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次甲基蓝光度法测定镓中硫,其分析下限只能达到4×10~(-5)％。原因是:检出灵敏度不够和空白值高。硫离子的极谱测定有足够的灵敏度,已用于砷、三氯化砷及其他纯物质中微量硫的分析。通常,空白值来源于试剂和环境玷污。本文提出一种还原剂兼作镓的溶剂,并使分析过程在完全密闭装置中进行。因而,试剂空白及环境玷污的机率均降至可忽略程度。仪器、设备、试剂
Methylene blue photometric determination of gallium in the sulfur, the analysis of the lower limit can only reach 4 × 10 ~ (-5)%. The reason is: detection of inadequate sensitivity and high blank value. Sulfur ion polarographic determination of sufficient sensitivity has been used for arsenic, arsenic trichloride and other pure substances in the analysis of trace sulfur. In general, blank values are derived from reagents and environmental contamination. This paper presents a reductant that doubles as a gallium solvent and allows the analysis to be performed in a fully enclosed device. Thus, the reagent blank and the possibility of environmental contamination were reduced to negligible level. Instruments, equipment, reagents