CAJ | 학술논문

在聚乙烯醇(PVA)存在下，铑(Ⅲ)与钨酸盐及罗丹明B(RB)形成的离子缔合物在 570 nm 处产生最大吸收。建立了测定铑(Ⅲ)的光度分析方法，其表观摩尔吸光系数ε达 107(L.mol-1.cm-1) 数量级。方法的检测范围为 0～50 ng/25mL，检出下限为 0.29 ng/25 mL。大量存在的常见离子对 Rh(Ⅲ) 的测定不干扰。用此方法测定了催化剂及工业产品中铑的含量，结果与标准方法(SnCl2 法)一致。
재취을희순(PVA)존재하，로(Ⅲ)여오산염급라단명B(RB)형성적리자체합물재 570 nm 처산생최대흡수。건립료측정로(Ⅲ)적광도분석방법，기표관마이흡광계수ε체 107(L.mol-1.cm-1) 수량급。방법적검측범위위 0～50 ng/25mL，검출하한위 0.29 ng/25 mL。대량존재적상견리자대 Rh(Ⅲ) 적측정불간우。용차방법측정료최화제급공업산품중로적함량，결과여표준방법(SnCl2 법)일치。
The ion-associated complex formed by rhodium,tungstate and rhodamine B(RB) in the presence of polyvinyl alcohol(PVA) has a maximum absorbance at 570 nm.A sensitive method for determination of Rh(Ⅲ) was developed based on this reaction. Its apparent molar absorptivity is more than 107 L*mol-1*cm-1 with a linear range is 0～50 ng/25mL Rh(Ⅲ) and detection limit of 0.0114 ng/mL. Other ions in samples did not interfere the determination of rhodium. The results for determination of rhodium in real samples obtained by this method were consistent well with those obtained by SnCl2 method.