How to select buffer for HPLC mobile phase

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Accordingly compound PKa value

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i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

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How much is the standard area for glc analysis

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If suppose 10 methods of dissolution given in pharmacopoeial for single content product then which method out of 10? or all 10 require to follow?

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CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

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Basic principle of ESI?

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