Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what are peak purity,peak purity index,peak thresold

2 11937

1)why use benzophenon,uracil in hplc calibration. 2)why use sucrose in polarimeter calibration. 3)what is S/N ratio, noise and drift in hplc 4)how we can find lod and loq in method validation

1 10781

What is (Q) point dissolution?

Cipla, Macleods,

6 18735




Why we are using K2Cr2O7 for control of absorbance in UV?

2 10046

1 why polyesterene film used for ftir calibration ? 2 why k2cr2o7 is used for control of abs in uv ? 3 why holmium oxide used for control of wavelength in uv

3 9261

what is the principal of malvern particle sizer & its used in pharma industry

3 5732

what is the difference between system precision and method precision?

Teva Pharmaceuticals,

3 21555

In lcms analysis some times we get sodium and potassium adducts. if the compound is havine sodium ions how can we confirm wether sodium is from sample or it is a adduct?

Teva Pharmaceuticals,

2 4898




what is difference between moisture contents and water contents ?

Cipla, Hetero, USM,

12 44811

In GC, What does 'Column condensation test' mean by?

Reddy Labs,

2 7842

same sample on two preapration gives differnt result during hplc analysis

3 4979

what is titrent,& titrate

Graviti Pharmaceuticals,

2 9479

Why we are using a Kf Factor range 4 to 6

7 34780

What is difference between Chromatographic purity and Related substances analysis?

3 17659

Why we are using the methanol in Kf titration?

Reddy Labs,

6 15263


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Un-Answered Questions { Analytical Chemistry }

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

3713


Difference between hlaf and rlaf

747


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1154


Colorimtry

276


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

764






how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1178


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

1467


Principle of single pan analytical balance

3748


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1431


Explain the relations between number of carbon atoms in alkanes and retention time ?

713


Why irmoisture balance is used for corrugated box moisture testing

1131


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

894


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.

756


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1217


WHAT IS THE USE OF STARTER ?????????

1138