what is the defferance between the potency and working standard1 2990
what is the principle involved in determination of moisture content?3 6987
what is difference between assay&purity&potency?5 23162
why we do the calibration of limit of stry light in hplc & uv1318
From peak purity spectrum, where or at which point peak purity angle & purity threshold is checked?1 1454
what is concentration of oxygen in U.H.P. grade N2 cylinder1 2841
water is more polar than acetonitrile.but in reverse phase chromatography peaks elute earlier when we increse Acetonitrile.what is the reason.10 34145
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 6901
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 6988
why use benzophenone & caffene acetone in hplc calibration1 11857
in gas chromatography what is the difference between gas flow rate and average linear velocity ?
How to determine water content of bis tetrazole amine mono ammonium salt
We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?
what is the origin to prepare standard operating procedure
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?
why we should take dst factor for below 1%moisture samples
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.
In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )
why we are using hexane in calibration of number of drop per mL
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.
1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
what is procedure of actual procedure for registration of drug?
why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?
how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.