HPLC Analysis of Exenatide Acetate on Proteomix^® SCX-NP5

column

Proteomix SCX NP5, 25 cm x 4.6mm I.D., 5 μm particles (Z777161)

mobile phase

(A) 10 mM monosodium phosphate:acetonitrile (56:44, v/v), adjusted to pH to 2.0 with phosphoric acid; ((B) 0.5 M NaCl/10 mM monosodium phosphate:acetonitrile (56:44, v/v), adjusted to pH to 2.0 with phosphoric acid)

gradient

0 to 65% B in 35 min; held for 5 min; to 0% B in 10 min

flow rate

1.0 mL/min

pressure

1653 psi (114 bar)

column temp.

40 °C

detector

UV, 235 nm

injection

20 μL

sample

0.325 mg/mL exenatide acetate in mobile phase A