Separation was carried out on a polyethylene glycol capillary column(Supelcowax- 10, Supelco, Bellefonte, PA) (60 m length, 0.32 mm id, 0.25 μm film thickness).
Separation was carried out on a polyethylene glycol capillary column(Supelcowax- 10, Supelco, Bellefonte, PA) (60 m length, 0.32 mm id, 0.25 μm film thickness).