Why we use caffeine for HPLC calibration in Detector wave
ength accuracy test
Answer Posted / som chauhan
caffine is primary standar recomanded in various
pharmacopia and it shows dual behaviour having different
wavelength 2 maxima 205nm,273nm and minima at 245nm.
SOM CHAUHAN R.K.LABORATORIES
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?
What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
all types of questions asked at the cipla interview
if you given one product then which tests you will perform?
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.
Is it nessesary all multimedia dissolution require descriminatory?
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 is the diffrence in japan mkt requirement in analytical method validation over US?
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
if content uniformity passing but dissolution varrying then what is next step?
on the basis of bcs class how to proceed the solubility?
why digestion require in icpms?
in which situation require to take incident in validation?
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.