基于全程高通量氮气介导下婴幼儿辅食营养粉的品质调控研究

Research on quality control of infant nutrition packs mediated by high-flux nitrogen throughout the process

目的采用3种充氮包装技术制备了适用于6~36个月婴幼儿的配方营养包,并对储藏期间营养粉品质变化的差异性进行了研究。方法以冲调性和色度值为衡量指标,结合扫描电子显微镜(scanning electron microscope,SEM)、傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)、X-射线衍射分析(X-ray diffraction,XRD)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)等检测方法,对比分析了贮藏温度为(37±2)℃、相对湿度(relative humidity,RH)为75%、避免光线直射的条件下贮藏加速实验10 d的婴幼儿配方营养包内样品品质变化规律。结果与对照组(传统不充氮包装方式)相比,全程高通量充氮技术处理的婴幼儿配方营养粉的颗粒表面及内部结构变化小于对照组,且相对结晶度和热稳定性等变化均显著小于对照组(P<0.05)。结论全程高通量充氮技术处理能够延缓营养包劣变的变化速率,有效提高了婴幼儿配方营养包的贮藏稳定性。

Objective To prepare formula nutrition package for infants aged 6-36 months by using 3 kinds of nitrogen filling packaging techniques,and to study the difference of nutritional powder quality change during storage.Methods Taking the tonality and chromaticity value as the measurement index,combined with scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and other detection methods,the quality changes of samples in infant formula nutrition package were compared and analyzed under the conditions of storage temperature(37±2)℃,relative humidity(RH)75%and avoiding direct light for 10 days.Results Compared with the control group(traditional non-nitrogen-filled packaging method),the changes in the particle surface and internal structure of the infant formula nutritional powder obtained by the full-process high-flux nitrogen-filling technology were smaller than those of the control group,and similarly,and the changes in relative crystallinity and thermal stability were both significantly smaller(P<0.05).Conclusion The whole process of high-throughput nitrogen filling technology can successfully delay the changing rate of the nutrition package deterioration and effectively improve the storage stability of the infant formula nutrition package.