利用催化动力学原理测定化探样中微量碘的含量

THE CATALYSIS DYNAMICS THEORY FOR THE DETERMINING OF MINIM IODINE CONTENT OF GEOCHEMICAL EXPLORATION SAMPLES

在HAc-NaAc形成的中性缓冲溶液体系中,利用碘的催化动力学原理,使N-N-四甲基-4-4-二氨基二苯甲烷与氯胺T的氧化反应,生成蓝色络合物来测定地探样中微量碘的含量。通过实验,最佳试剂加入量为8%的HAc溶液5mL,8%的Na2CO3溶液3mL,0.1%的N-N-四甲基-4-4-二氨基二苯甲烷溶液5mL所组成的溶液体系中,在加入0.1%的氯胺T1mL显色后,其测定结果准确度、精密度高,检出限低,测定化探样中微量碘时该方法可以推广应用。

Using the catalysis dynamics theory of iodine to determine the minim iodine of geochemical exploration samples in the neutral .buffer solution system generated by HAc-NaAc, of which, the Oxidation reaction of chloramines and diaminodiphenylmethane generating blue complex. Based on the experiment, the. optimal reagent imputting quantity is a solution system composed of 5mL liquor of 8% HAc, 3mL liquor of 8% Na2CO3, and 5mL liquor of 0.1%N-N-tetramethyl-4-4-diaminodiphenylmethane, the measuring results with high accuracy and precision and low detection limit after showing color by imputing lmLliquor of 0.1% chloramine T.