Answer / kizar ahamed

Column dimension (diameter) is different . In preparative
column we can give high flow rate (depends upon the
diameter)

Preparative column :9.4mm*250 5micron

Analytical column :4.6*250mm, 5micron

Answer / harry

analytical column is used for assay and purity study. while preparative column is used for synthesis when product recovery is concerned.

Answer / sujata

PREPARATIVE COLUMN IS ALSO USED IN THE CASE OF ISOLATION OF
IMPURITIES.

Answer / ankita

analytical column is used for testing (in small scale) where as preparative column is used when we are synthesizing in large scale.

What is meaning of audit trail in hplc

3 Answers   DRL, Lee Pharma, Raks Pharma,

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stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?

2 Answers   Nakoda Chemicals,

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What is column in chromatography?

0 Answers   Chembond Chemicals,

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when we have polar type of sample and solvnt hen which type of stationry phase we have to use

3 Answers  

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how to hplc calibrated

4 Answers   Dr Reddys, Glochem,

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What is the difference between Primay and Secondry Standard ?

6 Answers   College School Exams Tests, Neuland,

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Why pH lies between 0 to 14 only

4 Answers   PI Industries, Unimark Remedies,

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What is the deference between Residual solvents and OVI

1 Answers   RA Chem Pharma,

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Why linearity of detector performed in HPLC calibration

2 Answers   Cipla, Intas,

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In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution ( almost look like doublet). how can i get max resolution ? Is changing gradient method is usefull?

3 Answers  

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What are usp limits for total impurities,unknown impurity

1 Answers   Dr Reddys,

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why we use vanillin in melting range calibration

3 Answers  

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