While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

962

in gas chromatography what is the difference between gas flow rate and average linear velocity ?

991

how to calibrate hplc & gc

3089

some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1136

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.

1197

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.

1587

what is peak purity and its formula

181

why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

916

Explain the relations between number of carbon atoms in alkanes and retention time ?

606

How we can determine water content in piperazine

872

What is aggregate and fragments in SEC?

628

what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

1177

what is the disso medium for tropsiun chloride

884

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1187

how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1075