原子吸收法间接测定痕量氯

STUDIES ON THE INDIRECT DETERMINATION OF TRACE CHLORINE BY ATOMIC ABSORPTION SPECTROMETRY

浊度法和离子选择电极电位法是测定氯离子的简便和常用的方法。对于低于10^(-5)mol/L氯离子的测定,这些方法遇到不少困难。本法利用氯离子对银的原子化程度的影响,用AAS法来间接测定低于10^(-5)mol/L浓度氯离子,无需分离,方法快速。这种分析方法具有实际应用价值。

The turbidimetry and ionic selective electropotential are simple and commonly useful method for the determination of chlorine. But it is difficult to determine chlorine ion below 10^(-5)mol/L. Only a few articles for the indirect determination trace chlorine by AAS have been reported. The atomization degree of silver can be affected by chlorine, and can use it to determine chlorine ion below 10^(-5)mol/L indirectly. In this paper, the ionic accumulation of chlorine and silver in solution is controlled less than its K_(sp). The method is simple and quick without separation. The method has been used to determine chlorine in water, inorganic and organic reagents with satisfactory results. The recovery is 90～115%.