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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How can we detect a compound in hplc which does not have any chromofore?

217

What is similarity factor?

225

What is the difference between the working standard and reference standard?

1 471

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

223

CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

248

How to do spike of aflatoxin in peanut to get maximum recovery

188

How to fix the sample conc. in Related substances test by HPLC?

176

What is the limit for single maximum impurity limit as per USP??

241

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

184

UV and PDA detector, which have less signal to noise ratio?

187

Difference between the quantitative analysis and qualitative analysis?

155

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

121

What is a difference between potency and purity?

73


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Un-Answered Questions { Analytical Chemistry }

in dissolution why pool sample needed? in which type of drug pool sample need?

2185


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

1614


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

1176


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

1632


What is the Formula for coreletion coefficient in plhplc calibration

649






What is third generation HPLC Columns?

1108


WHY pKa value is more important than pH value of the mobile phase in HPLC?

736


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

689


about method developement in hplc

818


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

184


what is the principle involved in turbidometry and nephelometry ?

3123


Tell me about analytical method validation in QC

3466


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

1451


why we should take dst factor for below 1%moisture samples

1752


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?

1854