Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can you determine a compound acidic or basic?

Cipla, Celon Labs,

2 7355

For LOD and LOQ determination which method is accurate? (slopemethod or s/n ratio method)

Reddy Labs,

4 6833

how to develop the shorter run time for pharmacopeial methods having 100 min run time?

Reddy Labs,

3 7610




How you start the method development of unknown compound.

1 3417

How to determine water content of bis tetrazole amine mono ammonium salt

1936

Is there any difference in principal of reverse phase and normal phase chromatography? and why? Please update. Thank and regard

MSN Pharma,

3 7578

How to use RF and rrf in Rs calculation( either multiply or divide)?

Micro Labs,

3 7026

WHY KBr is used in IR Spectroscopy

GVK,

3 9966




How can you prepare 0.05M Ammonium acetate volumetric solution?

2 13199

Why using 0.5% acetone in methanol mobile phase for HPLC Gradient performance check.

DRL,

2 9527

IF WE INCREASE FLOW RATE RT DECRESE.WHY

2 7702

in hplc calibration injector linearity pass,it means inj and det is good. why to perform detector linearity is it required, if it is required,what is difference between injector and detector linearity in hplc calibration

Hetero, Dr Reddys,

4 9073

how can you decide API molucule acedic or basic compound by test?

Posh Chemicals,

2 6948

acceptance criteria for lod & loq by standard deviation of response and slope??

1185

various methos to calculate precision in validation methods in HPLC?

2 4836


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Un-Answered Questions { Analytical Chemistry }

What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2492


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

865


What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1313


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

954


What is column in chromatography?

799






What is the calibration of uv process and preparation

697


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1467


In IR spectra, generally a molecule vibrates without apply emr or ir light?

548


what is peak purity and its formula

198


what is third integration

706


Tell me about analytical method validation in QC

1900


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1925


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?

5829


What is control room temperature and which guide line says?

347


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

1322