Answer Posted / suresh nuthi

Angastrong unit

what is partion and column chromatography

2382

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for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6063

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what is the purge flow & how to calculate

2638

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For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

4056

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In Dissolution Test why limit is define Q+5% what is the role of +5%.

3097

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If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

848

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how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

2593

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What is third generation HPLC Columns?

1979

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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?

2308

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is it nessesary to do solution stability for 7 days?

767

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effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

916

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in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?

717

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we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1866

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Tell me about analytical method validation in QC

6171

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What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

819

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