Answer Posted / jayesh patel

In low pressure gradient elution mixing of solvent done
before the pumps and in high pressure gradient elution
mixing of solvents done after passing from pumps.

how many types of balance calibration test?

2243

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For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1836

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What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2599

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how you start RS method development when for new product?

657

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

1147

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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

1800

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What is aggregate and fragments in SEC?

2056

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can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

2122

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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?

775

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HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

2186

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how require to set assay concentration for standard and sample?

861

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how will you do the prep for unstable componds?

1970

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How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

3162

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using gradient pressure in gas chromatography are not ?using gradient pressure why

3331

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why multimedia dissolution require to do?

724

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