Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why urasil use in hplc column perfomance?

Bayer,

1 5807

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

Strides,

1 2382

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

Micro Labs, Adley,

1286




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

1149

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

1 7349

why using the ph 4,7,9.2?

SRF,

1 3458

What is Temperature ?

Reddy Labs,

2 7391

What is the column performance and column efficiency?

Reddy Labs,

1 8379




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

Reddy Labs, Unichem,

3 12593

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

Apotex,

6 8488

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

Dr Reddys, Natco, Indoco Remedies,

1563

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

Reddy Labs,

1269

what is the difference between lod and loq?

Aurobindo, Apotex,

4 26544

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

Pharmaceutical, Laurus, FDC,

1082

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

Dr Reddys,

2567


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Un-Answered Questions { Analytical Chemistry }

What is importance of pH in the Heavy metal test and How it effect on the test results?

1007


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

386


what is the structure of DOWEX-50

3775


why are measure gas flow " ml " in Gas chromatography

426


1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

1218






acceptance criteria for lod & loq by standard deviation of response and slope??

1236


give clarity of linearity and range in method validation

999


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

355


What is the difference between spectro meter and spectro photo meter?

8618


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

939


In performance Check of GC Why Hexadecane Peak is Considered 

1823


How to do regeneration of Metacarb Pb plus column?

1316


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

604


What are the primary considerations in extractables and Leachables ?

1056


what is the principle involved in turbidometry and nephelometry ?

2581