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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

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

59 165304

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

Cipla, Orchid, Ratiopharm,

4 22493

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

4 14942

What is principle of Polarimeter?

Intas,

21 71124

What is unit of KF?

ZCL,

7 37151

what is principle of XRD?

Cipla,

3 23675

What is unit of pH?

26 40889

How to calibrate glassware against std calibrated glassware?

Cadila, Hetero,

3 10949

One pH means how much volts and milivolts?

Dr Reddys,

7 26760

Why sodium lamp is used as source of Polarimeter?

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

12 49138

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

Cadila,

6 10596

What is normality

Cadila,

12 18521

what is principal of karl ficher instrument!

Alkem Labs, USV,

12 32217

How many clauses in ISO!

2 10129

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

Cipla, LGC Promochem,

5 21479


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Un-Answered Questions { Analytical Chemistry }

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

6152


acceptance criteria for lod & loq by standard deviation of response and slope??

1605


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

2527


Why a1% value is used for some product ? What is the criteria for selection a1% value ?

1411


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1533






cefoperozone and sulbactam inj. hplc test method

1634


what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

1654


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

1215


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

1482


WHY given much noise PDA dector then VWD Dector

1084


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

1039


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1394


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

1736


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1107


why holium oxide prepared in 10% HCLO4 SOLUTION

543