Answer Posted / rishabh

First of all check your compound solubility in which solvents then after that based on solubility the Mphase selection becomes easy if compound is soluble in aqueous medium check the pH of that medium than after further procced if not then check the solubility in organic solvents on basis of solubility and pH of the Mobile phase. Both Mobile phase selection and stationary phase are selected.

[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

795

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why we are using hexane in calibration of number of drop per mL

1739

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in hplc chromatogram started from left to right and in uv spectrum started from left to right

953

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mode of absorption in alimentary canal?

2392

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Is it nessesary all multimedia dissolution require descriminatory?

798

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Which parameters require to do in tech transfer?

755

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how you fix the limits of impurities?

837

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if identification threshold crosses the limits then what next step?

864

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Which are the diffrent grades of api in pharma?

772

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if rsd failed then what require to do?

838

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why xterra column require to use at higher ph?

920

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when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

2042

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What is a difference between potency and purity?

1221

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Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

741

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While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

2867

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