Answer Posted / tushar

4-7.5pH

Why Ethanol is Used for Standardization of GC Head space?

3722

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

6865

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

462

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

366

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why salisylic acid not using now days for disdolution calibration?

305

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Why to use propyl paraben in HPLC gradient calibration

6100

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if identification threshold crosses the limits then what next step?

337

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What is the difference between chromatographic purity and related substances?

790

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What is the difference between purge septum flow and column flow in gas chromatography?

1838

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Which are the diffrent grades of api in pharma?

315

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In performance Check of GC Why Hexadecane Peak is Considered 

2554

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why does used dry caffien in HPLC calibration?

1567

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what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1803

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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?

1606

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how to calibrate hplc & gc

4035

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