Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

tell me about aliphatic acid estimation by hplc which columns can we use

Dr Reddys,

1 2750

does water content by KF will calculate only external moisture absorbed or the ligand ? (for ex copper sulphate pentahydrate)

NA,

1469

Why we perform the ir analysis?

Sequent,

3 3731

difference between calibration and validation

Mylan,

2 4152

why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1802

Data was integrated with RRT CONCEPT OR Overlay with SSTchrmatogram concept which is better?

1 2347

what is the difference between qualitative analysis and quantitative analysis and explain them?

Dr Reddys,

1 2653

why disodium tartarate used in karl-fischer instrument ?.

Dishman,

1 2141

why does used dry caffien in HPLC calibration?

Dishman,

1609

Why we don't add Hcl, HNO3, H3PO4 in residue on ignition, why we add H2SO4

1 3230

What is gelatinization?

Nestle,

1209

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

Nestle,

1 3223

Why we check moisture,ash & AIA in product

1434

When recording an IR spectrum in the lab, we take no special precautions to account for the presence of oxygen, nitrogen, or argon in the air. What are the consequences of this?

1 2004

about method developement in hplc

1252


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Un-Answered Questions { Analytical Chemistry }

if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?

407


is it nessesary to do solution stability for 7 days?

352


Difference between hlaf and rlaf

1692


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

2650


what is procedure of actual procedure for registration of drug?

1489






Why sodium hydroxide used for maintain pH of phosphate buffer

1873


how much mass should be there in volumetric flask while in preparation of sample for assay? 

2095


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

2112


calibrtion procedue of LC-MS

2197


can i use hplc detector to uplc and why?

1844


in which situation ion pair agent require to use?

306


What is the main difference between ODS1 and ODS2 Hplc column.

4532


why we are using hexane in calibration of number of drop per mL

1201


why we use a particular hplc column for a particular compound give reasons?please

2305


if tech transfer fails whay require to do?

373