Answer Posted / rahul chandra ( lupin research

We use only H2SO4 in diluted form for stabilization of potassium dichromate.

Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2216

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how you start the solubility study?

346

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How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1801

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what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3192

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What is the difference between chromatographic purity and related substances?

794

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why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

2349

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What is a difference between potency and purity?

647

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how to qualify the impurity?

328

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How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

2722

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is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1669

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function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

2073

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how you determine moist.of NaOH sol or NaOH flacks

1772

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How to set analyticl specification for combination products?

305

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Why sodium hydroxide used for maintain pH of phosphate buffer

1843

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why require to add enzymes in capsules dissolution only? is it require to tablet also?

272

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