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目的探究不同温度、过氧化氢酶浓度、反应时间等对牛皮中过氧化氢分解速率的影响规律,以此指导生产中如何控制狗咬胶中过氧化氢残留量超标的问题。方法以生产宠物狗咬胶的漂白牛皮为原料,通过采用不同温度(30~70℃)的水和不同浓度(3%~5%)的过氧化氢酶溶液进行处理,对处理后的过氧化氢残留量进行测定。结果采用50℃温水浸泡漂白牛皮可以较快地去除其中残留的过氧化氢;或者采用浓度为3%的过氧化氢酶溶液,40~50℃,浸泡30 min左右可以更快地去除过氧化氢。根据处理条件的不同,通过试验拟合出方程可以比较准确地计算去除漂白牛皮样品中残留过氧化氢所需要的大体时间。结论通过热处理或者过氧化氢酶溶液处理,能够有效降低漂白牛皮中残留的过氧化氢含量,使最终产品符合要求。
Objective To investigate the effect of different temperature, catalase concentration and reaction time on the decomposition rate of hydrogen peroxide in cow hide, and to guide how to control the excessive hydrogen peroxide residues in dog chew gum in the production. Methods The bleached cowhide produced by pet dog chewing gum was used as raw material, and treated with water of different temperature (30 ~ 70 ℃) and catalase solution of different concentration (3% ~ 5%), Hydrogen residual amount was measured. Results The bleached cowhide was soaked in warm water at 50 ℃ for faster removal of hydrogen peroxide. Alternatively, 3% catalase solution was used at 40-50 ℃ for 30 min to remove hydrogen peroxide . Depending on the processing conditions, the approximate time required to remove residual hydrogen peroxide from bleached cowhide samples can be calculated more accurately by fitting the equation to the test. Conclusions The heat treatment or catalase solution can effectively reduce the residual hydrogen peroxide content in bleached cowhide so that the final product meets the requirements.