CAJ | 학술논문

邻菲啰啉可与Fe3＋和Fe2＋结合形成不同颜色的金属配合物。利用亚硫酸对Fe3＋离子的还原作用,使邻菲啰啉-Fe3＋配合物转化为邻菲啰啉-Fe2＋,产生显著的光谱变化,据此建立测定亚硫酸盐的光谱分析法。研究结果显示,在pH5.00的乙酸钠-乙酸缓冲溶液中,亚硫酸盐的加入使体系在510 nm处的吸光度显著增强,在一定浓度范围内510nm处吸光度的增加值与亚硫酸盐浓度呈良好线性关系,其线性范围为1.08×10-6-1.60×10-5mol/L,检测限为1.08×10-7mol/L。本方法用于测定饼干中的亚硫酸盐,回收率为92.2%-101.8%。
린비라람가여Fe3＋화Fe2＋결합형성불동안색적금속배합물。이용아류산대Fe3＋리자적환원작용,사린비라람-Fe3＋배합물전화위린비라람-Fe2＋,산생현저적광보변화,거차건립측정아류산염적광보분석법。연구결과현시,재pH5.00적을산납-을산완충용액중,아류산염적가입사체계재510 nm처적흡광도현저증강,재일정농도범위내510nm처흡광도적증가치여아류산염농도정량호선성관계,기선성범위위1.08×10-6-1.60×10-5mol/L,검측한위1.08×10-7mol/L。본방법용우측정병간중적아류산염,회수솔위92.2%-101.8%。
Phenanthroline can interact with Fe3＋ and Fe2＋ to form metal complexes of different colors.Phenanthroline-Fe3＋ was changed to phenanthroline-Fe2＋ due to the redox reaction between sulfite and Fe3＋ with dramatic spectrum changes.Based on this,a spectrometric method for the determination of sulfite was developed.In pH5.00 NaAc-HAc buffer,the addition of sulfite to the phenanthroline-Fe3＋ system results in significant absorption increase at 510 nm which is proportional to the concentration of sulfite over the range of 1.08 ×10-6-1.60 ×10-5mol/L with a limit of detection of 1.08×10-7mol/L.The proposed method was applied to determine sulfite in biscuits,the recovery being 92.2%-101.8%.