食物中残留甲醛含量的测定

Determination of Formaldehyde Content in Food

采用先浸提后蒸馏的方法对干燥食品样品进行前期处理,基于H3PO4介质中甲醛催化溴酸钾氧化溴甲酚紫的褪色反应,建立了测定甲醛含量的新方法.该方法的线性范围为0.1092-0.3120 mg/L,检出限为4.7×10^-5g/L.

Using pretreated method of distillation for drying food samples after soak and extraction,a new method of determined formaldehyde conten has been established in the catalytic reaction of formaldehyde on the oxidatic fading Bromocresol purple with potassium bromate in H3PO4 medium.Linearity of this methods ranged from 0.1092 mg/L to 0.3120 mg/L,limit of detection was 4.7×10^-5g/L.