Calculating %Assay for HPLC Stability Study

  • Thread starter Thread starter ChemiePham
  • Start date Start date
Click For Summary
SUMMARY

The discussion focuses on calculating the %assay for active ingredients and degradants in a stability study using High-Performance Liquid Chromatography (HPLC). The user has successfully calculated concentration based on response factors but is uncertain about analyzing peak height versus peak area. Key considerations include the resolution of degradants from the active peak and the relationship between response and concentration. The conversation emphasizes the importance of understanding these parameters for accurate assay calculations.

PREREQUISITES
  • Understanding of High-Performance Liquid Chromatography (HPLC) principles
  • Knowledge of response factors in quantitative analysis
  • Familiarity with peak area and peak height analysis
  • Concept of resolution in chromatographic methods
NEXT STEPS
  • Research methods for calculating %assay in HPLC stability studies
  • Learn about the impact of peak resolution on quantitative analysis
  • Explore the differences between peak area and peak height in HPLC
  • Investigate response factor calculations for HPLC assays
USEFUL FOR

Analytical chemists, quality control professionals, and researchers conducting stability studies using HPLC who need to accurately calculate %assay for active ingredients and degradants.

ChemiePham
Messages
3
Reaction score
0
I am running a stability study and have assayed by HPLC my t=0 timepoint. I only have the range of concentrations for the formulations...how do I go about calculating the %assay for the active and degradants?

I ran a standard during the run and have calculated the concentration by based on my response factor but after that I am stuck...
 
Chemistry news on Phys.org
When you ran the study, did you obtain data? Are you analyzing your materials by peak height or by area? Are the degredants well resolved from your peak of interest? How does the response... either by peak area or peak ht., vary with concentration? Is the peak ht. or peak area of your test material between that of the low concentration and high concentration of your standards?
 
chemisttree said:
When you ran the study, did you obtain data? Are you analyzing your materials by peak height or by area? Are the degredants well resolved from your peak of interest? How does the response... either by peak area or peak ht., vary with concentration? Is the peak ht. or peak area of your test material between that of the low concentration and high concentration of your standards?

Hi,

I am really having a sort of confusion here and I think that I have to search about this little much, by far it is like a sort of question that I am some where thinking of as, please if you find some good knowledge about this then do let me know.


Thanks!
 

Similar threads

  • · Replies 131 ·
5
Replies
131
Views
11K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 2 ·
Replies
2
Views
4K
Replies
5
Views
6K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
4
Views
2K