today i am doing calibration of HPLC. when i inject the
blank it was going on -ve.(bleow then zero) why?
Answer Posted / m.kiran reddy
Negative peak simply indicate that your mobile phase
absorbs UV light.So use only HPLC grade solvents.Even with
HPLC grade solvents you get the negative peaks you system
might not be working properly.
Regards
M.KIRAN REDDY
| Is This Answer Correct ? | 2 Yes | 7 No |
Post New Answer View All Answers
For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?
In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.
why we are using hexane in calibration of number of drop per mL
if you get peak in blank then what require to do?
if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?
What is shaking level in GC?
Difference between hlaf and rlaf
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,
what type of question will ask in the interview of lab chemist.
how you start RS method development when for new product?
In performance Check of GC Why Hexadecane Peak is ConsideredÂ
Tell me about analytical method validation in QC
How to calculate coreletion coefficient
Why sodium hydroxide used for maintain pH of phosphate buffer
Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?