论文部分内容阅读
氟硼络阴离子BF_4~-与次甲基蓝阳离子形成蓝色络合物,微溶于水而易溶于有机溶剂如二氯乙烷。显色反应的灵敏度高,可用于微量硼的测定。显色条件和干扰离子的影响已见于文献。本工作采用微量萃取技术,使用自制聚乙烯萃取管和国产72型分光光度计,使硼的最低量可测定至1×10~(-8)克。当三氯氢硅和四氯化硅取样20毫升时,方法相对灵敏度为3或4×10~(-8)％。目前国内外多用化学光谱法测定三氯氢硅和四氯化硅中的硼,但有时,简便快速的比色法亦常应用于生
Fluoroboron anion BF_4 ~ - and the methyl blue cations form a blue complex, slightly soluble in water and soluble in organic solvents such as dichloroethane. Color reaction sensitivity, can be used for the determination of trace boron. The effects of color conditions and interfering ions have been documented in the literature. This work using trace extraction technology, using homemade polyethylene extraction tube and domestic 72 spectrophotometer, the minimum amount of boron can be determined to 1 × 10 ~ (-8) grams. When trichlorosilane and silicon tetrachloride sample 20 ml, the relative sensitivity of the method is 3 or 4 × 10 ~ (-8)%. At present, multi-purpose chemical spectrometry is used to determine boron in trichlorosilane and silicon tetrachloride, but in some cases, simple and rapid colorimetric method is often applied to students