在没有共存氧化剂时亚硫酸盐对鲁米诺化学发光的影响及其分析应用(英文)

Effect of Sulfite on the Chemiluminescence of Luminol in the Absence of Co-Oxidizer and Its Analytical Application

亚硫酸盐在碱性条件下 ,产生化学发光 .罗丹明 6G可起增敏作用 .在优化的实验条件下 ,亚硫酸盐的测定范围为 0 0 5～ 2 μg/mL ,检出限为 0 0 4 μg/mL ,对 0 5 μg/mL的亚硫酸盐进行 11次测定 ,其RSD为 2 1%.将本法用于酒中亚硫酸盐测定 ,结果令人满意 .

A chemiluminescence(CL) flow system is described for the determination of sulfite based on the chemiluminescence(CL) emission produced upon mixing a sulfite solution with an alkaline luminol solution sensitized by rhodamine 6G. The system responds linearly to sulfite concentration in the range 0 052 μg/mL with a detection limit (3 σ ) of 0 04 μg/mL and relative standard deviation(RSD) of 2.1% for 0.5 μg/mL sulfite ( n =11). The system has been successfully applied to the determination of total sulfite in wines.