Abstract
A method to determine the amount of oil residues on heating-, ventilating- and air-conditioning(HVAC)-component surfaces was developed and validated. The sampling was based on two swiping methods and a filter contact method. Infrared spectrometry was utilised in the analyses. For the tested mineral oil the filter contact method showed the best recovery of the sampling 91±2%. The oil concentration is quite high but unequally distributed (530– 960 mg/ m 2 ) on the surface of the sheet metal treated with corrosion protection oil and low on the sheets treated with chromic acid (<2– 29 mg/ m 2 ). Oil concentration of studied HVAC components (14– 196 mg/ m 2 ) was dependent on the technique used for manufacturing the component.
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