CAJ | 학술논문

研究〔I2Br〕-络阴离子与乙基紫、结晶紫、维多利亚蓝4R等碱性三芳基甲烷染料在聚乙烯醇存在下的离子缔合反应的条件、分光光度特征和分析化学性质。结果表明，在稀磷酸介质中，当形成上述离子缔合络合物时，溶液均发生明显的颜色变化。不同染料体系的摩尔吸光系数在2.6×104～6.2×104L*mol-1*cm-1之间，以乙基紫体系灵敏度最高。碘离子浓度在0～1.6mg/L（乙基紫体系）、0～1.4 mg/L（结晶紫体系）和0～0.8 mg/L(维多利亚蓝体系)符合比耳定律，可用于水相直接显色测定碘离子。方法也有良好的选择性，较大量的其他卤离子、一些无机酸根以及一定量的常见金属离子不干扰。用于海带、紫菜和黄豆中碘离子的测定，结果较为满意。
연구〔I2Br〕-락음리자여을기자、결정자、유다리아람4R등감성삼방기갑완염료재취을희순존재하적리자체합반응적조건、분광광도특정화분석화학성질。결과표명，재희린산개질중，당형성상술리자체합락합물시，용액균발생명현적안색변화。불동염료체계적마이흡광계수재2.6×104～6.2×104L*mol-1*cm-1지간，이을기자체계령민도최고。전리자농도재0～1.6mg/L（을기자체계）、0～1.4 mg/L（결정자체계）화0～0.8 mg/L(유다리아람체계)부합비이정률，가용우수상직접현색측정전리자。방법야유량호적선택성，교대량적기타서리자、일사무궤산근이급일정량적상견금속리자불간우。용우해대、자채화황두중전리자적측정，결과교위만의。
The reaction conditions, the spectrophotometric characteristics, and the analytical properties of the ion-association complex of 〔I2Br〕- with the basic triarylmethane dye such as ethyl violet (EV), crystal violet (CV), and victoria blue 4R (VB4R) in the presence of polyvinyl alcohol (PVA) were studied. The results showed that the color of the solutions would change obviously when the above ion-association complexes were formed in dilute phosphoric acid solution. The molar absorptivities (ε) of different systems are between 2.6×104 and 6.2×104 L*mol-1*cm-1. The sensitivity of the ethyl violet system is the highest among them. Beer′s law is obeyed in the range of 0～1.6　mg/L　I-　for ethyl violet system, 0～1.4　mg/L for crystal violet system, and 0～0.8 mg/L I- for victoria blue 4R system, respectively. The method can be applied to direct determination of iodide in aqueous solution. The method has good selectivity. A large amounts of halide ions, some other inorganic acid group ions and amount of common metal ions don′t interfere the determination of I-. This method was used to determine I- in kelp, laver and soy bean with satisfactory results