Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

What is the difference between kf and LOD

Enaltec Labs,

5 22646

What is chiral and why this performing in HPLC

Hetero, Macleods,

4 20820

How to Calibrate NMR instrument ?

Reddy Labs,

1 5553

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

Reddy Labs,

1 12284

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 4842

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

Aurobindo,

5 28705

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 7179

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

Reliance,

3442

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 30757

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

Laurus, Teva API,

11 86682

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

Orchid,

1 6990

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,

2654

can i use hplc detector to uplc and why?

Mylan, SGS,

2349

what is the maximum flow rate in prep hplc

Meril Life Science,

1 4071

how will you do the prep for unstable componds?

AMRI, CTX Life Sciences, Piramal Healthcare,

2070

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Un-Answered Questions { Analytical Chemistry }

How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1829

calibrtion procedue of LC-MS

2760

WHAT IS THE PARAMETER FOR THE SELECTION OF MOBILE PHASE IN HPLC?

1250

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2395

why require the ph, buffer during hplc mobile phase?

922

How to set specification of assay, fisdolution and related substances?

933

What is related substance by HPLC impurity limits as per USP?

1158

Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

2746

Why six unit used for precision?

1409

How require to perform linearity as per ANVISA? What are the acceptance criteria?

1400

Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

757

in which situation ion pair agent require to use?

801

WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

2186

what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

10067

While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

2901

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