论文部分内容阅读
用极谱法测定硼是比较困难的,多年来国内外在这方面报道很少。文献介绍有碘化四甲基铵法和甘露醇一亚硫酸钠法等,前者的E_(1/2)为-1.9伏;后者E_(1/2)-0.56和-1.04伏有两个波,用示波极谱可测定0.1微克/毫升,但在实际分析中均未得到推广和应用。本文受铍试剂Ⅲ分光光度法测定硼和示波极谱法测定铍的启发,研究了铍试剂Ⅲ极谱络合吸附波测定的体系并对其机理进行了初步的探讨,得出铍试剂Ⅲ与硼的络合物吸附在电极上,其中配位体铍试剂Ⅲ产生的还原波。方法具有较高的灵敏度,0.025—5微克/10毫升的硼与峰电流呈线性关系。能简便地测定岩石土壤中的微量硼并取得满意结果。
Polarographic determination of boron is more difficult, over the years at home and abroad rarely reported in this regard. The literature describes tetramethylammonium iodide and mannitol monosulfite methods, the former E_ (1/2) is -1.9 volts; the latter E_ (1/2) -0.56 and -1.04 volts have two waves, Measured by oscillopolarography 0.1 micrograms / ml, but in actual analysis have not been promoted and applied. In this paper, beryllium reagent Ⅲ spectrophotometric determination of boron and oscillopolarographic determination of beryllium inspired by beryllium reagent Ⅲ Polarographic Determination of Adsorption Complex and its mechanism of a preliminary study obtained beryllium reagent Ⅲ The complex with boron is adsorbed on the electrode, and the reducing wave generated by the ligand beryllium III. The method has high sensitivity, and a linear relationship between boron and peak current of 0.025-5 μg / 10 ml. Trace boron in rocky soil can be measured easily and satisfactory results can be obtained.