Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is a differance between assay by HPLC and assay by titration?

5 19580

what is PH of 0.1N Hcl, 0.01N Hcl & Mehanol.

3 39390

what is batch no. of prednisole tablet.

Dr Reddys,

8 9373




HOW RRF IS CALCULATED IN HPLC

2 8653

why should we do limit of stray light in UV calibration and why should use potassium chloride

2 23340

why ph is between 0 to 14

Reliance, Zydus Cadila, Apotex,

6 16472

what is the definition of limit of stray light in UV calibration

Zydus Cadila, FDC,

1 20627

what is the dipolement and how it is related to IR

Aurobindo, AJ Square Inc,

1 5666




why we are using in ph calibrations ph4,7,9.2 buffers only?

Reddy Labs,

5 13900

why hexane is used for FID calibration in GC

Glochem,

1 2536

what is %labelled amount in content uniformity of dosage unit and its calculation?

Zydus Cadila,

3467

how to prepare 5normality of hcl

2 37824

in pentoperazole capsules usp why assay value is substract from dissolution

Ranbaxy,

1 1835

diference b/w packed &capilary columns

2 5351

how to prepare 5 normality of h2so4 solution

Symbiotec,

3 47403


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Un-Answered Questions { Analytical Chemistry }

what is DIPE limit in residual solvent?

340


What is diffrence between extractable volume and deliverable volume? Answer pls

497


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1241


How would you decide dissolution medium for NCE compound of class I drug

631


What is aggregate and fragments in SEC?

550






Tell me about analytical method validation in QC

1440


How to estimate potassium?

121


Why Ethanol is Used for Standardization of GC Head space?

2536


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

406


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

880


Which std. used for standrdisation of ZnSO4?

953


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

5471


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

1490


what is the identification test of volatile substance? what is volatile compound?

894


Why we check moisture,ash & AIA in product

386