Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why reference flow required during hplc analysis on rid?

1 3414

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

1 6373

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

2 13897




What is viod volume and peak purity in HPLC?

1253

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

3 6701

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.

927

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 2044

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

829




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

979

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

3 14290

What is the purpose of octyl silane columns?

2422

how many types of Proceing methods?

Reddy Labs,

7 6795

What is the column performance and column efficiency?

Reddy Labs,

2 10959

What are the primary standards?

6 8077

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 2577


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Un-Answered Questions { Analytical Chemistry }

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

1062


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

1840


about method developement in hplc

321


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

6577


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1067






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?

2217


What is control room temperature and which guide line says?

251


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

1890


if you have given a blank water how you analyse by general analytical techniques?

626


Why dissolution test is not performed in all of the products

1098


how to calibrate hplc & gc

3013


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2448


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6547


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

5


wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

990