The online headspace analyzer is based on the optical sensing fluorescence attenuation method. The headspace analysis process does not sample the sample and has no requirements on the headspace sample gas volume or headspace conditions (such as negative pressure). Only 0.1 ml of sample gas is needed to complete accurate analysis. It is a multi-functional analyzer commonly used in the pharmaceutical industry to analyze headspace residual oxygen and dissolved oxygen.
The gases remaining inside the packaging cannot be ignored simply because the packaging process is complete. The gas composition inside the packaging is difficult to control or alter using other technologies from the time of filling until the product is opened and used. Barrier packaging materials can only hinder gas penetration into/out of the packaging material; they cannot eliminate existing gases such as oxygen inside the packaging (excluding cases where oxygen removal technology is added to the packaging). If the residual gas content exceeds the high concentration requirements for product preservation, no matter how good the high-barrier material or how perfect the sealing packaging, it will not meet the product's shelf-life requirements.
So what problems might we encounter during the use of an online headspace analyzer? Let's discuss them in detail below.
1. If the packaging has a certain degree of vacuum (negative pressure), sampling will fail, which will cause the analyzer to alarm and affect the test data.
2. For glass containers, the sampling needle cannot penetrate, resulting in the inability to detect the substance.
3. The headspace volume inside the packaging is too small. Generally, a sample gas volume of less than 5ml is insufficient for the sensor to react, resulting in inaccurate test results.
4. Packaging containing liquid with a small headspace allows liquid to easily enter the sensor during sample gas analysis, potentially causing equipment damage.
