Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

Dishman,

1 2760

why we use polystyrene film for ftir calibration?

Rakshit Drugs,

4 19120

WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

GVK,

2539

why do we adjusted ph in the mobilphase

Cipla, Dr Reddys, Reddy Labs,

9 25083

How to develop the method when we have very low amount of impurity?

2 8251

If we have 120 minutes run time method for HPLC and you wan to decrease the Run time so what should you do??

6 13697

Wath is the differenc between two column HPLC wich have the samme support , lenth , pore size, etc.. But different name .for exemple : Spherisorb / lichrosorb

NDA,

2 7987

WHAT IS PVT TEST IN DISSOLUTION TEST , WHAT IS PVT SIGNIFICANCE AND HOW IT IS PERFORMED ?

1 7487

2284

How you will select column for HPLC development depends on nature of compound and how it will work explain in brief?

3 10893

What is the role of SO2,I2, Methanolic hydroxide and any base in Karlficher titration

Medley Pharmaceuticals,

2 9201

The boiling point of 1,3 butadiene is -4.4 DC & the boiling point of Pentane is 36.1 DC. Then how come Pentane elute before 1,3 BD in GC analysis?

1 5385

What is Arsenic Test?

Flamingo Pharmaceuticals,

2455

What is the difference between Optical rotation and Spcefic optical rotation

IPCA, Matrix,

2 13428

why we use sodium salicylate in uv light calibration at TLC chamber

Aurobindo, Lee Pharma,

1 8966

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Un-Answered Questions { Analytical Chemistry }

what is mean by peak intigrity?

892

Basic principle of ESI?

2111

if identification threshold crosses the limits then what next step?

827

Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

676

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

1696

Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

1439

what are the guidelines for analytical method validations?

1072

mode of absorption in alimentary canal?

2353

what is the principle involved in turbidometry and nephelometry ?

4134

which are the diffrent batches in the pharmaceuticals?

790

For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

2283

how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

2549

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1739

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

2259

in which situation ion pair require to use?

773

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