Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Difference between uv detector nd RI DETECTOR? wt s the difference between OVI Solvents nd residual solvents incase of GAS CHROMATOGRAPHY? nd wt s its detection limit?

3 11101

on what basis SOP's can be changed? IF mobile phase ratio is 70:30 to how much % can we change the ratio in HPLC process

Cipla, Ranbaxy,

7 11217

Why caffeine as a reference standard used for calibration of HPLC?

Orchid, Gangwal Chemicals,

11 42986




What is the composition of K.F

IPQA,

6 34012

What should be the precision for HPLC during technology transfer?

3 6352

how do start hplc method development? how much sample required for developing the method development?

BMS, Indoco Remedies, Sun Pharma, Cipla,

3 41405

Wt s the use of linearity in HPLC method validation

4 11435

which pharmacopeoia mentions that caffiene is used as a standard for HPLC calibration? which other standardscan be used for the same?

Hetero, Mylan,

1 5538




Why will a solution of aspirin without acid or basic hydrolysis give yellow colour with a solution of Ferric chloride?

1 3667

Why do we use 0.005M h2so4 solution for preparation of k2cr2o7 solution for UV calibration?

Medreich, Jubilant, Mylan,

3 19563

In HPLC what is Single point threshold, peak purity index and minimum peak purity index? what should be consider for pure peak.

3 22219

why the sucrose used in calibration of polarimeter

Neuland,

5 11228

what r the parts calibrated in gc

Reddy Labs, ELBS,

21 21736

acceptance criteria for ph meter, hplc detector,pump,injector,oven when we calibrate.

3 18880

is there any material other than caffene to calibrate hplc detector

Biocon,

12 17669


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Un-Answered Questions { Analytical Chemistry }

why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6829


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

1061


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

1836


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

301


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2195






How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

352


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1925


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

467


how to calibrate hplc & gc

3105


How much is the standard area for glc analysis

934


How to do regeneration of Metacarb Pb plus column?

1263


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

698


How we can determine water content in piperazine

891


Why to use propyl paraben in HPLC gradient calibration

560


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1325