高效液相色谱-荧光检测法测定葡萄酒中总亚硫酸盐

 摘要：建立了测定葡萄酒中总亚硫酸盐的高效液相色谱方法。N-（9-吖啶基）马来酰亚胺与样品中亚硫酸盐反应生成一种较强的荧光络合物，利用荧光检测器进行检测。方法具有样品用量少、操作简便、灵敏度高等特点，回收率为98.0％～103.0％，相对标准偏差小于4.6％。

Determination of total sulfite in wine by high performance liquid chromatography(HPLC) with fluorescence detection]

A highly sensitive fluorometric method for the determination of total sulfite in wine is reported. The strong fluorescent derivatives formed by the quantitative reaction of sulfite in wine and N-(9-acridinyl) maleimide(NAM) in aqueous solution under mild conditions was injected into the HPLC. Separation was performed on an ODS column(200 mm x 5 mm) with a mobile phase of V(CH3CN):V(0.1 mo/L NH4AC) = 25:75 at a flow rate of 1.0 mL/min and detected by fluorometry at 455 nm(excitation at 365 nm). There was a good linear calibration curve in the range from 0.25-4 mg/L(r = 0.9998), The limit of detection was 1 ng. Sulfite mass concentration in wine has been determined by this method with good results and recoveries. This method is simple, rapid and reliable, and a sample size of only 1 mL is required to complete an analysis.