Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In burette calibration of Karl fischer Instrument, the multiplication factor 1.00693 is using for how much ml of water dispenced. why

1 1720

how can we decide the limit of cleaning validation? What is the criteria for it?

Glenmark,

2 9334

What is difference between Related Substance & Impurity Profile?

Jubilant Organosys,

2 40467




Why we are injecting low load standard conc. while analysing Related Substances by HPLC?

3 6934

why wetlab is called as wetlab

6 11236

In UV-VIS spectrophotometer:My diluent is methanol even though i corrected base line for methanol,In my sample scan i found methanol peak.what is the reason?

2 6864

What is the diffrence between the performing of LOD ordinary drying at voven and vaccum method.

Apex,

4 6293

How can we calibrate the burette dispencing capacity in metrorm kf titration calibration

1 4147




how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1041

in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases

Aurobindo, Cadila, Martin,

4 18334

loss on drying we applied vaccum for some compounds and some compounds are at 105c why

3 7934

why we are calibrating autopolarimeter with quartz control plates

1 3679

what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

Siemens, GHI,

6768

why we use TLC?

8 14093

why disodium tartarate is used for autotitrator calibration

Cipla, Micro Labs,

2 9076


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Un-Answered Questions { Analytical Chemistry }

How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1040


what is third integration

660


what is procedure of actual procedure for registration of drug?

572


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1319


Dear sir, This is R.Kadambavadani working in a pharma industry. while doing RS analysis of ibuprofen API, unknown peak eluting some times in the 0.6 Min RT. Kindly send me what is the exact reason behind that. also am using ACN the mobile phase.

238






Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1236


What is FFA, PV, and PAV value in oil.

502


How to do regeneration of Metacarb Pb plus column?

1216


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

241


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

434


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

889


pharma industries oriented

787


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

930


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

815


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2497