Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how to calibrate hplc & gc

Cipla,

3180

Explain in detail what are the procedure and calculations involved for accuracy (%Recovery)in method validation?

Vimta Labs,

1 4572

WHAT IS DIFFERENCE BETWEEN RRT AND RRF IN HPLC

Cadila,

2 40879




what is mean by Q in S1 and S2

Micro Labs,

3 7576

what is the difference between mcg and ppm?

5 20841

WHAT IS THE DIFFERENT BETWEEN PURITY, POTENCY AND ASSAY

Hetero, Glochem,

5 44461

How we can perform Linearity study for validation by HPLC with very low conc of sample

1 5253

principle of FTIR

Biocon, Macleods,

2 13890




what is separation techniques.

Glenmark,

1 1502

what is the difference b/w repeatability nd reproducibility ?

Aptuit Laurus,

1 7603

why using factor 1.00639 in burette calibration of kf

Cipla,

1 6233

what type of questions asked on analytical balance and also give answers................all pharma companies?

Sun Pharma,

6594

Why KBr is used in FTIR ?

6 10482

How to study genotoxicity of impurities in API?

NCL,

2 3242

What is the difference between chiral cel OD-H & OD-RH ?

Aptuit Laurus,

3 7773


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Un-Answered Questions { Analytical Chemistry }

about method developement in hplc

456


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1735


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

3762


Why a1% value is used for some product ? What is the criteria for selection a1% value ?

1045


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5612






Why potassium dichromate is used in calibration of uv?

416


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

1158


How to choose the which salt is suitable for mobilephase

1764


For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

20


Why Ethanol is Used for Standardization of GC Head space?

2702


What is stray light in uv what are units for stray light

321


how the compound separate in coulunm,explain

1111


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.

772


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

1505


what is the principle involved in turbidometry and nephelometry ?

2636