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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how does h2so4 prevent oxidation of mohr salt before it is titrated?

1 1325

In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

1 1169

in HPLC injection volume is increase ,R.T will increase ?

Claris Lifesciences,

5 6468

How to caluculate the RRF and correction factor in hplc

Alkem Labs, Aurobindo, Rakshit Drugs, SDLPL,

1 9065

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 2866

what is the most common FT-IR source used for the MID&Near IR regions?

Dr Reddys, Piramal Enterprises,

1 3604

How much carbon loading in nomalphase columns?

5 3913

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 3146

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.

Atul,

1 1056

Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

1480

Why we use methanol as solvent in kf standardisation. Why not other solvent?

Caplin Point, Epione Labs, Hetero,

2 4477

if relative response factor is 1.07, to select how much value

Natco,

1 2897

What is the use of ELSD in HPLC?

Anthem,

3 3789

What is difference between FID and TCD in gas chromatography

Cipla, VPCPL,

1 6512

What is the difference between high pressure gradient and low pressure gradient in hplc?

Cipla,

1 5025


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Un-Answered Questions { Analytical Chemistry }

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

213


Why are use silicon oil mr?

176


can i use hplc detector to uplc and why?

1332


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

531


what is the disso medium for tropsiun chloride

1255






Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

1255


WHAT IS THE PARAMETER FOR THE SELECTION OF MOBILE PHASE IN HPLC?

170


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?

2902


Tell me something about Vitamin A test method by HPLC

1683


Why perchloric acid used for potentiometric titration

1645


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1376


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

2201


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

1048


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

634


what is %labelled amount in content uniformity of dosage unit and its calculation?

4034