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 1417

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

Aurobindo, Neuland, DRL,

4 6738

What id the resolution factor

1 2238

what is a placebo peak

Optimus, GMP Pharma,

2 2994

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

1 1029

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

Super Pharmaceuticals,

2 2242

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

Finar Chemicals,

1 3107

India is. Under which zone as per QF1.?

Aurobindo, Gland Pharma, Acebright,

4 8535

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


1 4252

why salicylic acid not use for dissolution.

Cipla, Indo Baijin Chemicals,

1 3050

Which water can use Hplc analysis

Dr Reddys, Reddy Labs, BioGenomics,

9 6479

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


what is the analytical procedure for COD and BoD


1 2566

Why pH lies between 0 to 14 only

PI Industries, Unimark Remedies,

4 6687

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

Dr Reddys,

3 4882

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Un-Answered Questions { Analytical Chemistry }

Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?


Why perchloric acid used for potentiometric titration


How will u perform degradation study in detectors other thann PDA in HPLC Methodology


In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.


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


in dissolution why pool sample needed? in which type of drug pool sample need?


How much is the standard area for glc analysis


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?


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


how to get accurate result for Residue on evaporation in purified water


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


Why potassium dichromate is used in calibration of uv?


can i use hplc detector to uplc and why?


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth