单扫示波极谱法测定食品包装材料中双酚A的研究

Determination of Bisphenol A in Food Packaging Materials by Oscillopolarogaphic Method

研究发现 ,在 0 .1 2 mol/L Na2 HPO4 - KH2 PO4 (p H7.5 )底液中 ,双酚 A于峰电位 (Ep) - 1 .0 V(vs.SCE)处产生灵敏的极谱还原波 ,该波的二阶导数峰电流 (ip)与双酚 A浓度在 2 .0～ 1 0 .0 mg/L范围内呈良好的线性关系 ,检出限为 1 .0 mg/L,萃取后测定 ,检出限为 0 .1 mg/L。本法操作简便、快速、准确。用于食品包装材料中双酚 A含量的测定 ,结果令人满意。

It is found on the solution of 0.12 mol/L Na 2HPO 4-KH 2PO 4 (pH 7.5), bisphenol A produces a sensitive reduction wave on the dropping mercury electrode at the petential of E p -1.0 V(vs.SCE). Second order derivative peak current is proportional to bisphenol A concentration in the range of 2.0~10.0 mg/L. The detection limit is 1.0 mg/L and 0.1 mg/L for extraction with diethyl ether. The method is simple, rapid and accurate. It has been applied to the determination of bisphenol A in food packaging materials. The result is satisfactory.