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?

Answers were Sorted based on User's Feedback



In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution (..

Answer / 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

In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution (..

Answer / naveen

U CAN DECREASE THE FLOW RATE
AND INJECTION VOLUME

Is This Answer Correct ?    1 Yes 1 No

In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution (..

Answer / gaurav

You can increase the injection volume.Changing gradient
method is not required.

Is This Answer Correct ?    2 Yes 14 No

Post New Answer

More Analytical Chemistry Interview Questions

what is the working priniciple of ph, what are parts in ph meter

1 Answers  


Which detector is used in uv-vis spectrophotometer?

1 Answers   Glenmark,


why 1.2%kcl solution is using in limit os straylight?and why this test used for uv calibration?

1 Answers   Graviti Pharmaceuticals, Reddy Labs, Vimta Labs,


What is the difference between purge septum flow and column flow in gas chromatography?

0 Answers  


Why should we use Potassium iodide and Hydrochloric acid during preparation of Iodine Molar solution?

1 Answers  






What is the difference between Spectroscopy and spectrophotometry,What are the applications?

4 Answers   Caplin Point, Cipla,


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

0 Answers   Pfizer,


what is principal of karl ficher instrument!

12 Answers   Alkem Labs, USV,


What is the difference between GSC & GLC?

3 Answers  


defination of wavelength & wave number

4 Answers  


How do we fix the sample concentaryion in hplc method development. what is the basis?Thanks in advance

4 Answers   DRL, Glenmark, Orchid,


How to decide restandardisation due or retest or expiry of Volumetric solutions prepared in wet chemistry lab?

6 Answers   NCL,


Categories
  • Organic Chemistry Interview Questions Organic Chemistry (342)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1387)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (190)