Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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


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 4744

How to caluculate the RRF and correction factor in hplc

Aurobindo, Alkem Labs, Rakshit Drugs, SDLPL,

1 6068

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 2228

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

Dr Reddys, Piramal Enterprises,

1 2830

How much carbon loading in nomalphase columns?

5 2539

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 2307

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 3225

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


1 2074

What is the use of ELSD in HPLC?


3 2497

What is difference between FID and TCD in gas chromatography

VPCPL, Cipla,

1 4367

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


1 3501

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Un-Answered Questions { Analytical Chemistry }

what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?


iam usig ph buffers merk. manually how to prepare ?


What is column in chromatography?


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?


What is the difference between known and unknown impurities?


WHY given much noise PDA dector then VWD Dector


what is the disso medium for tropsiun chloride


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio


What is the pilot-plant in pharma sector.


What is the difference between spectro meter and spectro photo meter?


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me


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


How would you decide dissolution medium for NCE compound of class I drug