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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is dwell volume in HPLC?

Aurobindo, Cadila, Strides, SUN, Sun Pharma,

2 7835

what does pH stand for?

Orchid,

4 8383

Definition of beers_ lamberts law

Aarti Industries, Agio Pharmaceuticals, Emcure, Supriya Lifescience,

4 8234

Why monograph of hplc coming upperside of drift but in IR monograph coming in drift side?

1 4124

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

Zim Laboratories,

2311

Why the ph limit (1_14) Is used?

Cipla,

3 8280

What is cut off value of solvent used in hplc

Pfizer,

1 6528

How to calculate mass balance in RS after degradation

Reddy Labs,

1 6024

if out of two set of results of moisture analysis first 1 is passing, second one is failing, is it oos ? or vice a versa first 1 is failing and second one is passing. for information mean value to be reported and in mean value the substance is ppassing, is it oos or normaal mean value to be considered?

JBCPL,

1 3644

Can we interpret accuracy from linearity in method validation?

Dr Reddys, Lupin,

1 2984

What is aggregate and fragments in SEC?

2077

how pyridine can be analysed other than GC?

1 4241

What is the calibration of uv process and preparation

Aurobindo,

1966

How to prepare 1000ppm methylene blue solution

2 21193

Identify problem faced when mass spectroscopy is used with HPLC system ?

College School Exams Tests,

1826


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

calibrtion procedue of LC-MS

2685


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3840


Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .

883


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

2558


if instrument calibration fails then what require to do?

928


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

3450


Difference between hlaf and rlaf

2077


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6019


how you establish the LOQ?

744


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

2140


how to qualify the impurity?

808


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

7539


How do we fix the sample concentaryion in hplc method development?

1114


if identification threshold crosses the limits then what next step?

827


how to select short coloum and long coloumn for new molecule

2390