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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between Chromatograhic Purity And Related substances

Cipla,

11 50752

what is the difference between M.C and LOD

Aurobindo, Cipla, Laurus, Matrix, Synthokem Labs,

21 55920

what is the lamp used in SOR?

Aurobindo,

18 23112

What is the difference between Capillary column and Packed column.

Cipla, Hetero, Sun Pharma, Supreme Petrochem,

7 62161

whai is primary standard?

10 15074

what is the value of pH

Reddy Labs,

11 17344

what is method development parameter in HPLC method development

GVK,

6 39946

How to calculate LOD & LOQ in HPLC Validation Method

Dr Reddys, GSK GlaxoSmithKline, Reddy Labs, Reliance, UIS,

14 101353

Why forced Digradition Study is done

6 10083

What is reaction takes place when water content analysis is done

2 8417

How are PDA Detector work in HPLC

Agilent,

7 35569

what is the differnce between GMP and CGMP

Shilpa Medicare,

7 32531

what is a drug?

Aurobindo,

11 14672

What is the purpose of performing dissolution test on routine basis?

3 7610

why in uv we take k value less than 1

2 8511


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Un-Answered Questions { Analytical Chemistry }

Why we check moisture,ash & AIA in product

856


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

1478


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

842


about method developement in hplc

723


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

1704






we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

787


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

664


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1970


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2920


What is diffrence between extractable volume and deliverable volume? Answer pls

2146


what are the standard methods for HPLC?

1787


what is definition of validation? which components are followed give detail?

1229


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1616


Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

625


how the compound separate in coulunm,explain

1385