二溴羟基苯基荧光酮-Triton-X-100 荧光熄灭测定铁  

Fluorescence Quenching Method for Determination of Trace Iron with DBH PF and Triton X 100

作　　者：付佩玉[1] 曹伟[1] 宋桂兰 高红亮[1] 

机构地区：[1]山东建材工业学院应用化学系

出　　处：《山东建材学院学报》1998年第2期109-111,共3页Journal of Shandong Institute of Building Materials

摘　　要：在ｐＨ＝４．５ＨＡｃ－ＮａＡｃ介质中，Ｔｒｉｔｏｎ－Ｘ－１００存在下，铁与二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）形成１∶３紫色络合物使ＤＢＨ－ＰＦ的荧光熄灭，由此建立了测定微量铁的新方法。络合物的λｅｘ＝５３４ｎｍ，λｅｍ＝５８４ｎｍ，线性范围为０～１６０μｇ／Ｌ，检出限０．６μｇ／Ｌ。方法用于硅酸盐矿物及水中微量铁的测定，结果与标准值相等，ＲＳＤ（ｎ＝５）小于４．６％。A fluorescence quenching method for determination of trace Fe(Ⅲ) was put forward.The method is based on the fluorescence quenching effect of DBH PF and Triton X 100 due to formation of a non fluorescent tertiary complex in pH 4 5 HAc NaAc medium.The maximum excitation and emission wavelengths of DBH PF are 534 and 584nm,respectively.The linear range is 0～160μg/L and Fe(Ⅲ) has detection limit of 0 6μg/L.The method has been used to determine trace amounts Fe(Ⅲ) in silicate minerals and water with satisfactory results.

关 键 词：铁 DBH-PF 荧光熄灭法 测定 

分 类 号：O614.811[理学—无机化学] O657.31[理学—化学]