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?

Glenmark,

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.

Apex,

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.

1158

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,

7345

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?

7070


what is third integration

788


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

625


Why potassium dichromate is used in calibration of uv?

417


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

732






Why dissolution test is not performed in all of the products

1258


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?

1128


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

1305


what is the principle involved in turbidometry and nephelometry ?

2637


give clarity of linearity and range in method validation

1022


Why irmoisture balance is used for corrugated box moisture testing

1151


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

8680


how to select short coloum and long coloumn for new molecule

1099


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?

453


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

1355