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what is difference between assay&purity&potency?5 28268
From peak purity spectrum, where or at which point peak purity angle & purity threshold is checked?1 2472
what is concentration of oxygen in U.H.P. grade N2 cylinder1 3541
water is more polar than acetonitrile.but in reverse phase chromatography peaks elute earlier when we increse Acetonitrile.what is the reason.10 41120
I got 88.0 % assay for a drug in HPLC analysis for same injection i got 40.0% related substances is it possible? what is the relation between results of assay and purity?5 8655
hi i am m.sc organic chem and complete analytical lab tech dipolma now job in qc many time ask question you in m.sc organic why job in qc please help me i can not give proper ans please tell me3 8249
why use benzophenone & caffene acetone in hplc calibration1 14777
what type of questions asked on analytical balance and also give answers................all pharma companies?
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.
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.
How can we detect a compound in hplc which does not have any chromofore?
What is rs test why we are performing rs test?
Why perchloric acid used for potentiometric titration
In Dissolution Test why limit is define Q+5% what is the role of +5%.
Why sodium hydroxide used for maintain pH of phosphate buffer
How to choose the which salt is suitable for mobilephase
What is third generation HPLC Columns?
what is the difference between potentiometric titration and karl fischer titration?
How to determine water content of bis tetrazole amine mono ammonium salt
What are the primary considerations in extractables and Leachables ?
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.
Why Ethanol is Used for Standardization of GC Head space?