Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution ( almost look like doublet). how can i get max resolution ? Is changing gradient method is usefull?

3 8581

what is the need of calulation of RRF of impurity in HPLC analysis?

9 21915

why SGF media used for dissolution . What is the use of it .can we use other media of lower pH instead ot this?

1 6174

what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

Graviti Pharmaceuticals,


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.

Hetero, Reddy Labs,


only one end point is possible for citric acid and we get 2 end points for di acid why?

Reddy Labs,

3 5422

why kf factor coming 0.5

Alkem Labs,

5 11993

For Recent draft guidelines for Dissolution test apparatus calibration, why removing the salicylate tables?

Alkem Labs,

3 6644

How can v calibrate ftir ? Plz explain me


2 14735

what is the diff betwen calibration and system suitability?

8 13664

Why Methanol used in KF Titration?

Glenmark, Lupin,

15 49570

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?


2 5909

why chiral separation?

1 6056

what is main use of primary standards in caliration

Lupin, Nectar Lifesciences, Lee Pharma,

2 3176

what are the important specifications for a Column ?

2 7188

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Un-Answered Questions { Analytical Chemistry }

How you develop a method in HPLC?


Can we interpret accuracy from linearity in method validation?


how will you do the prep for unstable componds?


What is diffrence between extractable volume and deliverable volume? Answer pls


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?


what are the standard methods for HPLC?


What is the difference between spectro meter and spectro photo meter?


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?


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


how to calibrate hplc & gc


Basic principle of ESI?


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


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


What is intact assay method development.....?


what is %labelled amount in content uniformity of dosage unit and its calculation?