Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why reference flow required during hplc analysis on rid?

1 3698

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

1 6848

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

2 15936

What is viod volume and peak purity in HPLC?


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

3 7106

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.


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 2387

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


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


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

3 15199

What is the purpose of octyl silane columns?


how many types of Proceing methods?

Reddy Labs,

7 7270

What is the column performance and column efficiency?

Reddy Labs,

2 11703

What are the primary standards?

6 8599

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 2788

Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.


what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.



why we are using benzene, anyline in acetic anhdride assay titration method?


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


How to choose the which salt is suitable for mobilephase


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion


what is the principle involved in turbidometry and nephelometry ?


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?


mode of absorption in alimentary canal?


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


How can the GC or HPLC method is selected to determine the impurity profile in drug product?


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?


In Dissolution Test why limit is define Q+5% what is the role of +5%.


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