Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between kf  and LOD

Enaltec Labs,

5 16283

What is chiral and why this performing in HPLC

Hetero, Macleods,

4 15617

How to Calibrate NMR instrument ?

Reddy Labs,

1 3229




what is difference b/w spectroscopy, Spectrometry and Spectrophotometry ?

Reddy Labs,

1 9653

Hello Dear all; I have a technical question related to analytical Chemistry, I have a sample of (40% w/w) Ferric Chloride solution (for water treatment purposes which consist a little portions of Ferrous Chloride and Hydrochloric acid. I need to know the methods to determine the percentages of each Ferrous Chloride and Chloride acid. Also I want to make sure that this solution is truly (40% w/w). So ANY CLUE !!! Thanks in advance.

2 2196

What is the meaning of 624 in DB-624 Capillary column used in GC?

Aurobindo,

4 16090

In Agilent HPLC calibration using Empower 3 Software, What is the criteria for GPV Baseline starting point? i.e., Either it can start from -0.00/+0.00 or any range is there like -0.05 to +0.05 or ......etc?

Apotex,

1 3940

using gradient pressure in gas chromatography are not ?using gradient pressure why

Reliance,

2148




What is the difference between STANDARDIZATION and CALIBRATION of instrument like KF? why do we standardization of KF everyday? Why the KF factor being only 5.02 etc? 

AlpaMed, Vergo pharma research,

5 20043

What is Formula of Potency calculation on Dried basis, As is basis& Anhydrous basis.

Laurus, Teva API,

10 49904

Why base line not start from zero in GC Chromatography analysis.

Orchid,

1 3780

Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

Apex Encon Projects Private Limited, Cipla,

1354

can i use hplc detector to uplc and why?

Mylan, SGS,

977

what is the maximum flow rate in prep hplc

Meril Life Science,

1 1449

how will you do the prep for unstable componds?

Piramal Healthcare, CTX Life Sciences, AMRI,

689


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Un-Answered Questions { Analytical Chemistry }

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

805


How can we calculate offset value pH measurment

235


what is the structure of DOWEX-50

3740


from where i get mortar pastle for glass bottle crush? it's required for testing of it?

917


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






WHAT IS THE USE OF STARTER ?????????

1120


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

600


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

1011


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

927


all types of questions asked at the cipla interview

3378


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

495


What is control room temperature and which guide line says?

377


Why sodium hydroxide used for maintain pH of phosphate buffer

971


What is the principle of Thermal conductivity detector and FID?

1452


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

6159