Martinez L D, Perino E, Marchevsky E J, Olsina R A
Department of Analytical Chemistry, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis, P.O. Box 375, 5700-San Luis, Argentina.
Talanta. 1993 Mar;40(3):385-90. doi: 10.1016/0039-9140(93)80249-q.
Reaction between gadolinium(III) and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5- Br-PADAP) was studied for delineating optimal conditions for complexation. This reagent can be used for the spectrophotometric determination of Gd(III) in concentrations ranging from 0.04 to 1.2 ppm (a = 1.76(+/- 0.03) x 10(5) (1.(-1) mole(-1). cm). The reaction takes place at a pH between 9.2 and 11.6. In the presence of Triton X-100 this complex is soluble in water. In order to overcome difficulties caused by the presence of other lanthanides, an ion exchange chromatographic technique was used.
研究了钆（III）与2-（5-溴-2-吡啶偶氮）-5-二乙氨基苯酚（5-Br-PADAP）之间的反应，以确定络合的最佳条件。该试剂可用于分光光度法测定浓度范围为0.04至1.2 ppm的钆（III）（a = 1.76（±0.03）x 10⁵（1⁻¹摩尔⁻¹·厘米））。反应在pH值为9.2至11.6的条件下进行。在Triton X-100存在下，该络合物可溶于水。为了克服其他镧系元素存在所带来的困难，采用了离子交换色谱技术。
