S. No

Peak label

Retention time

Area%

Observed mass

About the peak

1

Peak-1

8.0

10.59

322.02 (M + H)

Des sulphur impurity

2

Peak-2

9.28

55.0

370.05 (M + H)

Lansoprazole

3

Peak-3

10.47

24.48

354.03 (M + H)

Sulphide impurity