Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why urasil use in hplc column perfomance?

Bayer,

1 8160

how do you perform reverse enginearing study for drug containing sodium chloride sodium citrate sodium bicarbonate

Strides,

1 3974

How will u perform degradation study in detectors other thann PDA in HPLC Methodology

Adley, Micro Labs,

2257

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

2346

what is the working priniciple of ph, what are parts in ph meter

1 9604

why using the ph 4,7,9.2?

SRF,

1 5590

What is Temperature ?

Reddy Labs,

2 9996

What is the column performance and column efficiency?

Reddy Labs,

1 10614

why we are using in ph calibrations ph4,7,9.2 buuffers only?

Reddy Labs, Unichem,

3 17001

Is it necessary to validate both assay and related substances for usp official methods for products.

Apotex,

6 12839

why we use a particular hplc column for a particular compound give reasons?please

Dr Reddys, Indoco Remedies, Natco,

2470

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

Reddy Labs,

2167

what is the difference between lod and loq?

Apotex, Aurobindo,

4 36017

What should be the level/ Percentage of Arsenic in Arsenic free zinc.

FDC, Laurus, Pharmaceutical,

1955

What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

Dr Reddys,

1 4614


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Un-Answered Questions { Analytical Chemistry }

what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

2428


What is the formula for relative diffrence for standard solution in solution stability in validation?

503


What is rs test why we are performing rs test?

1519


Difference between the quantitative analysis and qualitative analysis?

843


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

8592


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

2672


In Dissolution Test why limit is define Q+5% what is the role of +5%.

2800


if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?

629


How to establish relative response factor for hplc. Why it is required?

929


how you fix the limits of impurities?

559


What is the use of tlc and hplc? And when and where use?

862


What is the calibration of uv process and preparation

1703


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

2145


WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

1825


why we use glass fiber filters use in some situation?

544