目的 对猪肉的腐败程度作出更加便捷的预测。方法 选取溴甲酚紫为反映猪肉新鲜程度的pH指示剂，添加甘油制成混合型气敏凝胶，并以棉质纤维纸为基材制备指示纸，利用涂覆设备在基材上涂覆指示剂。随后将制得的指示纸应用于猪肉。结果 经响应面法分析得到了最佳工艺组合，羟乙基纤维素添加量为1.70 g/(100 g)，甘油添加量为5.00 mL/(100 mL)，指示剂溶液添加量为9.00 mL/(100 mL)，涂覆厚度为4 mm。结论 猪肉腐败的程度与pH指示纸的颜色变化一致，具有一定的实际应用价值。

The work aims to make a more convenient prediction of the spoilage degree of pork. Bromocresol purple was selected as a pH indicator to reflect the freshness of pork. Glycerin was added to make mixed gas-sensitive gel. Cotton fiber paper was used as the substrate to prepare indicator paper. The indicator was coated on the substrate by coating equipment. Then, the prepared indicator paper was applied to pork. The results showed that the optimum process combination was obtained by response surface analysis, with hydroxyethyl cellulose addition of 1.70 g/(100 g), glycerol addition of 5.00 mL/(100 mL), indicator solution addition of 9.00 mL/(100 mL) and coating thickness of 4 mm. The spoilage degree of pork is consistent with the color change of pH indicator paper, which has certain practical application value.