Answer Posted / siva

it has the valency+3 and it is very stable compare to other metals(i.e, other metals intensity will disappears fast compare to lead intensity)

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3818

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could negative ions be produced by bombardment process in mass spectrometry?

1720

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How we can identify process related and degradation impurity in single method with short period?

758

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in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

776

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some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

2597

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What are modes of quantification in related substances

2111

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Why use only methanol,used determinationof moisture content not use other solvents

1361

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what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

1972

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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.

1985

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Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

1633

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In which situation we require to prepare the standard solution from sample in Related substance method?

711

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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?

2262

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How can I develope method of dissolution by HPLC OR UV

2348

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Why sodium hydroxide used for maintain pH of phosphate buffer

2331

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What is diffrence between extractable volume and deliverable volume? Answer pls

4497

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