Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How you collect dissolution media while in stirring condition of a basket or a paddle?

Mylan,

2 5309

At what distance the sample is collected in dissolution basket?

3 7996

why we use prednisone tablet in chemical callibration of dissolution apparatus?

Cipla, Mylan, Umedica Laboratories,

6 34956

Why Ethanol is Used for Standardization of GC Head space?

Anuh Pharma, Cipla, Finar Chemicals, Hetero, Sun Pharma,

3722

How much area of methanol or other solvent are acceptable in blank (Diluent) of Gas chromatography.

2 8028

As per OOT for any product what is calculation and how to invetigate the OOT

Aurobindo, Hetero,

3 14933

What is Spliit and Splitless in Gas Chromatography nad How does it work?

Sterling,

4 10760

Why used 0.02% v/v solution of toluene in hexane for calibration of UV.

3 12855

Why 1.2% KCl is used for limit of stray light? and why limit of stray light is required in UV calibration?

Lupin, Ranbaxy,

5 50132

How to decided test concentration in GC analysis.

3 6825

What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

2118

in calibration of disintegration test apparatus why cycle limit is 28-32?

Caplin Point,

2 12042

Why pH range is maximum 14.0

UPL,

6 27234

what is the structure of DOWEX-50

4926

What is the difference between Normal phase method & Reverse method in HPLC ? Define application of both method.

4 19608


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Un-Answered Questions { Analytical Chemistry }

Why dissolution test is not performed in all of the products

2038


in stress study if your api not soluble in hcl naoh h2o2 then what require to do?

332


If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

360


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

2160


why we use a particular hplc column for a particular compound give reasons?please

2269






What is the use of tlc and hplc? And when and where use?

663


how require to set assay concentration for standard and sample?

369


process of Diclofenac sodium,IP.

1675


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

2607


how to select short coloum and long coloumn for new molecule

1820


what is mean by extactable and leachable study?

571


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

1156


What is dose dumping? why require to do?

302


Difference between the quantitative analysis and qualitative analysis?

628


why octanol used to determine the partition coefficient ?

1920