Hi, I wanna know When the GC chroamtogram has tailing and band broading?! I studied all the situation that happened in but I couldnt solve it!?

I attached two GC chromatogram that one of them is the primary chromatogram that we obtain and other one is the same sample and same sample preparation after 1 month! why we have this tailing in...

09 September 2018 5,618 18 View