Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is kf principal

Indian Immunologicals, Dr Reddys,

5 8163

What do you mean by potency in Analytical industry

3 5440

Did anybody have method for acetyl cysteine effervescnce tablet

848




What are the primary considerations in extractables and Leachables ?

Mylan,

955

When ever we perform system suitability,inject the corresponding standard 6 times why? is thair any reson

4 6129

what is the difference between Hydrochloric Acid & Hydrogen chloride

3 5786

What is intact assay method development.....?

Orchid, Neon,

1059

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

Reddy Labs, Aurobindo,

1613




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.

VHB Medi Life Sciences,

1036

Which Zone of our country like conducting of Stability studies(Accelerated & Long term stability studies)as per ICH guidelines.

4 7825

what is difference between assayand potency

Hetero,

4 7852

What is the difference between GSC & GLC?

3 18244

pda detector mechanism?

Teva Pharmaceuticals, DKR,

966

in uv visible spectroscopy calibration why we are using potasium dichromate and tolune

Reddy Labs,

3 5258

why in hplc peaks are in positive side(it means upside) not in negative side?

3 6924


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Un-Answered Questions { Analytical Chemistry }

In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1442


Why Ethanol is Used for Standardization of GC Head space?

2564


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

1981


what is procedure of actual procedure for registration of drug?

570


what is the structure of DOWEX-50

3565






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?

827


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

632


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

2362


what is turbidimetric titration?Give 2 examples.

1002


Why sodium hydroxide used for maintain pH of phosphate buffer

859


what is the difference between potentiometric titration and karl fischer titration?

953


what is the origin to prepare standard operating procedure

914


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

911


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5125


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

811