1. The dual wavelength UV spectrophotometry of amoxicillin and cloxacillin in the compound preparation was studied.

2. OBJECTIVE:To determine ampicillin sodium and cloxacillin sodium for injection by RP HPLC.

3. A diagnosis of ampullar impetigo was made and she received cloxacillin for 3 weeks without improvement.

4. A convenient and accurate HPLC method to determine ampicillin and cloxacillin in ampicloxacillin sodium for injection was established.

5. OBJECTIVE To establish an ion-pairs HPLC method for the assay of ampicillin sodium and cloxacillin sodium in injection.