Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Why we use caffeine for HPLC calibration in Detector wave ength accuracy test

Reddy Labs, Aurobindo, Cipla, Arvind, Shasun Chemicals,

59 143344

Why we use holmium oxide,perchloric acid for uv/vis calibration

Cipla, Ratiopharm, Orchid,

4 19980

Why Deuterium lamp is used as UV light Source for UV.

4 12938




What is principle of Polarimeter?

Intas,

21 63733

What is unit of KF?

ZCL,

7 32514

what is principle of XRD?

Cipla,

3 21631

What is unit of pH?

26 34770

How to calibrate glassware against std calibrated glassware?

Cadila, Hetero,

3 9576




One pH means how much volts and milivolts?

Dr Reddys,

7 22314

Why sodium lamp is used as source of Polarimeter?

NCL, Zydus Cadila, College School Exams Tests, Hetero,

12 43715

why there is a need of optical activity & specific optical activity measurement by polarimeter

Cadila,

6 8815

What is normality

Cadila,

12 16114

what is principal of karl ficher instrument!

Alkem Labs, USV,

12 27961

How many clauses in ISO!

1 9053

Why 10%,20%,30% Sucrose solution is used for the calibration of polarimeter?

Cipla, LGC Promochem,

5 19220


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Un-Answered Questions { Analytical Chemistry }

can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

913


how the compound separate in coulunm,explain

1024


Qc interview questions

345


What are the primary considerations in extractables and Leachables ?

1010


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2492






in gas chromatography what is the difference between gas flow rate and average linear velocity ?

1010


what is peak purity and its formula

198


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

6828


why we are using benzene, anyline in acetic anhdride assay titration method?

821


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

265


How to determine water content of bis tetrazole amine mono ammonium salt

1936


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5423


how can give the expiry period and restadardisation of volumetric solution

1295


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1419


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

300