含碲0.2微克/毫升溶液22次测定的变动系数为1.10％,标准回收为94～105％。
There have been a lot of reports about the application of matrix modifier in graphite furnace atomic absorption. Some people used rhodium for graphite furnace atomic absorption spectrometry of selenium. However, it has not been applied to the determination of tellurium. The authors found through experiments that rhodium can improve tellurium ashing temperature and sensitivity, and can increase the stability of the measurement results. The method is applied to the determination of tellurium in pyrite, which can be carried out without isolation. The sensitivity of the method was 6.3 × 10 ~ (-11) g Te / 1% absorption. The coefficient of variation for 22 determinations of the tellurium-containing 0.2 μg / ml solution was 1.10% and the standard recovery was 94 ~ 105%.