核黄素在Na2 HP0 4 -NaH2 PO4 缓冲体系中有一灵敏的二阶导数极谱峰 ,含量在 0 2～ 15 0 μg/10ml内峰电流与含量呈线性关系 (相关系数r≥ 0 996 )。对 0 5和 3 0 μg/10ml核黄素标准溶液测定液 10次的RSD分别为 5 2 %和 1 6 % ,对同一样品进行 9次平行测定的RSD为 3 4% ,对样品进行两浓度水平加标回收试验 ,其回收率分别为 91 1%和 10 7 2 %。本法精密准确 ,简便易行可用于常见食品样品中核黄素含量测定 Riboflavin has a sensitive second derivative polarographic peak in the Na2 HPO 4 -NaH 2 PO 4 buffer system, with a linear relationship between the peak current and the content of 0 2 ~ 150 μg / 10 ml (correlation coefficient r ≥ 0 996). The 10 RSDs of 5 and 30 μg riboflavin standard solutions were 52% and 16%, respectively. The RSDs of 9 replicates of the same sample were 34%. The two concentrations Horizontal spike recovery test, the recovery rates were 91 1% and 10 7 2%. This method is precise and accurate, simple and easy to use for the determination of riboflavin in common food samples