In my analysis by HPLC,In sample main peak and placebo
peak are eluting with shorter resolution ( almost look like
doublet). how can i get max resolution ? Is changing
gradient method is usefull?
Answer Posted / wasim shaikh
You can try one or more of the following:
1) Changing the column type (c8 to c18, etc.)
2) Changing the Mobile phase composition (increase buffer
etc.)
3) Decrease the particle size on column (from 5 to 4, 3
etc.)
4) Increase the column length
5) Decrease the flow rate
6) If all of the above fails, then as you suggested,
gradient method can be used to separate the two peaks.
P.S. : Gradient method can also be used as an alternative
to the above methods and not necessarily the ultimate
solution.
| Is This Answer Correct ? | 32 Yes | 1 No |
Post New Answer View All Answers
If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?
What are the primary considerations in extractables and Leachables ?
cefoperozone and sulbactam inj. hplc test method
what is definition of validation? which components are followed give detail?
if instrument calibration fails then what require to do?
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?
which batch require to use for analytical method validation?
In which situation we require to prepare the standard solution from sample in Related substance method?
Which are the diffrent grades of api in pharma?
Many times I don't got a caffeine peak in calibration of hplc using guard column ❓
WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY
in sampling of raw material which side is pasted sampled labels
What are modes of quantification in related substances
My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
what are the standard methods for HPLC?