Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how does h2so4 prevent oxidation of mohr salt before it is titrated?

1 796

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


in HPLC injection volume is increase ,R.T will increase ?

Claris Lifesciences,

5 5002

How to caluculate the RRF and correction factor in hplc

Aurobindo, Alkem Labs, Rakshit Drugs, SDLPL,

1 6609

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 2335

what is the most common FT-IR source used for the MID&Near IR regions?

Dr Reddys, Piramal Enterprises,

1 2957

How much carbon loading in nomalphase columns?

5 2733

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 2431

what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.



Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?


Why we use methanol as solvent in kf standardisation. Why not other solvent?

Caplin Point, Epione Labs, Hetero,

1 3430

if relative response factor is 1.07, to select how much value


1 2190

What is the use of ELSD in HPLC?


3 2678

What is difference between FID and TCD in gas chromatography

VPCPL, Cipla,

1 4785

What is the difference between high pressure gradient and low pressure gradient in hplc?


1 3721

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Un-Answered Questions { Analytical Chemistry }

what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.


How to do regeneration of Metacarb Pb plus column?


What is the difference between known and unknown impurities?


How to determine water content of bis tetrazole amine mono ammonium salt


about method developement in hplc


can i use hplc detector to uplc and why?


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc


Why dissolution test is not performed in all of the products


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )


acceptance criteria for lod & loq by standard deviation of response and slope??


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?


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


mahagenco syllabus for the post of chemist