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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can you determine a compound acidic or basic?

Cipla, Celon Labs,

2 7260

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

Reddy Labs,

4 6758

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

Reddy Labs,

3 7541



How you start the method development of unknown compound.

 1 3358

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

 1897

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

MSN Pharma,

3 7523

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

Micro Labs,

3 6923

WHY KBr is used in IR Spectroscopy

GVK,

3 9897



How can you prepare 0.05M Ammonium acetate volumetric solution?

 2 12948

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

DRL,

2 9413

IF WE INCREASE FLOW RATE RT DECRESE.WHY

 2 7637

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 8955

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

Posh Chemicals,

2 6886

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

 1167

various methos to calculate precision in validation methods in HPLC?

 2 4786

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Un-Answered Questions { Analytical Chemistry }

What is third generation HPLC Columns?

689

iam usig ph buffers merk. manually how to prepare ?

970

what is procedure of actual procedure for registration of drug?

607

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

1914

What is the purpose of octyl silane columns?

2600




how to select short coloum and long coloumn for new molecule

1008

which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

916

What is method validation in quality control

2382

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

1355

why are measure gas flow " ml " in Gas chromatography

333

How you develop a method in HPLC?

1270

Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

1211

what is the structure of DOWEX-50

3649

pharma industries oriented

825

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2413

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