Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why reference flow required during hplc analysis on rid?

1 3593

why hydrogen and zero air used for flame ignition in gc?

1 6683

How we get DST moisture 15.4-16.0%. what is the calculation or method behind it.

2 15302




What is viod volume and peak purity in HPLC?

1348

what is the results if we use ODScolumn instead of BDS column ,(ther parameter is same for column) in assay method ?

3 6990

How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1022

what is the use of tap density apparatus? why we calculate it? what is the difference between the bulk density and tap density?

Alchemist, Alembic, Apex,

1 2272

from where i get mortar pastle for glass bottle crush? it's required for testing of it?

897




what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1061

What is the difference between void volume and delay volume in HPLC?

3 14912

What is the purpose of octyl silane columns?

2641

how many types of Proceing methods?

Reddy Labs,

7 7104

What is the column performance and column efficiency?

Reddy Labs,

2 11484

What are the primary standards?

6 8427

why we want incorporate area of each solution of Intermediate precision and repeatability as well as Accuracy ? What is the use to incorporate area of each solution of Intermediate precision and repeatability as well as Accuracy ?

1 2720


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Un-Answered Questions { Analytical Chemistry }

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

323


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1212


How to check hplc detecter sensitivity?

233


What is stray light in uv what are units for stray light

240


Which is the highly polar and highly non polar column in HPLC?

811






What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

5824


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

310


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1323


Tell me about analytical method validation in QC

1898


What is gelatinization?

387


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

1108


why are measure gas flow " ml " in Gas chromatography

365


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

862


Can we interpret accuracy from linearity in method validation?

753


how will you do the prep for unstable componds?

660