Method for verifying gas composition inside potato chip nitrogen filling package
Abstract: Potato chips are mostly packed in nitrogen-filled or modified atmosphere, which can prevent potato chips from being oxidized, not easily crushed, and extend the shelf life. Therefore, it is necessary to carry out key monitoring of the gas composition inside the potato chip package to prevent the quality problem of the decrease of the ratio of N 2 or CO 2 inside the package due to the tight sealing of the package or the poor barrier property of the packaging material . In this paper, the HGA-02 top air analyzer is used to test the internal gas composition of the potato chip nitrogen filling package, providing detailed technical reference for related industry users.
Key words: potato chips, nitrogen-filled packaging, N 2 ratio, O 2 ratio, headspace composition, headspace analyzer
1 , the status quo
Potato chips are fried foods, which contain a lot of oil and protein. Therefore, it is a problem that many potato chip manufacturers pay attention to to prevent the potato chips from appearing crisp and savory. At present, the potato chip packaging is divided into two types: bagged and barreled. The bagged potato chips are mostly made of aluminum-plastic composite film or aluminized composite film. The canned potato chips are basically made of paper aluminum-plastic composite barrel. The above packaging form can satisfy the comparison. High barrier and good sealing.
In order to ensure that the potato chips are not easily oxidized or crushed, the potato chip manufacturer fills the inside of the package with nitrogen ( N 2 ), that is, nitrogen- filled packaging, and relies on the inert gas of N 2 to prevent the presence of O 2 inside the package . If the packaging material used for potato chips has poor barrier to N 2 or the sealing of the potato chips is not tight, it is easy to change the content of N 2 or O 2 inside the packaging , so that the nitrogen-filled packaging cannot function on the potato chips. Protective effects.
In view of the above problems, we can use effective testing equipment to monitor the internal air content of the package, such as the head air analyzer, so as to grasp the specific proportion of O 2 and N 2 in the package, and timely control the quality of the finished packaging of the potato chips.
Figure 1 potato chip nitrogen filling package
2 , testing standards
At present, there is no targeted standard method for the detection of the top air body inside the domestic sealed package. However, there are many types of detection instruments for the top air body at home and abroad, and the technical level and accuracy of the instrument are also high, so the package is inside. The monitoring of the composition of the top air should have a certain universality. We will use the sample of the air-conditioning package (aluminum-plastic composite film) for the detection of the O 2 gas ratio.
3 , test samples
The finished potato chips produced by a factory are packaged.
4 , test equipment
The HGA-02 top air analyzer developed by Labthink .
4.1 Test principle
The top air body analysis often uses the sensor method to insert the sampler into the package to be tested, and collect a sufficient volume of sample gas from the headspace of the package. The sample gas is injected into the gas analysis sensor, and the test data is recorded after a certain test time or after the gas concentration value output from the gas analysis sensor is stabilized. The detection of each gas content requires the use of different gas analysis sensors. When detecting the O 2 content in the sample gas, the sample gas needs to be injected into the O 2 analysis sensor, and the sample gas is required when detecting the CO 2 content in the sample gas. Inject the CO 2 analysis sensor.
4.2 Scope of application
(1) This equipment is suitable for testing the content of O 2 and CO 2 in a packaging container such as a sealed packaging bag or a packaging container, and the mixing ratio thereof.
- Sealed bag: It is suitable for testing the content of O 2 and CO 2 and their mixing ratio in various bags such as ready-to-eat food, coffee, cheese, milk tea, milk powder, bread, soy flour, modified atmosphere packaging, and medicine .
- Packaging container: It is suitable for the test of the content of O 2 and CO 2 and the mixing ratio thereof in packaging containers such as canned coffee, canned milk powder, canned food, cheese, canned food, Tetra Pak, and beverage .
(2) This equipment can be tested to test the content of gas O 2 and CO 2 at the top of the ampoule and its mixing ratio.
4.3 Equipment parameters
- Test gas type: O 2 , CO 2
- O 2 or CO 2 measurement range: 0 ~ 100%
- O 2 measurement accuracy: 0% ~ 2% , ±0.3% (absolute value); 2% ~ 100% , ±0.5% (relative value).
- CO 2 measurement accuracy: 0% ~ 100% , ±0.5% (absolute value)
- The system is equipped with a bilingual operation environment in English and Chinese to meet the needs of users of different languages.
- Portable design, power and battery dual power mode, easy to use in the laboratory or production site.
- Support Lystem TM laboratory data sharing system to manage test results and test reports.
5 , the test process
(1) Take 5 samples with no obvious defects, leakage and good sealing, and stick the gasket to the part to be tested of the sample, pay attention to stick firmly to prevent air leakage.
(2) Turn on the instrument and warm up the instrument.
(3) Insert the sampling needle into the sample. After the sample is placed stably, the sampling needle is pierced into the middle of the sample into the inside of the sample, but the needle is prevented from being jammed or broken due to the needle being stuck into the package.
(4) Set test parameters such as test time, gas collection volume, etc.
(5) After the start of the test, the sampler automatically collects a sufficient volume of sample gas from inside the sample.
(6) The sample gas will automatically enter the gas analysis sensor through the injection port and pipeline.
(7) Record test data after a certain test time or after the gas concentration value output from the gas analysis sensor is stabilized.
6 , test results
Top average O 2 content ratio of the air within the body 5 samples was 1.6%, and the arithmetic mean deviation of the test value for each sample was not more than ± 10%. For nitrogen-filled packaging, the internal gas is mostly N 2 except for O 2 (because N 2 is an inert gas, no corresponding gas sensor has been developed at home and abroad), and the proportion of other gases is negligible, so The N 2 ratio content can be obtained by subtracting the proportion of O 2 from 100% .
7. Conclusion:
The HGA-02 top air analyzer can accurately and conveniently measure the content of O 2 and CO 2 in the hollow packaging containers such as sealed bags and ampoules, and the mixing ratio thereof. It is suitable for quickly and accurately evaluating the content and proportion of gas components in production lines, warehouses, laboratories, etc., thereby guiding production and ensuring shelf life. Labthink has been committed to providing professional inspection services and testing equipment to customers around the world. Over the years, it has provided thousands of packages of internal gas composition monitoring solutions to customers around the world, providing reliable data support. Understand information concerning the relevant testing equipment more packaging barrier properties, mechanical properties, etc., you can visit Labthink company to view specific information or call us. Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.
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