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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why urasil use in hplc column perfomance?

Bayer,

1 8922

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

Strides,

1 4470

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

Adley, Micro Labs,

2500

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

2582

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

1 10050

why using the ph 4,7,9.2?

SRF,

1 6104

What is Temperature ?

Reddy Labs,

2 10548

What is the column performance and column efficiency?

Reddy Labs,

1 11033

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

Reddy Labs, Unichem,

3 17704

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

Apotex,

6 14064

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

Dr Reddys, Indoco Remedies, Natco,

2705

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

Reddy Labs,

2425

what is the difference between lod and loq?

Apotex, Aurobindo,

4 37228

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

FDC, Laurus, Pharmaceutical,

2189

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

Dr Reddys,

1 5096


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

why does used dry caffien in HPLC calibration?

2003


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

3194


why multimedia dissolution require to do?

759


If inhouse hplc related substance method is completly diffrent from Usp for finished proďuct with diffrent impurities then how require to prove method equivalecy?

753


if content uniformity passing but dissolution varrying then what is next step?

833


what is the origin to prepare standard operating procedure

2275


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

2620


how we can identify the impurity is coming below loq at transfering site?

833


Why perchloric acid used for potentiometric titration

2652


What is column in chromatography?

2199


how you start RS method development when for new product?

687


What is Band broading effect explain

1842


Related substance method equivalency on control sample or spiked sample?

735


Loss of linearity in tkn analysis, possible reasons?

1285


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

2500