Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What are the factors effect peak shape in HPLC ?

College School Exams Tests,

2 2964

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

College School Exams Tests,

743

explain 5 components of gas chromatography ?

Nucon, College School Exams Tests,

738




Describe 5 components of SFC ?

College School Exams Tests,

1 1010

How we can determine water content in piperazine

GVK, Cipla,

977

Difference between hlaf and rlaf

Sharon,

774

What is oot in Stability analysis? (example)

Indoco Remedies,

2 1677

How to choose concentration of LOQ solutions for RS analysis? Example.

Indoco Remedies, Abbott,

862




What is the main difference between ODS1 and ODS2 Hplc column.

Indoco Remedies,

2146

How to select Sample concentration in RS analysis?example.

1 1569

What is Diffidence between Normal Detector and PDA Detector?

Aurobindo,

2 3359

If we have a kc is1*10^8 and the .kp 2*10^5 of reaction A------->B C------->D what is the volume of C?

685

What is linearity in hplc and how to calibration

Aurobindo,

1 2009

Why void volume(time in seconds) 1 in hplc system suitability

1 2671

what is role of pH in mobile phase

Cipla, Dhanuka Laboratories,

3 5366


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Un-Answered Questions { Analytical Chemistry }

how will you do the prep for unstable componds?

727


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1239


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1228


how you determine moist.of NaOH sol or NaOH flacks

1111


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1283






what is partion and column chromatography

1101


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

1985


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

331


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

753


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2163


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

1506


what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

7345


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1095


why we should take dst factor for below 1%moisture samples

1484


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?

6223