Table 1.

General HPLC conditions.

Analytical Column	Thermo Betasil C8, 50 × 2.1 mm, 3 μm with Upchurch PEEK 0.5 μm prefilter
Guard Column	Thermo Betasil C8 3.0 × 30 mm, 5 μm
Column Temperature	30 °C
Sample Temperature	5 °C
Injection Volume	10–20 μL
Mobile Phase A	0.1% formic acid in water
Mobile Phase B	0.1% formic acid in acetonitrile