Why we use caffeine for HPLC calibration in Detector wave
ength accuracy test
Answers were Sorted based on User's Feedback
caffeiene having different wavelents it having 2 maximas
and 1 minima.
1st maxima is 205nm
2nd maxima is 273nm
minima is 245nm
and it is primary reference standard and also suggested in
pharmacopiea.
It is very stable, we can use a long time foranalysis
i.e. it is not degradable
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / raja
#It will detect the detector wawelenth at multiple
wavelenth.
#it can be more stable and this solution can be store for
long time.
#It is cheap in market and it is easily and completely
dissolved in methonol.This solvent also cheap thats why
more chemists like to use caffene for HPLC Calibration in
detector wavelenth accuracy test.
Is This Answer Correct ? | 0 Yes | 0 No |
i said one my interview it is low cost,multiple wave lengths but these are not correct he said.any person know exact reason tell me.
but i think in uv spectroscopy some electronic bonding,non bonding transitions by c-n,c=c,c=n,n-o interactions.then it gives different wavelenghths with in the uv region only other compounds its not easily detectable
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / satish setti
1.caffine having mulltiple wavelengths 205,254,273nm.so we can use it at multiple wavelengths.
2.it is primary standard so stable un nature.
3.availability and freely soluble in methanol.
Because of above reasons caffine can be used in calibration.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / madhan rahul
Caffeine is the universal primary standard and it is recamanded by pharmacopiea.
Caffeine having variable wavelengths maximum at 204 ,273 and minimum is 245 nm.
It is freely soluble in water and also stable in room temperature.
Its highly polar and elutes all C 18 columns at Retention time about 2 minutes.
In pharma maximum products are using 200 to 300 nm only so caffeine is used for detector calibration.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / avadhesh sachan
caffeine is easily available in market, having very low cost, there is no need to cleaning of HPLC after calibration, its having two maxima(205 & 273 nm) and one minima 245
avadhesh sachan from Raptim Research Navi mumbai
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / pratik sutar
It shows multiple wavelength response like 205,245,273
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / shahjahan bano
caffeiene having different wavelents it having 2 maximas
and 1 minima.
1st maxima is 205nm
2nd maxima is 273nm
minima is 245nm
and it is primary reference standard and also suggested in
pharmacopiea.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / ajay chansoriya
caffeine having different wavelengths,
1st maxima is 205nm
2nd maxima is 273nm
minima is 245nm
and it is primary reference standard and also suggested in
pharmacopiea.and available easily to market.
Cost is very less, and can be store for long time.
Ajay Chansoriya
Alembic Pharmaceuticals
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / nandkishor (dr reddys lab
because caffiene and Erbium perchlorate also, are detected
in both uv and visible range
Is This Answer Correct ? | 2 Yes | 3 No |
in each media we require to use SLS? how to proceed?
WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY
4 Answers Avon Organics, Dr Reddys, Reddy Labs,
How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?
What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3
2 Answers Dr Reddys, IPCA, Reddy Labs,
In GC and HPLC ,how we can decide which of following method will be suitable or use for quantitation of chromatogram at the time of method development. 1.Area Normalisation 2.External standard method 3.Internal standard method
Optical Rotation*0.9477*100*200] Assay Of dextrose= ________________________________ 99.8* 200 why Factor=0.9477
1 Answers Claris Lifesciences, Inven Pharmaceuticals, Levo,
Why irmoisture balance is used for corrugated box moisture testing
Give me details about dissolution , with name ?
why sucrose not used in polarimeter calibration?
Why chromic acid wash is not recommended by USP for glassware cleaning?
Why base line not start from zero in GC Chromatography analysis.
if out of two set of results of moisture analysis first 1 is passing, second one is failing, is it oos ? or vice a versa first 1 is failing and second one is passing. for information mean value to be reported and in mean value the substance is ppassing, is it oos or normaal mean value to be considered?