I've got a Rtx35-amine column and have pretty good results with alkanolamines. But the triethanoleamine makes trouble, it has the highest bioling point( 360°C)and the reproducebility of the peak area is terrible. Column: 30 m; 0,32 mm; 1µm
Oven: 50°C to 220 or 280°C
Injektion: split with PTV, used with temperature programm and as a normal splitless at different temperatures, as well as on column, using a precolumn because of the small diameter of the column.
Solvent is MeOH.
Has anyone had a similar problem? I've heard, that this column should be very good for TEA.
Thanks for any idea!!
By Consumer Products Guy on Monday, June 14, 2004 - 07:44 am:
We derivative triethanolamine with BSTFA to make trimethylsilyl derivatives, your column sould be fine.
By SIELC_Tech on Monday, June 14, 2004 - 09:11 am:
Another alternative is to use HPLC for analysis of ethanolamines. Good retention and peak shape, no problem with retaining or eluting it from the column. This method requires MS or ELSD detection: