借IAP-4S和高效液相色谱分离和测定铱和铑（英文）

HPLC Separation and Determination of Ir(Ⅳ) and Rh(Ⅲ) with IAP-4S

借离子对反相高效液相色谱分离了铱（Ⅳ）和铑（ＩＩＩ） 的２（２咪唑偶氮）苯酚４磺酸（ＩＡＰ４Ｓ）螯合物，并于５６０ ｎｍ 波长处检测之．研究了Ｉｒ（ Ⅳ）和Ｒｈ（ Ⅲ）ＩＡＰ４Ｓ螯合物分离的最宜条件．于Ｎｕｃｌｅｏｓｉｌ Ｃ８ 柱上，用含７．５×１０－３ ｍｏｌ／ＬＫＨ２ＰＯ４Ｎａ２ＨＰＯ４缓冲剂（ｐＨ７．５） 和５．５ ×１０－３ ｍｏｌ／Ｌ溴化四丁基铵的甲醇水（４０：６０，ｖ／ｖ） 作流动相，流速为０．８ ｍＬ／ｍｉｎ． 检测限为１．３ ｎｇ 铱和１．５ ｎｇ 铑．

Iridium(Ⅳ) and rhodium(Ⅲ) as chelates with 2 (2 imidazolylazo) phenol 4 sulphonic acid (IAP 4S) were separated by ion pair reversed phase high performance liquid chromatography and detected spectrophotometrically at 560 nm. The optimum conditions for the separation and determination of the Ir(Ⅳ) and Rh(Ⅲ) IAP 4S chelates were investigated. The chelates were separated on a Nuleosil C 8 column (250 mm×4.6 mm I.D.) using methanol water (40:60,v/v) containing 7.5×10 -3 mol/L KH 2PO 4 Na 2HPO 4 buffer (pH 7.5) and 5.5×10 -3 mol/L tetrabutylammonium bromide (TBA·Br) as a mobile phase at a flow rate of 0.8 mL/min. The detection limits were 1.3 ng for Ir and 1.5 ng for Rh.