CAJ | 학술논문

建立了P-Mo-Bi三元体系光度法测定磷石膏中可溶磷含量的方法,确定了最佳测定条件.本法可消除可溶性硅的干扰,测定在室温下进行,以抗坏血酸为还原剂.硅杂质含量(以SiO2计)在0~5g/L范围内对测定无干扰.所得线性回归方程相关系数为0.9996,表观摩尔吸光系数为3.22×104L/(mol·cm),加标回收率在97.55%以上.该方法反应速度快,稳定性较好,操作简便,并可在很大程度上消除硅杂质的干扰.
건립료P-Mo-Bi삼원체계광도법측정린석고중가용린함량적방법,학정료최가측정조건.본법가소제가용성규적간우,측정재실온하진행,이항배혈산위환원제.규잡질함량(이SiO2계)재0~5g/L범위내대측정무간우.소득선성회귀방정상관계수위0.9996,표관마이흡광계수위3.22×104L/(mol·cm),가표회수솔재97.55%이상.해방법반응속도쾌,은정성교호,조작간편,병가재흔대정도상소제규잡질적간우.
A spectrophotometric method was established based on P-Mo-Bi system for the determination of soluble-phosphorus content in phosphogypsum. The optimum conditions were defined. The method eliminated the interference of dissolved silicon, and the determination was carried out at room temperature with ascorbic acid as reductant. The silicon impurities (SiO2) in the range of 0~5g/L did not interfere. The coefficient of correlation for the regression equation was was over 97.55%. The method has the advantages of fast reaction rate, good stability, and simple operation, and can eliminate the interference of silicon impurities considerably.