【摘要】 本文提出了一个高灵敏和简便的测定磷的分光光度法,找到了磷钼杂多酸与甲基绿缔合物定量形成的最佳条件,每25毫升0～6微克磷符合比耳定律,表观摩尔吸光系数7.2×10~4升/摩尔·厘米,拟定的手续已应用于土壤中微量磷的测定并获得满意结果,标准偏差0.056,变异系数2.48%。更多还原

【Abstract】 A higt sensitivity and convenient spectrophotometry for phosphorus issuggested. The optimun condition of the quantitative formation of associa-tion of molybdophosphoric heteropolyacids with methyl green is found. TheBeer law is obeyed range from 0 to 6 of phosphorus per 25 ml, and theapparent molar absorptivity is 7.2×10⁴ l·mol^-1·cm^-1. The deviation coeffi-cient is 2.48%.更多还原