Abstract
Abstract A size exclusion liquid chromography (HPSEC) method using refractive index (RI) and photodiode array (PDA) detectors and a BASIC calculation program was developed for high molecular weight contaminant determination in the C15 linear paraffin-based cold rolling oil. Eight laboratory standards were analyzed to determine the new HPSEC/RI calibration factor for the C15 linear paraffin rolling oil. Three contaminants and thirteen standard solutions were evaluated to establish calibration curves. The HPSEC/RI/PDA method will quantitatively determine the concentrations of polyisobutylene-based hydrodynamic backup bearing lubricant, mist-applied extreme pressure gear oil for the workroll bearing and antiwear hydraulic oil in the cold rolling oil. Deviations for backup bearing lubricant, workroll bearing lubricant and hydraulic oil are approximately 3%, 4% and 7% of the contaminant concentration, respectively. The BASIC calculation program can assist operators in reducing calculation error and improving s...
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