Chromatograms of MgCp2 in bubblers from Company "A". Different processes were used to synthesize the MgCp2 in each bubbler. The MgCp2 in bubbler A2 was produced without using diethyl ether (CH3CH2OCH2CH3). Impurities in each bubbler could be removed by evacuating for a short period of time (~15 min.) at elevated temperatures (~50 °C) as shown in figure 3.