小麦粉中甲醛本底值的测定

甲醛次硫酸氢钠是一种化工原料,国家已明令禁止将其作为添加剂加入食品。目前,还没有测定面粉中甲醛次硫酸氢钠的国家标准方法。本文用2002年国家质检总局推荐的方法对我国不同地区种植的122份小麦自磨粉的甲醛本底值进行了测定,进而为测定小麦粉中甲醛次硫酸氢钠含量提供科学依据。122份小麦自磨粉的本底平均值为3．85mg/kg,变幅为0．92～6．77mg/kg。95%概率下的置信区间最大值为6．31mg/kg,该数值即可作为运用该方法时所有小麦粉样品的甲醛本底值。

Determination of Background Value of Formaldehyde in Wheat Flour

Sodium formaldehyde sulfoxylate is a chemical raw material prohibited to be added into food as a food additive,There.There is no national standard method for determination of sodium formaldehyde sulfoxylate in wheat flour so far.In this paper,the background values of 122 wheat flour samples were determined with the method recommended by General Administration of Quality Supervision,Inspection and Quarantine in 2002.It was expected that the values can provide scientific principles for inspecting sodium formaldehyde sulfoxylate content in wheat flour.The average background value of the(formaldehyde in 122 wheat flour samples is 3.85mg/kg and the variations range is between 0.92mg/kg and 6.77mg/kg.For the 95% probability,the confidence interval range for the 122 wheat flour samples is from 1.40mg/kg to 6.31mg/kg,whereas the maximum confidence value of 6.31mg/kg can function as the background value of wheat flour this way.