Table 1.

Gradient profile. Gradient profile used for the separation of PEth with the HPLC method.

	Mobile phase
Time (min)	%A	%B	%C
0–3	85	1	14
3–8	85-63	1–23	14
8–12	63-36	23–50	14
12–13	36-0	50–86	14
13–23	0	86	14
23–28	0–85	86-1	14
28–58	85	1	14

A Hexane

B Propan-1-ol:water; 17:3 v/v

C Propan-1-ol:acetic acid:triethylamin; 316:16:1 v/v