Early eluting compounds sometimes have poor peak shapes depending on method conditions. Some analytes may not fully focus onto the column well because the initial temperature may be too high. Polarity mismatch can also occur if a solvent doesn’t dissolve well in the phase. The solvent ‘pools’ on the column phase and is pushed down the column by the carrier gas. Some compounds travel with the solvent pools and may lead to tailing or split peaks.
Below are some steps that can be implemented to help minimize any distortions to early eluting peaks.