Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between kf  and LOD

Enaltec Labs,

5 16902

What is chiral and why this performing in HPLC

Hetero, Macleods,

4 15919

How to Calibrate NMR instrument ?

Reddy Labs,

1 3381




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

Reddy Labs,

1 9819

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 2357

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

Aurobindo,

4 17314

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 4216

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

Reliance,

2221




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 21047

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

Laurus, Teva API,

10 53911

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

Orchid,

1 4060

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,

1429

can i use hplc detector to uplc and why?

Mylan, SGS,

1075

what is the maximum flow rate in prep hplc

Meril Life Science,

1 1640

how will you do the prep for unstable componds?

Piramal Healthcare, CTX Life Sciences, AMRI,

755


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Un-Answered Questions { Analytical Chemistry }

What is viod volume and peak purity in HPLC?

1530


What is the main difference between ODS1 and ODS2 Hplc column.

2368


what is peak purity and its formula

344


why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1450


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

1359






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.

1306


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

1043


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1231




1154


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

756


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1322


How would you decide dissolution medium for NCE compound of class I drug

842


Why Ethanol is Used for Standardization of GC Head space?

2738


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1274


what is the disso medium for tropsiun chloride

1025