稀土元素的原子吸收光谱分析研究(Ⅵ)——有机试剂中磺酸基对镱火焰原子化的影响

Atomic Absorption Spcctrophotomctric Studies on Rare Earth Elements (Ⅵ)——The Effect of Sulfo-Group in the Molecule of Organic Reagentson flame Atomization Behavior of Ytterbium

在空气-乙炔焰中,研究了有机试剂分子中磺酸基对镱原子化行为的影响.发现含磺酸基的有机试剂,无论其分子中有无键合原子,键合原子为氮或氧,对镱均具有显著的增感效应;试剂中磺酸基的数目影响其增感程度,而其相对位置基本上无影响.并初步探讨了有机试剂分子中磺酸基的作用机理.

The sensitivity and selectivity of some elements can be increased by organic reagents in theatomic absorption spectrophotometry. The effect of sulfo-group in the organic molecule of reagents on flame atomization of metal elements has not been reported. In the present paper, the effect of sulfo-group on the atomic absorption spectr9photometric behavior of ytterbium is studied in an air-acetylene flame. The results obtained indicate that there are a marked enhancement effect for organic reagents with sulfo-group in spite of the fact that there is or not bonding atom, and the bonding atom is nitrogen or/and oxygen. The number of sulfo-group affects the degree of sensibilization, and their relative position has not the influence basically. The mechanism of the enhancement effect of sulfo-group is also discussed.