Answer Posted / mayank sanghvi

Purity Tests: to ensure that all the analytical procedures performed allow an accurate statement of the content of impurities of an analyte, i.e.
related substances test, heavy metals, residual solvents content, etc.

Assay (content or potency):
to provide an exact result which allows an accurate statement on the
content or potency of the analyte in a sample.

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.

1984

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In which situation we require to prepare the standard solution from sample in Related substance method?

710

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Why we check moisture,ash & AIA in product

1819

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what you do when compound having dwel wavelength?

700

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

1658

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if you given one product then which tests you will perform?

662

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How much is the standard area for glc analysis

2209

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[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

706

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Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

2827

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how the compound separate in coulunm,explain

2440

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what is mean by nitrosamine impurities?

1016

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For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

2259

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In rs method development when we are going area normalization method to dilute standard method?

1473

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how to decide for one product require water content or LOD?

722

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1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

1789

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