Fe(Ⅲ)-磺基水杨酸-甲基紫-聚乙烯醇体系光度法测定痕量铁  

PHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF Fe(Ⅲ) WITH SULFOSALICYLIC ACID (SSA) METHYL VIOLET (MV) AND POLYVINYL ALCOHOL (PVC)

作　　者：吕明[1] 崔运成[1] 

机构地区：[1]吉林师范大学化学学院,四平136000

出　　处：《理化检验（化学分册）》2003年第10期602-603,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出了在聚乙烯醇存在下,Fe(Ⅲ)-磺基水杨酸-甲基紫三元配合物光度法测定Fe(Ⅲ)的方法。该法灵敏度高(ε=3.44×10~5L·mol^(-1)·cm^(-1)),选择性及精密度均好,用于水中痕量铁的测定,结果满意。A photometric method of determination of trace amounts of iron by the formation of a ternary complex among SSA, MV and PVA was described. The molar absorptivity of the color reaction was found to be (ε_(510)) 3.44×10~5L·mol^(-1)·cm^(-1). Beer's law holds in the range of 0～7.0μg of Fe(Ⅲ) per 50ml of solution. This method has been applied to the determination of iron in water samples and the RSD's found were less than 3.1%.

关 键 词：Fe(Ⅲ) 磺基水杨酸 甲基紫 聚乙烯醇 光度法 测定 痕量元素 三元配合物体系 天然水 

分 类 号：O661.1[理学—分析化学] O614.811[理学—化学]