Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

when we use pda detector in hplc instead of uv detector

Hetero,

6 22871

why we use holmiumperchlorate in calibrating uv

Aurobindo, DRL, MSN Pharma,

4 16656

why chiral compounds will rotate the plane polarized light in SoR.

GVK,

4 13323

Why sulpuric acid only used to ROI but not used nitric acid and some other acids?

Cadila, Laurus, Ranbaxy,

7 29232

how we do assay of urea, ammonium sulpate, ammonium nitro pospate etc

Alembic,

1 2941

what is difference of uv and pda

Akums, MSN, MSN Pharma, Shilpa Medicare,

13 66553

how can you do the analysis of compound given to u by hplc

2 7638

What is calibration procedure of gredient HPLC pump

4 24163

How to determine water content of thioanisole? which interfere by KF titration?

1 6953

what is dissolution

DRL,

6 25777

What is colimn selection Criteria in HPLC analysis?

4 14289

How to select buffer for HPLC mobile phase

Cadila, Cipla, Lupin,

4 21391

What is primary & Secondary Standard ? Give Example

Cipla, Lupin,

17 161574

Which buffer is used for LC/MS mobile phase & at What Conc.

3 10106

How we fix the validity period of a Normal solution and re-standardization due date

3 7923


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Un-Answered Questions { Analytical Chemistry }

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

8477


in which situation ion pair require to use?

285


how to develop the icp ms method? Application of icp ms?

326


UV and PDA detector, which have less signal to noise ratio?

652


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

2478






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?

2220


how to decide for one product require water content or LOD?

333


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

2725


is it nessesary to do solution stability for 7 days?

324


from where i get mortar pastle for glass bottle crush? it's required for testing of it?

1743


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

2142


What is importance of pH in the Heavy metal test and How it effect on the test results?

1760


Why perchloric acid used for potentiometric titration

2172


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

8934


How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

2875