Why tailing is coming in GC?

Tailing in gas chromatography (GC) occurs when the analyte peak exhibits a longer tail on one side, often due to factors like column overload, inadequate column temperature, or interactions between the analyte and stationary phase. It can also result from the presence of impurities or degradation products that interfere with the separation process. Proper column selection, temperature optimization, and sample preparation can help mitigate tailing effects.