2.3. Diluent The diluent was prepared by mixing 2 mL of 85% phosphoric acid with 2 L of water. 2.4. System suitability solution We used a system suitability solution containing 25 lg/mL of each of the following compounds: tetracycline hydrochloride
2.3. DiluentThe diluent was prepared by mixing 2 mL of 85% phosphoricacid with 2 L of water.2.4. System suitability solutionWe used a system suitability solution containing 25 lg/mL ofeach of the following compounds: tetracycline hydrochloride