Printing inks used on packing materials of consumer products contain colorants and pigments, binder systems, solvents, and additives. ASTM F 1884-04 (1), Standard Test Methods for Determining Residual Solvents in Packaging Materials determines residual solvents in packaging materials from printing processes utilizing solvent-based printing inks.
Test method A recommends an autosampler to perform the headspace-gas chromatography examination of residual solvents in packaging materials. The Teledyne Tekmar HT3 automated headspace sampler will be used to meet the rigorous demands of ASTM F 1884-04. This method prepares a standard curve in the package sample matrix.
Standard PreparationA 20 μL/L 4-heptanone solution was used as an internal standard. A five-point calibration curve was prepared by diluting a commercially available residual solvent standard mix with the internal standard solution. A calibration curve was prepared by adding 2 mL of the standard or internal standard solutions into 22 mL headspace vials.
The samples were automatically injected onto a GC/FID system by the Tekmar HT3 automated headspace sampler.
Additional data for the HT3 and the new Versa automated headspace sampler using ASTM Method F1884-04 will be presented at the 2012 Eastern Analytical Symposium and Exhibition.
(1) ASTM Method F1884-04, Standard Test Methods for Determining Residual Solvents in Packaging Materials, ASTM International, West Conshohocken, PA, United States.