Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

927

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

380

Qc interview questions

Apotex,

381




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

2 1342

why are measure gas flow " ml " in Gas chromatography

398

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

2 948

How to start the dissolution development for unknown tab?

IPCA,

327

what is DIPE limit in residual solvent?

1 730




What is control room temperature and which guide line says?

377

What is the pH of water?

Zydus Cadila,

1 1186

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

Zydus Cadila,

1 905

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

299

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.

1 458

What is difference between chemical Assay and Hplc assay?

Lee Pharma,

1 1226

Near infrared Principle

1 605


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Un-Answered Questions { Analytical Chemistry }

what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1086


What is method validation in quality control

2431


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

240


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

705


Why potassium dichromate is used in calibration of uv?

337






function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1228


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

692


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

1265


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

3655


why we are using hexane in calibration of number of drop per mL

259


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

333


why are measure gas flow " ml " in Gas chromatography

398


What is third generation HPLC Columns?

732


Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

298


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

874