In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution ( almost look like doublet). how can i get max resolution ? Is changing gradient method is usefull?3 7713
what is the need of calulation of RRF of impurity in HPLC analysis?9 20398
why SGF media used for dissolution . What is the use of it .can we use other media of lower pH instead ot this?1 5789
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me1037
How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.1097
only one end point is possible for citric acid and we get 2 end points for di acid why?3 4990
For Recent draft guidelines for Dissolution test apparatus calibration, why removing the salicylate tables?3 6150
what is the diff betwen calibration and system suitability?8 12374
why chiral separation?1 5565
what are the important specifications for a Column ?2 6627
What is the principle of Thermal conductivity detector and FID?
why we are using benzene, anyline in acetic anhdride assay titration method?
In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]
EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE
what is difference between zero air gas and o2 gas
what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?
What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
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?
What is the difference between purge septum flow and column flow in gas chromatography?
sop of a uv visible spectrophotometer double beam elico model
Why dissolution test is not performed in all of the products
Identify problem faced when mass spectroscopy is used with HPLC system ?
In dissolution test s1 stage we are getting one bowl 40 % out of 6 bowls what is the root cause you find and how proceed next step? ( Q is 80%)
WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?
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.