Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

1385

why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

481

Qc interview questions

Apotex,

497




What is difference between" LOD" AND "VACCUME LOD"

2 1695

why are measure gas flow " ml " in Gas chromatography

478

Difference between standard operating procedure and standard test procedures in pharmaceutical industry

2 1245

How to start the dissolution development for unknown tab?

IPCA,

432

what is DIPE limit in residual solvent?

1 929




What is control room temperature and which guide line says?

466

What is the pH of water?

Zydus Cadila,

1 1447

Why we use buffers Acetate for pH 4.5 & phosphate for 6.8 and not vice-versa?

Zydus Cadila,

1 1132

We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

391

Dear sir, This is R.Kadambavadani working in a pharma industry. while doing RS analysis of ibuprofen API, unknown peak eluting some times in the 0.6 Min RT. Kindly send me what is the exact reason behind that. also am using ACN the mobile phase.

1 607

What is difference between chemical Assay and Hplc assay?

Lee Pharma,

1 1513

Near infrared Principle

1 759


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Un-Answered Questions { Analytical Chemistry }

what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

1327


why holium oxide prepared in 10% HCLO4 SOLUTION

228


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1057


if you have given a blank water how you analyse by general analytical techniques?

820


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

682






why does used dry caffien in HPLC calibration?

705


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

2685


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

344


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

3849


A ha tc is actual defination of retention time?

334


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?

449


What is intact assay method development.....?

1241


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?

1189


What are modes of quantification in related substances

1002


what is peak purity and its formula

344