Kragten J, Decnop-Weever L G, Gründler P
Laboratorium voor Analytische Chemie, Universiteit van Amsterdam, Amsterdam, The Netherlands.
Talanta. 1993 Apr;40(4):485-90. doi: 10.1016/0039-9140(93)80004-b.
From the precipitation borderlines in the pBi'-pH diagram, determined experimentally under CO(2)-free conditions, the stability constants of bismuth hydroxide, bismuthoxynitrate and bismuthoxyperchlorate have been established. The following values have been found Nitrate-medium: Perchlorate-medium: log *K(SO)(OH) = 5.2, log *K(SO)(OH) = 5.2; log K(SO)(NO(3)) = -1.2, logK(SO)(ClO(4)) = -0.9; log *beta(2) = -4.0, log *beta(2) = -4.1; log *beta(3) = -10.0, log *beta(3)= -9.9; log *beta(4) = -21.5, log *beta(4) = -21.5; log *beta(1,0,1) = 1.2, log *beta(1,0,1) = 3.5. The constants refer to precipitates equilibrated for 30 min, prepared at room temperature (23 +/- 0.5 degrees) in sodium perchlorate or sodium nitrate medium with an ionic strength of 1.00 +/- 0.01. Concerning error propagation it is stated that pBi' values calculated with these constants will have a standard deviation of about 0.1 log unit.
在无二氧化碳条件下通过实验测定的pBi'-pH图中的沉淀边界，确定了氢氧化铋、硝酸氧铋和高氯酸氧铋的稳定常数。得到了以下数值：硝酸盐介质：高氯酸盐介质：logK(SO)(OH)=5.2，logK(SO)(OH)=5.2；logK(SO)(NO₃)= -1.2，logK(SO)(ClO₄)= -0.9；logβ₂ = -4.0，logβ₂ = -4.1；logβ₃ = -10.0，logβ₃ = -9.9；logβ₄ = -21.5，logβ₄ = -21.5；logβ(1,0,1)=1.2，logβ(1,0,1)=3.5。这些常数适用于在室温（23±0.5摄氏度）下于离子强度为1.00±0.01的高氯酸钠或硝酸钠介质中制备并平衡30分钟的沉淀物。关于误差传播，声明用这些常数计算得到的pBi'值将具有约0.1对数单位的标准偏差。
