Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what are peak purity,peak purity index,peak thresold

2 11571

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 10450

What is (Q) point dissolution?

Cipla, Macleods,

6 18151




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

2 9759

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 9047

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

3 5520

what is the difference between system precision and method precision?

Teva Pharmaceuticals,

3 20717

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 4694




what is difference between moisture contents and water contents ?

Cipla, Hetero, USM,

12 43842

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

Reddy Labs,

2 7691

same sample on two preapration gives differnt result during hplc analysis

3 4800

what is titrent,& titrate

Graviti Pharmaceuticals,

2 9121

Why we are using a Kf Factor range 4 to 6

7 32928

What is difference between Chromatographic purity and Related substances analysis?

3 17045

Why we are using the methanol in Kf titration?

Reddy Labs,

6 14775


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Un-Answered Questions { Analytical Chemistry }

1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

212


As per ICH related substances stability trend limit from initial to shelf life

1700




1027


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1208


Tell me about analytical method validation in QC

1788






what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

679


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1390


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

896


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

940


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

6936


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2413


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1045


what is the difference between potentiometric titration and karl fischer titration?

1055


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1295


In performance Check of GC Why Hexadecane Peak is Considered 

1752