罗丹明6G、丁基罗丹明B及四溴荧光素在光度分析中的应用

本文对丁基罗丹明B、罗丹明6G和四溴荧光素在萃取光度法和浮选光度法中的应用做了综述。参考文献44篇。     

Determination of trace mercury by solid substrate-room temperature phosphorimetry based on catalytic effect of Hg(2+) on formation of the ion association complex [Fe(bipy)(3)](2+)[(FinBr(4))(2)](2-)

A new solid substrate-room temperature phosphorimetry method for the determination of trace mercury has been established. It bases on the fact that in acetic acid medium, Hg²⁺ ion can catalyze the substitute reaction of CN⁻ ligand in [Fe(CN)₆]⁴⁻ by 2,2′-bipyridyl (bipy), and the resultant [Fe(bipy)₃]²⁺ cation can react with FinBr₄⁻ anion of tetrabromofluorescein (HFinBr₄) to form ion association complex [Fe(bipy)₃]²⁺[(FinBr₄)₂]²⁻ which can emit phosphorescent signal on filter paper substrate. Under the optimum condition, the linear dynamic range of this method is 1.6-16 fg per spot with a detection limit (LD) of 0.18 fg per spot (0.4 μl sample solution per spot), and the regression equation of working curve is ΔI_p=1.058+7.671 C_Hg²⁺ (fg per spot ), n=7, correlation coefficient is 0.9990. This method has been applied to the determination of trace mercury in hair and cigarette samples with satisfactory result. The reaction mechanism for formation of the ion association complex is also discussed.     

四溴荧光素丁基罗丹明B染料离子时的吸光性质研究

本对四溴荧光素、丁基罗丹明Ｂ各自的吸光性质以及它们的形成的离子缔合物的吸光性质进行了研究。测得四溴荧光素与丁基罗丹明Ｂ在ｐＨ７时的缔合比为１：２。其Ｋｓｐ＝２．１６×１０＾－１８。缔合物的萃取率为８３．２％。为进一步研究四溴荧光素、丁基罗丹明Ｂ的萃取光度分析奠定了理论基础。     

罗丹明6G·四溴荧光素等色染料离子对浮选光度法测定金

提出了等色染料离子对浮选光度法。向罗丹明６Ｇ（Ｒ６Ｇ）和ＡｕＢｒ－４的甲苯萃取物Ｒ６ＧＡｕＢｒ４中,加入ｐＨ＝５５的（ＮＨ４Ａｃ－ＨＡｃ）缓冲溶液,使Ｒ６Ｇ离子进入水相,并向其中加入与Ｒ６Ｇ颜色相同的四溴荧光素（ＴＢＦ）,形成等色染料离子对Ｒ６Ｇ＋·ＴＢＦ－被甲苯浮选。将浮选物溶于丙酮,于５３０ｎｍ处光度测定。由于２个染料分子（Ａｕ∶Ｒ６Ｇ∶ＴＢＦ＝１∶１∶１）同时吸光,方法具有很高的灵敏度,ε＝２０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１;金含量在０～０３６ｍｇ／Ｌ服从比耳定律,相对标准偏差为２９％,方法应用于粗铜中金的测定,结果满意。