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 10838

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 10968

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

Orchid, Gangwal Chemicals,

11 42204




What is the composition of K.F

IPQA,

6 33259

What should be the precision for HPLC during technology transfer?

3 6228

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

BMS, Indoco Remedies, Sun Pharma, Cipla,

3 40608

Wt s the use of linearity in HPLC method validation

4 11156

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

Hetero, Mylan,

1 5315




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

1 3606

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

Medreich, Jubilant, Mylan,

3 19168

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

3 21734

why the sucrose used in calibration of polarimeter

Neuland,

5 10977

what r the parts calibrated in gc

Reddy Labs, ELBS,

21 21110

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

3 18480

is there any material other than caffene to calibrate hplc detector

Biocon,

12 17258


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Un-Answered Questions { Analytical Chemistry }

What is aggregate and fragments in SEC?

580


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

1921


using gradient pressure in gas chromatography are not ?using gradient pressure why

2076


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]

1442


What is the difference between known and unknown impurities?

188






what is the structure of DOWEX-50

3565


What is the difference between BD

701


WHY given much noise PDA dector then VWD Dector

609


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

673


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

980


what is weight veriation in pharma industry ? plz explain me

985


iam usig ph buffers merk. manually how to prepare ?

934


mahagenco syllabus for the post of chemist

4850


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1612


Why potassium dichromate was using in Uv calibration?

183