In GC and HPLC ,how we can decide which of following method will be suitable or use for quantitation of chromatogram at the time of method development. 1.Area Normalisation 2.External standard method 3.Internal standard method

1 Answers   Atul,

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what is relationship between absorption and transmittance in u.v.?

11 Answers   Orchid,

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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.

0 Answers  

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why reference flow required during hplc analysis on rid?

1 Answers  

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What is the reason of RT change in new column v/s old column in HPLC

3 Answers   Apex,

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On which pharmacopoeia basis we can calibrate instruments like HPLC,GC,UV,DISSO,IR etc...

9 Answers   Cipla, Laurus, Micro Labs,

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what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

0 Answers  

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How to calculate %w/w and %v/v of a component(or solvent)by NMR

1 Answers   ACME, Vimta Labs,

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what are the primary standards of redox titrations?Name any two.

2 Answers   Laurus,

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why in uv we take k value less than 1

2 Answers  

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Why we are using only KBr in IR spectrometer why not KCl

10 Answers   Dr Reddys,

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How can we separate Urea & semicarbazide in single HPLC method ?

2 Answers  

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