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本文利用能与氰化物形成络合物的一些金属离子熄灭鲁米诺—铜—氰发光的化学特性,以Ag(I)离子熄灭Luminol—Cu~(2+)—CN(?)发光,使其化学发光信号减弱为指示标志,并系统地研究了痕量Ag(I)离子定量熄灭该体系发光的最佳条件和方去。本法的检测下限为2.6×10~(-3)μg/ml,线性范围为0.01～0.1μgAg(I)/ml,对20多种金属离子的干扰进行了试验,用巯基棉富集分离干扰元素,提高了方法的选择性,对7种含银量为0.xx～x.0g/t矿石的测定,结果满意。
In this paper, some metal ions that can form complexes with cyanide are used to quench the luminol-copper-cyanide chemiluminescence and to quench Luminol-Cu ~ (2 +) - CN (?) With Ag Its chemiluminescence signal is weakened as an indicator, and the optimal conditions and methods of quantitatively quenching the system of Ag (I) ions are studied systematically. The limit of detection of this method is 2.6 × 10 -3 μg / ml with a linear range of 0.01 ~ 0.1 μgAg (I) / ml. The interference of more than 20 metal ions has been tested by using the enrichment and separation of sulfhydryl cotton Element, improved the selectivity of the method, the determination of seven kinds of ore containing 0.xx ~ x.0g / t silver content, the results are satisfactory.