DETERMINATION OF (METHYLCYCLOPENTADIENYL)MANGANESETRICARBONYL IN GASOLINE BY CAPILLARY GAS-CHROMATOGRAPHY WITH ALTERNATING-CURRENT PLASMA EMISSION DETECTION

Methylcyclopentadienyl)manganesetricarbonyl (MMT) commonly used as an antiknock agent in gasoline is determined by capillary gas chromatogra phy with an alternating current plasma (ACP) detector. The ACP selecti vity, the ratio of the peak area response of MMT per gram Mn to the pe ak area response for a hydrocarbon per gram of carbon, was found to ex ceed five orders of magnitude. Detection limits for MMT and a closely related organomanganese analyte, bis(pentamethylcyclopentadienyl)manga nese (BPM), were calculated to be 62 and 69 pg/s (as Mn), respectively . Precision of the methodology was 6.6% relative standard deviation (n = 10) for both MMT and BPM.