Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


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

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,

0 Answers  


Why we use Caffeine in hplc calibration

2 Answers   Emcure, Laurus,


what r the reasons to get peak telling?

6 Answers   Cipla,


how do you established the RRF for unknown impurity

6 Answers   Square Pharma,


is there any exact definition for Theoritical plates ? chennu srinivas

5 Answers  


How to know the estimated LOQ concentration in ppm

0 Answers  


how much you expected salary?

7 Answers   GSK GlaxoSmithKline,


why we should take dst factor for below 1%moisture samples

0 Answers   Ind Swift Laboratories,


how will you do the prep for unstable componds?

0 Answers   AMRI, CTX Life Sciences, Piramal Healthcare,


What is mean by PDR?

0 Answers  


Explain about Low pressure gradient and High Pressure gradient systems in HPLC?

4 Answers   Mylan, Orchid, Roshanico,


why should we do limit of stray light in UV calibration and why should use potassium chloride

2 Answers  


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)