Hi,
I see you need some help with optimization chromatography technique, well, I'm the right to this job. I work like two years in a Dominican goverment institute where give analytic support to Mypimes with chemical assys. I worked at Chromatography laboratories here.
First of all, I managed more GC-FID and GC/MS instruments, working with Food, Pesticides, Beverages, Chemical and Pharma(a little) samples, so have a good range of experience to give you a hand.
Besides, I was executive saler of some certified distributor of Consumibles in Chromatography and spectroscopy line, so I have knowledge in HPLC, ICP and other stuffs.
Its good to know whats exactly you need but I understand the discretion.