Answer Posted / ravindra

First take ir of that sample and judge the functional
goroups attached to that compound and also structure of
that compound.
then check solubility.
then UV scan with known concentration and find lymda max.
then selection of column.
first try with regular solvent like water, acn,
methanol.and then go to the buffers of different pH.near to
its pka value.
also different coloumn.

for inorganic molecules require to do RS, Assay and disso?

734

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Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

2709

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How do we fix the sample concentaryion in hplc method development. What is the basis?

1210

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how can I make the copper get white bye any salt or acit?

2212

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what is partion and column chromatography

2392

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Why Ethanol is Used for Standardization of GC Head space?

4231

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Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

1471

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What is the difference between chromatographic purity and related substances?

1380

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What should be the level/ Percentage of Arsenic in Arsenic free zinc.

2233

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What is the diference between residual solvents and organic volatile matter

2057

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what is the purge flow & how to calculate

2648

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If inhouse hplc related substance method is completly diffrent from Usp for finished proďuct with diffrent impurities then how require to prove method equivalecy?

776

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what is classification of elemental impurities? what is risk assement in elemental impurities?

760

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in sampling of raw material which side is pasted sampled labels

1840

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What is control room temperature and which guide line says?

1640

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