why the same column give different retention time in hplc?

Answer Posted / nabil

there are many resons for different RT
1-The pressure used(because that affects the flow rate of
the solvent)
2- The nature of the stationary phase(not only what
material is made of, but also particle size.
3-the exact compositionsof the solvent.
4-the temp of the column.

Is This Answer Correct ?    23 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

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

363


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2112


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

2475


what is %labelled amount in content uniformity of dosage unit and its calculation?

4633


How to know the estimated LOQ concentration in ppm

739






[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

359


in dissolution if one bowl got 70 percent 2nd bowl got 80 percent and 3rd bowl got 90 percent then how proceed?

341


if peak get problamatic then what require to do?

319


What is aggregate and fragments in SEC?

1589


what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

351


what is mean by extactable and leachable study?

576


what is third integration

1504


A ha tc is actual defination of retention time?

1067


If combination product how require to identify which imp is of which api?

328


How require to perform linearity as per ANVISA? What are the acceptance criteria?

729