Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In dissolution test s1 stage we are getting one bowl 40 % out of 6 bowls what is the root cause you find and how proceed next step? ( Q is 80%)

Reddy Labs,

1 1116

why we inject sample TWICE in ASSAY by HPLC analysis but in RS once?

Aurobindo, Neuland, DRL,

4 6034

What id the resolution factor

1 1871




what is a placebo peak

GMP Pharma, Optimus,

2 2322

what is the effect of injection volume calculate flow rate in perkin elmer headspace? (ccm parameter in HS)

1 783

How can we calculates the solubility of the drug in different medias by injecting in to hplc????(solubility studies)

Super Pharmaceuticals,

2 1939

What is the use of Holmium (III) Oxide???

Finar Chemicals,

1 2744

India is. Under which zone as per QF1.?

Aurobindo, Gland Pharma, Acebright,

4 6673




how to calculate the Step and ripple accuracy for pump gradient test for UPLC?

Wockhardt,

1 3381

why salicylic acid not use for dissolution.

Cipla, Indo Baijin Chemicals,

1 2625

Which water can use Hplc analysis

Dr Reddys, BioGenomics, Reddy Labs,

9 5857

if you have given a blank water how you analyse by general analytical techniques?

626

what is the analytical procedure for COD and BoD

Dai-Ichi,

1 2225

Why pH lies between 0 to 14 only

PI Industries, Unimark Remedies,

4 5792

In chromatograpbic purity 90% is there, in assay 70% is there. How will you prove remaining 30%.

Dr Reddys,

3 4391


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Un-Answered Questions { Analytical Chemistry }

What is diffrence between extractable volume and deliverable volume? Answer pls

494


how can give the expiry period and restadardisation of volumetric solution

1208


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2448


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.

1521


using gradient pressure in gas chromatography are not ?using gradient pressure why

2047






how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1048


what is definition of validation? which components are followed give detail?

823


iam usig ph buffers merk. manually how to prepare ?

910


Qc interview questions

238


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

968


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

927


what is the principle involved in turbidometry and nephelometry ?

2159




962


What is aggregate and fragments in SEC?

548


in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

837