Analytical Chemistry Interview Questions
Questions Answers Views Company eMail


Apotex, Micro Labs, Rene,

1 11829

What is the Baseline in HPLC.

Teva API,

2 8642

Why dst is used in kf for factor determination less than 1

Reddy Labs, Sun Pharma,

4 11681

why should we calibrate pH meter with 4,9.2 and 7.4 buffers particularly?

Celon Labs,

5 8755

why inject diluted standard solution in related substance analysis by HPLC?

Sun Pharma,

2 10659

What is the Calcultion of S/N Ratio.

2 7613

Principle of HPLC in one sentance


8 11145

Why are using in Hi,zero air, Ni gass are used GC

Aurobindo, ELBS, Vimta Labs,

5 8688

what is the balance drift?

Torrent Pharma,

2 8105

Retention time & Relative Retention time Definition & between difference? How to Calculate response factor(RF) & relative response factor(RRF)?

MSN Pharma, Titan,

3 13578

why are using toluene in uv calibraion in resolution performance

MSN Pharma,

2 7793

why we make titiration of Iron with EDTA ?

Cipla, Sitec Labs,

1 6341

What is difference b/w IR&NIR


1 3469

Why does boiler drum ph maintain from 9.5 to 10.2

1 4520

What is the definition of water content or moisture content,what is the procedure going on w.c amalysis?

Cipla, KIYI,

1 7329

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Un-Answered Questions { Analytical Chemistry }

Tell me about analytical method validation in QC


how can I make the copper get white bye any salt or acit?


Why perchloric acid used for potentiometric titration


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.


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?


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?


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 is difference between zero air gas and o2 gas


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


what are the standard methods for HPLC?


Why irmoisture balance is used for corrugated box moisture testing


In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]


why disodium tartarate used in karl-fischer instrument ?.