气相色谱质谱法测定面粉增白剂过氧化苯甲酰

Determination of benzoyi peroxide in flour by gas chromatography mass spectrometry

面粉中的过氧化苯甲酰经氧化后,用气相色谱质谱法测定其氧化产物苯甲酸的含量。方法的线性范围25～500μg/mL,检出限(10:1分流时)5.0ng,加样回收率为86.1％～105.9％,RSD为7.84％(n=5),该法可作为面粉及相关食品的质量监测方法之一。

The content of benzoyl peroxide in flour is determined by gas chromatography mass spectrometry(GCMS) . The linear range of the method is 5 - 100μg/mL, the detection limit is 0.5ng, the recovery is 89.2% - 105.9% and RSD is 7.45% . This method can be applied to the quality monitor of flour.