Today, food packaging, pharmaceutical packaging, and other products are required to be observed by the company. Sample retention refers to materials and product samples that are kept by the company for quality traceability or investigation. According to the national "Product Quality Law", "Food Hygiene Law" and "Food Hygiene Code" related regulations, to ensure food hygiene and safety, prevent food poisoning accidents, identify the causes of food poisoning in a timely manner, and take effective treatment measures The implementation of a food sample retention system. However, over time, the influence of various factors, especially changes in the oxygen content, may lead to changes in the quality of the retained sample. How to ensure the quality of the sample, eliminate external factors, improve the accuracy of the data, so that the retention of observation becomes meaningful? The traditional way of keeping samples is to observe and test several samples. However, due to the difference in packaging materials, the difference in sample size and shape, and so on, the oxygen content itself is different, resulting in the final test data being incorrect. Shanghai Zulin's non-destructive O2 tester only needs to use one sample, and can accurately test the change of oxygen in the package at different time periods without destroying the package, effectively avoiding external factors. In order to better illustrate the important application of the non-destructive oxygen analyzer in the sample retention observation process, Shanghai Zulin staff specifically made relevant experiments. In order to better reflect changes in oxygen, the selected sample was a deoxidizer. Â 1. Put the deoxidizer into a soft bag and do not seal it. Put a fluorescent sensor on the inner wall of the deoxidizer package and use the probe to illuminate the fluorescent sensor. Â Â After four or five minutes, the oxygen content was again tested: 8.64% Â Â 5. As time passes, the oxygen content in the package changes. And then measured 5.53% The experiment shows that this nondestructive O2 instrument can rely on the fluorescence sensor film and rely on the probe to know the change of oxygen in the package at different time periods without destroying the package. It is of great significance in the observation of the remaining sample. The necessary testing tools for the observation of preserved samples in food packaging and pharmaceutical packaging. It can make the data more accurate without destroying the package. Â Floor Exhaust Fan,Electric Floor Fan,Industrial Floor Fan,Commercial Floor Fan Foshan kanasi electrical co.,ltd , https://www.fskanasifan.com
2. Record oxygen data 20.05% . At this point, because the soft bag is not sealed, this data is close to the normal oxygen content at atmospheric pressure. 
3 , after the bag is sealed and sealed, the oxygen absorber will consume the oxygen in the package, and then use the probe to irradiate the fluorescent sensor and record 14.71% of the oxygen data . 
