Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why reference flow required during hplc analysis on rid?

1 3482

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

1 6497

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

2 14393




What is viod volume and peak purity in HPLC?

1286

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

3 6804

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.

963

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 2141

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

853




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

1018

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

3 14548

What is the purpose of octyl silane columns?

2503

how many types of Proceing methods?

Reddy Labs,

7 6897

What is the column performance and column efficiency?

Reddy Labs,

2 11157

What are the primary standards?

6 8202

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 2622


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Un-Answered Questions { Analytical Chemistry }

In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1442


In IR spectra, generally a molecule vibrates without apply emr or ir light?

507


give clarity of linearity and range in method validation

888


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

1343


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

239






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?

2271


How can I develope method of dissolution by HPLC OR UV

922


acceptance criteria for lod & loq by standard deviation of response and slope??

1131


Difference between hlaf and rlaf

637


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

853


how can give the expiry period and restadardisation of volumetric solution

1246


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

5795


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

812


iam usig ph buffers merk. manually how to prepare ?

934


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

742