Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why water content test performed

1 3689

What is peak purity and response factor in chromatographic analysis? Why we required to find out response factor?

2 3903

What are modes of quantification in related substances

Hospira,

919




what is the source of ir spectroscopy

Mylan, CTX Life Sciences,

2 4498

Difference Between End Cap HPLC Column and Non End Cap Column

2 8486

Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

Petronas, Shanghai Ocean University,

692

How would you decide dissolution medium for NCE compound of class I drug

759

What is the principle of hplc detectors like.. UV detector,flurosence detector, RID?

Cipla,

1257




What is the principle of Thermal conductivity detector and FID?

Cipla,

1451

why 6 tablets use for dissolution

Teva Pharmaceuticals, Cadila, IPCA, SUN,

1908

What is the limit of minimum area in in hplc RS anlysis

Lupin,

1 2710

how many types oos and oot

1 1991

what is icdas abbrivation

1 2010

Why should we use Potassium iodide and Hydrochloric acid during preparation of Iodine Molar solution?

1 1794

How can you calculate manually "Slope" in pH calibration?

Hetero,

2 11684


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Un-Answered Questions { Analytical Chemistry }

how can give the expiry period and restadardisation of volumetric solution

1322


explain 5 components of gas chromatography ?

697


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?

2100


Why potassium dichromate was using in Uv calibration?

515


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?

1051






what is the disso medium for tropsiun chloride

940


what is definition of validation? which components are followed give detail?

933


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

731


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]

1538


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1447


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

2033


all types of questions asked at the cipla interview

3377




1076


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

892


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

1034