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 1208

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

NA,

508

Why we perform the ir analysis?

Sequent,

2 1095




difference between calibration and validation

Mylan,

2 1885

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

923

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

1 857

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

Dr Reddys,

1 868

why disodium tartarate used in karl-fischer instrument ?.

Dishman,

671




why does used dry caffien in HPLC calibration?

Dishman,

555

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

1 1366

What is gelatinization?

Nestle,

353

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

Nestle,

525

Why we check moisture,ash & AIA in product

437

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?

357

about method developement in hplc

364


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Un-Answered Questions { Analytical Chemistry }

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

1298


how the compound separate in coulunm,explain

986


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.

1571


pharma industries oriented

814


How to do regeneration of Metacarb Pb plus column?

1237






What is third generation HPLC Columns?

666


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

848


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

1809


Why we check moisture,ash & AIA in product

437


cefoperozone and sulbactam inj. hplc test method

1240


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

812


what type of questions asked on analytical balance and also give answers................all pharma companies?

5843


What is AV value in test uniformity content ,describe calculation

19


what is turbidimetric titration?Give 2 examples.

1025


What is the calibration of uv process and preparation

648