Answer Posted / durga

related substances mean process related compounds and degradation compounds of drug substances or products.

Impurity profile is a description of the identified and unidentified impurities present in a typical batch of API or products.(Terms such as byproduct, transformation products, degradation products, interaction products, esidual solvents,related products and toxic impurities)

In which situation we require to analytical method validation of excipient?

733

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How to calculate coreletion coefficient

1635

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Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

2776

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if content uniformity passing but dissolution varrying then what is next step?

817

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Difference between the quantitative analysis and qualitative analysis?

1106

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How will u perform degradation study in detectors other thann PDA in HPLC Methodology

2477

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why require to do water content for drug product?

779

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how much mass should be there in volumetric flask while in preparation of sample for assay? 

2512

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if you have given one product then how you determine the impurity in that?

691

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How to establish relative response factor for hplc. Why it is required?

1150

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How to set specification of assay, fisdolution and related substances?

823

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for which product require to do content uniformity? what is limit of cu?

744

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We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

1832

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Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .

853

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How can we calculate offset value pH measurment

1463

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