Verification method of gas composition in nitrogen filled packaging of potato chips

Abstract: potato chips are usually packed in nitrogen filled or air-conditioned packaging, which can prevent the chips from being oxidized and crushed, and can also extend the shelf life Therefore, it is necessary to focus on the monitoring of the gas composition in the packaging of potato chips to prevent the quality problem that the proportion of N 2 or CO 2 in the packaging decreases due to the poor sealing of the packaging or the poor barrier of the packaging materials In this paper, hga-02 headspace gas analyzer was used to test the gas composition in nitrogen filled packaging of potato chips Key words: crisps, nitrogen filled packaging, N2 ratio, O2 ratio, headspace gas composition, headspace gas analyzer 1 The current crisps are fried foods, which contain a lot of fat and protein Therefore, to prevent crispy crisps, spicy crisps and other issues are the focus of many crisps production enterprises At present, the packaging of potato chips can be divided into bag and barrel The bag potato chips are mostly made of aluminum-plastic composite film or aluminum-plated composite film, and the can potato chips are basically made of paper aluminum-plastic composite barrel The above packaging forms can meet the requirements of high barrier and good sealing In order to ensure that chips are not easy to be oxidized or crushed, potato chip manufacturers fill nitrogen (N2) into the packaging, i.e nitrogen filled packaging, and rely on N2 inert gas to eliminate the existence of O2 in the packaging If the packaging materials used in potato chips have poor barrier to N2, or the packaging of potato chips is not tightly sealed, the content of N2 or O2 in the packaging can be easily changed, so that the nitrogen filled packaging can not play a protective role in potato chips In view of the above problems, we can use effective detection equipment to monitor the headspace gas composition in the packaging, such as headspace gas analyzer, so as to master the specific proportion of O2 and N2 in the packaging, and timely control the packaging quality of potato chips Figure 1 nitrogen filled packaging of potato chips 2 Test standard At present, there is no targeted standard method for the detection of headspace gas in domestic sealed packaging However, there are many kinds of headspace gas detection instruments at home and abroad, and the technical level and degree of the instruments are also high Therefore, the monitoring of headspace gas composition in packaging should have a certain universality We will use O 2 for the sample of air-conditioned packaging of potato chips (aluminum plastic composite film) Detection of gas proportion content 3 Test sample packaging of potato chips produced by a factory 4 Test equipment: hga-02 headspace gas analyzer independently developed by Labthink Languang company 4.1 test principle headspace gas analysis usually adopts the sensor method Insert the sampler into the package to be tested, and collect enough volume of sample gas from the headspace part of the package Inject the sample gas into the gas analysis sensor, and record the test data after a certain test time interval or after the output gas concentration value of the gas analysis sensor is stable Each kind of gas content detection needs to use different gas analysis sensors When detecting the O2 content in the sample gas, the sample gas needs to be injected into the O2 analysis sensor, while when detecting the CO2 content in the sample gas, the sample gas needs to be injected into the CO2 analysis sensor 4.2 scope of application (1) this equipment is applicable to the test of O 2 and CO 2 content and mixing proportion in sealed packaging bags, containers and other packaging containers Sealed packing bag: it is suitable for testing the content of O 2 and CO 2 in ready to eat food, coffee, cheese, milk tea, milk powder, bread, bean powder, modified atmosphere packaging, medicine and other packing bags and their mixing proportion Packaging container: it is suitable for testing the content of O 2 and CO 2 in the packaging containers such as canned coffee, canned milk powder, canned food, cheese, can, Tetra Pak packaging, beverage, etc and their mixing proportion (2) The equipment can be extended to test the content of O 2 and CO 2 in the top gas of ampoule bottle and their mixing proportion 4.3 test gas type of equipment parameters: O2, CO2 O2 or CO2 measurement range: 0 ~ 100% O2 measurement accuracy: 0% - 2%, ± 0.3% (value); 2% - 100%, ± 0.5% (relative value) CO 2 measurement accuracy: 0% - 100%, ± 0.5% (value) the system is equipped with bilingual operating environment in Chinese and English to meet the needs of users in different languages Portable design, dual power supply mode of power supply and battery, convenient for users to use in the laboratory or production site Support Lystem TM laboratory data sharing system, and manage test results and test reports in a unified way 5 During the test (1) take 5 samples without obvious defects, leakage and good sealing, and stick the gasket to the tested part of the sample Pay attention to stick it firmly to prevent air leakage (2) Turn on the power of the instrument and preheat the instrument (3) Insert the sampling needle into the sample After the sample is placed stably, insert the sampling needle through the middle part of the sealing gasket and enter the sample, but avoid the blockage or fracture of the needle caused by the sampling needle penetrating the articles in the package (4) Set test parameters, such as test time, gas collection volume, etc (5) After clicking to start the test, the sampler will automatically collect sufficient volume of sample gas from the inside of the sample (6) The sample gas will automatically enter the gas analysis sensor through the injection port and pipeline (7) Record the test data after a certain interval of test time or after the gas concentration value output by the gas analysis sensor is stable 6 The results showed that the average value of O2 content in the headspace gas of five samples was 1.6%, and the deviation between the test value and the arithmetic average value of each sample was not more than ± 10% For nitrogen filled packaging, except O2, most of the internal gas is N2 (because N2 is inert gas, no corresponding gas sensor has been developed at home and abroad at present) The proportion of other gases can be ignored, so the proportion of N2 can be obtained by subtracting O2 from 100% 7 Conclusion: hga-02 headspace gas analyzer can accurately and conveniently determine the content of O 2 and CO 2 and their mixing proportion in sealed packaging bags, ampoules and other hollow packaging containers It is suitable for quick and accurate evaluation of gas component content and proportion in production line, warehouse, laboratory and other occasions, so as to guide production and ensure shelf life Labthink Languang has been committed to providing professional testing services and testing equipment for customers around the world Over the years, Labthink Languang has provided thousands of monitoring schemes for gas composition in packaging for customers around the world, providing customers with reliable data support To learn more about packaging barrier, mechanical properties and other related testing instruments, you can log in Jinan Languang company to check the specific information or call for consultation Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.