Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

1 2554

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

1 2252

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

Claris Lifesciences,

5 8539

How to caluculate the RRF and correction factor in hplc

Alkem Labs, Aurobindo, Rakshit Drugs, SDLPL,

1 13175

What is the optimum period of storage of indicators?

Orchid Chemicals and Pharmaceuticals,

1 3786

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

Dr Reddys, Piramal Enterprises,

1 4598

How much carbon loading in nomalphase columns?

5 6171

Chromatographic Purity is a Qualitative analysis

Shasun Chemicals,

2 4612

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 2050

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?

2307

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

Caplin Point, Epione Labs, Hetero,

2 6019

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

Natco,

1 3826

What is the use of ELSD in HPLC?

Anthem,

3 5467

What is difference between FID and TCD in gas chromatography

Cipla, VPCPL,

1 9451

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

Cipla,

1 6520


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

A ha tc is actual defination of retention time?

1151


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

1429


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

2691


why octanol used to determine the partition coefficient ?

2007


i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me

2277






in which situation ion pair require to use?

384


What is mean by PDR?

411


Which is the highly polar and highly non polar column in HPLC?

1874


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

1192


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

389


in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

434


What is third generation HPLC Columns?

1581


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

452


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

1766


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

2203