Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In burette calibration of Karl fischer Instrument, the multiplication factor 1.00693 is using for how much ml of water dispenced. why

1 1939

how can we decide the limit of cleaning validation? What is the criteria for it?


2 9983

What is difference between Related Substance & Impurity Profile?

Jubilant Organosys,

2 42827

Why we are injecting low load standard conc. while analysing Related Substances by HPLC?

3 7253

why wetlab is called as wetlab

6 11966

In UV-VIS spectrophotometer:My diluent is methanol even though i corrected base line for methanol,In my sample scan i found methanol peak.what is the reason?

2 7192

What is the diffrence between the performing of LOD ordinary drying at voven and vaccum method.


4 6656

How can we calibrate the burette dispencing capacity in metrorm kf titration calibration

1 4394

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


in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases

Aurobindo, Cadila, Martin,

4 19935

loss on drying we applied vaccum for some compounds and some compounds are at 105c why

3 8515

why we are calibrating autopolarimeter with quartz control plates

1 3911

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

Siemens, GHI,


why we use TLC?

8 14890

why disodium tartarate is used for autotitrator calibration

Cipla, Micro Labs,

2 9717

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Un-Answered Questions { Analytical Chemistry }

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


what is third integration


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


Why potassium dichromate is used in calibration of uv?


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18


Why dissolution test is not performed in all of the products


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?


Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?


what is the principle involved in turbidometry and nephelometry ?


give clarity of linearity and range in method validation


Why irmoisture balance is used for corrugated box moisture testing


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


how to select short coloum and long coloumn for new molecule


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations