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Chromatography Research International
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Special Issues
Chromatography Research International
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2013
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Article
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Tab 7
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Research Article
Validated Stability Indicating RP-HPLC Method for Simultaneous Estimation of Codeine Phosphate and Chlorpheniramine Maleate from Their Combined Liquid Dosage Form
Table 7
Robustness studies.
Sl. no
Parameter
Modification
Retention time (min)
1
Flow rate
0.8 mL/min
3.2, 9.13
1.2 mL/min
3.31, 9.32
2
pH
2.8
3.63, 9.7
3.2
3.3, 8.9