Page 17 - Solutions for Plastic Evaluation

Impurities and Residues Evaluation of Raw Materials

GC

Analysis of Residual Organic Solvents in Flexible Packaging Materials
With such a high interest in security, safety, and health in recent years, measuring residual organic solvents in plastic products is now more
important than ever. Residual solvents are commonly analyzed using headspace gas chromatography, which involves placing the sample Plastic Materials Evaluation of
in a vial and heating it to a given temperature for a given time, and then injecting the resulting gas phase into a gas chromatograph.
This allows using simple pretreatment procedures to measure highly volatile components with relatively high sensitivity. Due to the simple
pretreatment, samples can be left in the vial for analysis.
Quantitative values from analyzing solids by headspace GC are calculated from the quantity of volatilized components in the gas phase
at a given maintained temperature. Therefore, unvolatilized components that remain trapped in the solid sample are not included in
quantitative values. Consequently, the method is used to measure and compare the quantity of volatile components evolved from different
samples under certain conditions. Raw Materials Evaluation of
In this example, flexible packaging material was analyzed using the residual solvent measurement method (manual HS method) specified in
the Control Devices Manual for Manufacturing Flexible Packaging Materials: Flexible Packaging Hygiene Association Edition.

Residual solvent measurement method (manual HS method) specified in the Features of Headspace
Control Devices Manual for Manufacturing Flexible Packaging Materials:
Flexible Packaging Hygiene Association Edition Methods
∙ Able to analyze highly volatile Product Evaluation
components (substances with low boiling
points) with high sensitivity
Silicone
septum for GC ∙ Maintenance is easy because non-volatile
components never enter the GC unit.
∙ Liquid samples containing components
Fold the sample into a 500 mL conical flask (sealed with a silicone rubber with high boiling points can be analyzed
0.2 m sample stopper modified to enable acquiring gas with a gas tight syringe). more quickly than by direct injection.
2
∙ Using a fully automatic headspace Product Information
sampler improves productivity.
Heat at 80°C for This method is not suitable for difficult-to-
Heat 30 min volatilize components.

Use a 5 mL gas tight syringe to acquire 1 mL of
GC-FID headspace gas from the conical flask and inject it
into the GC.
System Configuration
GC-2014 + GCsolution

Example of Fast Analysis of Residual Organic Solvents in Flexible Packaging Materials GC-2014 + GCsolution

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