Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between kf  and LOD

Enaltec Labs,

5 18067

What is chiral and why this performing in HPLC

Hetero, Macleods,

4 16667

How to Calibrate NMR instrument ?

Reddy Labs,

1 3674

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

Reddy Labs,

1 10175

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 2675

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

Aurobindo,

4 19543

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 4636

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

Reliance,

2362

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 22852

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

Laurus, Teva API,

10 61926

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

Orchid,

1 4435

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,

1564

can i use hplc detector to uplc and why?

Mylan, SGS,

1255

what is the maximum flow rate in prep hplc

Meril Life Science,

1 2029

how will you do the prep for unstable componds?

Piramal Healthcare, CTX Life Sciences, AMRI,

895


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Un-Answered Questions { Analytical Chemistry }

What is the difference between purge septum flow and column flow in gas chromatography?

1046


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

888


Difference between the quantitative analysis and qualitative analysis?

10


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

1191


What is the purpose of octyl silane columns?

3131








1290


why equlirium conatant of water have 14 value

1165


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

7512


Explain what is a base line?

118


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

7065


why we are using benzene, anyline in acetic anhdride assay titration method?

1063


What is third generation HPLC Columns?

983


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

479


Principle of single pan analytical balance

3995


Why we use potassium dichromate in uv calibration Exact reason behind it??

27