perchloric acid&glacal acetic acid both are acids but reaction is complete in volumetric titrations.how?1 7770
acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid3 7518
Column selection in HPLC method development?1 9081
How to prepare ppm solution of Nacl form its salt?5 51742
what is mean by assay?6 15151
why we are doing seal wash and needle wash?2 10630
which functional group we can detect in IR?3 8130
what is mean by UOD?2 6743
what is mean by content uniformity?5 6060
today i am doing calibration of HPLC. when i inject the blank it was going on -ve.(bleow then zero) why?3 6990
what are the sources in ELSD,PDA, RI and UV Detectors?1 5890
in karl fischer reagent which solvent is used for dissolving iodine sulphur dioxide and imidazole4 7106
why we are using benzene, anyline in acetic anhdride assay titration method?
What is FFA, PV, and PAV value in oil.
How to choose concentration of LOQ solutions for RS analysis? Example.
AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?
please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development
What is gelatinization?
How can the GC or HPLC method is selected to determine the impurity profile in drug product?
WHAT IS THE USE OF STARTER ?????????
is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth
How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain
What is viod volume and peak purity in HPLC?
what is definition of validation? which components are followed give detail?
How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.
Why to use propyl paraben in HPLC gradient calibration