Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

which effect is mainly responsible for chromatographic separation when silica is the statinary phase at TLC? thanks in advance

1 1517

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

633

why in GC calibration of linearity regression coefficient should not be less than 0.999

Jubilant, Acacia,

1 3105




why don't we call POH meter? As we all as PH meter

Aurobindo,

4 4365

Why we are having specification 100% above in case of assay as there is only 100% of compound?

MSN Pharma, Nectar Lifesciences,

2 2930

why we are taking 89ml concentrated HCL for preparing 1N HCL

3 5169

Calculate the water content in Di Sodium Tartrate (DST) based on molecular weight?

2 2717

What are the terms used during Melting Range Analysis ?

2 1740




As per USP u/vacuum means (how much vacuum should be applied)?

Mylan,

1 2849

what is difference between zero air gas and o2 gas

IPCA, Vasudha Pharma,

1 5725

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

898

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

Hetero,

888

In which cases factor of KF Reaget got higher side

2 3492

what is the concept for adjustment of pH in HPLC buffer solution ? a. Common ion effect b. Counter ion effect and explain me, how we adapt this principles & what is the role of these principles in our method

Apex, Pentagon Labs,

1033

What is the difference between BD

704


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Un-Answered Questions { Analytical Chemistry }

what is definition of validation? which components are followed give detail?

843


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?

1200


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1375


How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1185


what is the origin to prepare standard operating procedure

914






WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1100


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

888


how to calibrate hplc & gc

3056


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

723


in gas chromatography what is the difference between gas flow rate and average linear velocity ?

948


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

5798


What is the difference between spectro meter and spectro photo meter?

8287


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

1268


why we use sodium salicylate in uv light calibration at TLC chamber

4760


what type of question will ask in the interview of lab chemist.

2042