Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHY POTASSIUM DICROMATE USING IN UV CALIBRATION

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

Syngene,

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

Apotex,

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

1709


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

959


Why perchloric acid used for potentiometric titration

27


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.

670


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

1177






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

2542


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

1809


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?

956


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

451


what is difference between zero air gas and o2 gas

5908


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

866


what are the standard methods for HPLC?

1474


Why irmoisture balance is used for corrugated box moisture testing

1016


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]

1456


why disodium tartarate used in karl-fischer instrument ?.

671