Answer Posted / sivasnkar ganesh malla

Generally organic acids are week acids than mineral acids. In this case acetic acid is organic acid so week acid than per chloric acid(mineral acid) perchloric acid dissolved in acetic acid due to INTER MOlecular HYDROGEN BOND is formed between perchloric acid and acetic acid

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2336

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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?

2305

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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.

2035

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in dissolution why pool sample needed? in which type of drug pool sample need?

3173

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what is mean by dissolution hydrodynamics?

819

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AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

2042

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Why to use propyl paraben in HPLC gradient calibration

7449

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Tell me about analytical method validation in QC

6170

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can i use hplc detector to uplc and why?

2277

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In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

914

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what is the structure of DOWEX-50

5503

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we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1863

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Why Ethanol is Used for Standardization of GC Head space?

4224

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How can the GC or HPLC method is selected to determine the impurity profile in drug product?

7586

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identification is for unknown? qualification for known? reporting for LOQ?

716

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