if v use HELIUM & ARGON instead of NITROGEN as a mobile phase what happen in GC SYSTEM ?5 8071
why we are using polystyrene film for calibration of I.R spectroscopy?12 47682
why we cannot analysis below 200nm in u.v?2 10747
significane of detector wavelength accrucy in calibration of hplc1 3889
signifcance of detector lenearity in calibration f hplc3 5132
verification of wave number why you are use in IR calibration2 4842
control of resolution in calibration of IR3 6131
defination of wavelength & wave number4 9097
what is difference between IR & FTIR ? how we calibarte both ? I want to know the procedure.7 80947
which brands HPLC COLUMN available in market11 13421
what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means
what is definition of validation? which components are followed give detail?
how to select short coloum and long coloumn for new molecule
What is the purpose of octyl silane columns?
For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?
What is the acceptance criteria for moisture balance when calibrated with sodium sulfate
function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?
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]
what is partion and column chromatography
Explain the relations between number of carbon atoms in alkanes and retention time ?
why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?
Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.
In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.
How can the GC or HPLC method is selected to determine the impurity profile in drug product?
what is the extinction coefficient for Indomethacin or at 319nm wave length.