We all know that packaging materials after printing have different degrees of odor, depending on the composition of the ink and printing method.
First of all, it should be noted that the emphasis is not on what the smell is like, but on how the packaging that is formed after printing affects the substance of its contents.
The contents of residual solvents and other odors on printed packages can be determined objectively by GC analysis.
In gas chromatography, even small amounts of gas can be detected by passing through a separation column and being measured by a detector.
The flame ionization detector (FID) is the main detection tool. The detector is connected to a PC to record the time and the amount of gas leaving the separation column.
The free monomers can be identified by comparison with known fluid chromatography.
Meanwhile, the content of each free monomer can be obtained by measuring the recorded peak area and comparing it with the known volume.
When investigating the case of unknown monomers in folded cartons, gas chromatography is usually used in conjunction with mass method (MS) to identify the unknown monomers by mass spectrometry.
In gas chromatography, the headspace analysis method is usually used to analyze a folded carton, the measured sample is placed in a sample vial and heated to vaporize the analyzed monomer and enter the headspace, followed by the same testing process described earlier.
Post time: Apr-12-2023