Zhi-Liang J
Laboratory of Instrumental Analysis, Department of Chemistry, Guangxi Normal University, Guilin, People's Republic of China.
Talanta. 1992 Oct;39(10):1317-21. doi: 10.1016/0039-9140(92)80244-8.
Iridium(IV) has a strong catalytic effect on the slow redox reaction between Malachite Green and periodate ion in pH 4.2 acetate buffer solution at 100 degrees , and Malachite Green exhibits a sensitive single-sweep oscillopolarographic wave at -0.65 V vs. SCE. This provides the basis for a novel and highly sensitive and selective catalytic method with oscillopolarographic detection for iridium. The effect of pH, potassium periodate and Malachite Green concentrations, reaction temperature and reaction time and other variables are investigated. The detection limit is 8 ng/l. with a fixed-reaction time of 10 min. A linear calibration graph from 24 to 1600 ng/l. is obtained. Possible interferences by co-existing ions are examined.
在100℃、pH 4.2的醋酸盐缓冲溶液中，铱（IV）对孔雀石绿与高碘酸根离子之间缓慢的氧化还原反应具有强烈的催化作用，孔雀石绿在相对于饱和甘汞电极（SCE）为 -0.65 V处呈现出灵敏的单扫描示波极谱波。这为一种新颖、高灵敏且高选择性的铱催化示波极谱检测方法提供了基础。研究了pH、高碘酸钾和孔雀石绿浓度、反应温度、反应时间等变量的影响。在固定反应时间为10分钟时，检测限为8 ng/L。获得了24至1600 ng/L的线性校准曲线。考察了共存离子可能产生的干扰。
