Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

when we use pda detector in hplc instead of uv detector

Hetero,

6 17059

why we use holmiumperchlorate in calibrating uv

DRL, Aurobindo, MSN Pharma,

4 12947

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

GVK,

4 9393




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

Cadila, Ranbaxy, Laurus,

6 17352

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

Alembic,

1 1221

what is difference of uv and pda

MSN Pharma, Akums, Shilpa Medicare, MSN,

13 54638

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

1 4843

What is calibration procedure of gredient HPLC pump

4 20165




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

1 5525

what is dissolution

DRL,

6 18253

What is colimn selection Criteria in HPLC analysis?

4 11045

How to select buffer for HPLC mobile phase

Lupin, Cipla, Cadila,

4 17278

What is primary & Secondary Standard ? Give Example

Lupin, Cipla,

17 144170

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

3 7907

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

3 5588


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Un-Answered Questions { Analytical Chemistry }

What is Band broading effect explain

562


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

957


why disodium tartarate used in karl-fischer instrument ?.

717


Explain the relations between number of carbon atoms in alkanes and retention time ?

626


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

324






What is the calibration of uv process and preparation

697


What is the purpose of octyl silane columns?

2642


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

2110


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

6060


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

1068


sop of a uv visible spectrophotometer double beam elico model

4156


How we can determine water content in piperazine

891


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

239


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

897


What is AV value in test uniformity content ,describe calculation

170