响应面法优化食品包装内衬纸中可转移性重金属醋酸的提取条件

摘要

目的：为了科学、真实地反映食品包装内衬纸中重金属(As、Pb、Cr、Cd)的迁移量。方法采用醋酸对内衬纸中可转移性重金属进行萃取,并利用单因素分析和响应面方法中的Box-Behnken模型(BBD)优化了醋酸提取内衬纸中可转移性重金属的条件。结果适宜的提取条件为：样品称样量1.0 g,醋酸浓度4.0%,萃取时间4 h,萃取温度60℃,在此条件下内衬纸中可转移性重金属的理论提取含量分别为铅1.44 mg/kg,砷0.105 mg/kg,镉0.081 mg/kg,铬4.31 mg/kg。结论预测值与测定值相对误差分别为0.35%,3.97%,4.54%和0.97%,与理论预测值相差不显著,具有很好的实用价值。%Objective To reflect the migration of heavy metals (As, Pb, Cr, and Cd) in food packag-ing lining paper by using acetic acid. Methods By using single factor analysis and response surface method in the Box-Behnken model (BBD), the conditions of the transferrable heavy metal extraction by acetic acid in food packaging lining paper was optimized. Results The extraction condition for the sam-ple was: 1.0 g of sample, 4% acetic acid, extraction time 4 h, extraction temperature 60 ℃, and the theo-retical extraction content of heavy metals in food packaging lining paper was 1.44 mg/kg of Pb, 0.105 mg/kg of As, 0.081 mg/kg of Cr, and 4.31 mg/kg of Cd, respectively. Conclusion The relative error be-tween the prediction value and the measured value was 0.35%, 3.97%, 4.54%and 0.97%, respectively, and the predicted values did not differ significantly with the theoretical values, which showed an important practical value.