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是出了在同一份样品溶液中采用电位滴定法和库仑滴定法分别直接测定Fe~(3+)和Fe~(2+)的方法。在实验确定的最佳条件下测定0.20～5.00mgFe~(3+)的RSD％小于0.90(n=5);测定0.032～10.0mgFe~(2+)的RSD％小于0.86(n=5)。用岩石一级标准物质和单矿物标准物质检验并参加标准物质GSR 7～12的协作定值,结果良好。
Is a method of direct determination of Fe ~ (3+) and Fe ~ (2+) using potentiometric titration and coulometric titration respectively in the same sample solution. The RSD% of 0.20 ~ 5.00mg Fe ~ (3+) was less than 0.90 (n = 5) under the best experimental conditions. The RSD% of 0.032 ~ 10.0mg Fe ~ (2+) was less than 0.86 (n = 5). With the rock standard and single mineral reference material to test and participate in the standard material GSR 7 ~ 12 collaborative set value, the result is good.