Mineral Oil Analysis in Recycled Fibre Food Packaging
Verify MOSH and MOAH compliance in recycled fibre packaging using accredited HPLC-GC-FID testing, validated functional barriers, and complete declarations of compliance.
Unresolved Complex Mixture Integration
Hump Area
Gas chromatography analysis of mineral oil fractions yields thousands of overlapping isomer peaks that form broad elevated baselines rather than discrete chemical peaks. Chromatographic humps represent complex mixtures of branched and cyclic hydrocarbons present in packaging extracts. Unresolved complex mixture integration defines the mathematical quantification of total chromatographic area falling between the baseline and the outer envelope of isomer signals.
Flame ionization detection generates signal response directly proportional to total hydrocarbon mass across the elution window. Accurate quantification requires establishing correct baseline start and end points to prevent including solvent or column bleed signals.
Construction Precision
Signal integration software requires clear parameters to differentiate natural biogenic background noise from mineral oil contamination humps. Analyst choices regarding baseline drawing method alter calculated mineral oil concentration values significantly. Applying unresolved complex mixture integration protocols according to standards like EN 16995 ensures consistent quantification of mineral oil saturated and aromatic hydrocarbons.
Internal standard peaks like cholestane or bicyclohexyl are subtracted or used as response markers to calibrate total integrated hump mass. Inconsistent baseline placement introduces significant analytical error when measuring low level hydrocarbon migration in food contact substrates.
Mass Calculation
Signal processing algorithms must exclude sharp discrete peaks originating from internal standards or biogenic plant waxes. Failure to cut discrete peaks from the integrated hump overestimates mineral oil content in paper packaging. Unresolved complex mixture integration forms the core signal processing requirement for mineral oil migration testing.