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.

726

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.

Atul,

701

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?

1009

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

Natco,

1 2190

What is the use of ELSD in HPLC?

Anthem,

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?

Cipla,

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?

2297


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.

1022


How to do regeneration of Metacarb Pb plus column?

1261


What is the difference between known and unknown impurities?

264


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

1936






about method developement in hplc

387


can i use hplc detector to uplc and why?

943


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

935


Why dissolution test is not performed in all of the products

1187


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

1991


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

1184


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

1925


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?

913


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

625


mahagenco syllabus for the post of chemist

4904