Why we use caffeine for HPLC calibration in Detector wave
ength accuracy test
Answer Posted / k,praveen kumar
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 ? | 379 Yes | 13 No |
Post New Answer View All Answers
What is mean by PDR?
What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)
What are the primary considerations in extractables and Leachables ?
what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?
In Dissolution Test why limit is define Q+5% what is the role of +5%.
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
How require to perform linearity as per ANVISA? What are the acceptance criteria?
why require to do water content for drug product?
How can the GC or HPLC method is selected to determine the impurity profile in drug product?
What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?
how can I make the copper get white bye any salt or acit?
how to set sample and standard concentration in RS method?
when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.
From where require to take the RLD sample?