宠物食品辐照灭菌及工艺剂量研究

本文以皮卷、绿爽洁牙骨、鸡肉排骨、鸡胸肉为试验材料，开展了宠物食品辐照灭菌工艺剂量的研究。结果表明：辐照剂量为4kGy时杀菌率达到了92%以上，辐照剂量为6 kGy时杀菌率已达99%以上，检测的各项微生物指标均符合国家食品卫生标准要求，10 kGy即可达到完全灭菌的效果。辐照前后4种样品中均未检出沙门氏菌。4～10 kGy辐照后，宠物食品中水分、脂肪、蛋白质、粗纤维、碳水化合物、矿质元素（除钙）及17种氨基酸的含量与对照相比差异均不显著，说明辐照对宠物食品的营养品质影响很小；在此剂量范围内，样品辐照前后的色泽、风味与滋味也没有明显变化。由此，确定宠物食品适宜的辐照工艺剂量范围为4～10 kGy。

The Irradiation Effects and Processing Dose for Pet Foods Decontamination

The applied dose range of irradiation processing of 4 kinds of pet foods had been studied. More than 92% microorganisms were inactive at the irradiation dose of 4kGy, while more than 99% were inactive at 6 kGy. The microorganisms loads of irradiated pet food by 8kGy met the requirement of national standards. The 10 kGy irradiation could sterilize the treated pet foods. Salmonella had not been checked in irradiated or un-irradiated samples. When irradiation dose ranged of 4～10 kGy, there was no significant difference on contents of moisture, fat, protein, coarse fiber, carbohydrates, minerals (not including Calcium) or amino acids between irradiated and un-irradiated pet foods. There was also no significant change on sensory quality of irradiated samples within this dose range. It is concluded that the recommended irradiation processing dose range for pet foods is 4～10 kGy.