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 1617

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

679

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

Jubilant, Acacia,

1 3258




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

Aurobindo,

4 4578

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

MSN Pharma, Nectar Lifesciences,

2 3107

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

3 5379

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

2 2989

What are the terms used during Melting Range Analysis ?

2 1872




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

Mylan,

1 3006

what is difference between zero air gas and o2 gas

IPCA, Vasudha Pharma,

1 6271

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

991

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

Hetero,

938

In which cases factor of KF Reaget got higher side

2 3643

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,

1111

What is the difference between BD

1 808


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Un-Answered Questions { Analytical Chemistry }

1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

242


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1097


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2453


give clarity of linearity and range in method validation

944


What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1314






What is the purpose of octyl silane columns?

2648


what is the difference between potentiometric titration and karl fischer titration?

1112


What is intact assay method development.....?

1120


what are the standard methods for HPLC?

1498


why octanol used to determine the partition coefficient ?

974


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1927


Can we interpret accuracy from linearity in method validation?

757


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

661


could negative ions be produced by bombardment process in mass spectrometry?

194


what is the structure of DOWEX-50

3691