Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is a differance between assay by HPLC and assay by titration?

5 20541

what is PH of 0.1N Hcl, 0.01N Hcl & Mehanol.

3 40629

what is batch no. of prednisole tablet.

Dr Reddys,

8 9734




HOW RRF IS CALCULATED IN HPLC

2 8917

why should we do limit of stray light in UV calibration and why should use potassium chloride

2 24205

why ph is between 0 to 14

Reliance, Zydus Cadila, Apotex,

6 17178

what is the definition of limit of stray light in UV calibration

Zydus Cadila, FDC,

1 21294

what is the dipolement and how it is related to IR

Aurobindo, AJ Square Inc,

1 5824




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

Reddy Labs,

5 14265

why hexane is used for FID calibration in GC

Glochem,

1 2710

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

Zydus Cadila,

3557

how to prepare 5normality of hcl

2 39456

in pentoperazole capsules usp why assay value is substract from dissolution

Ranbaxy,

1 1965

diference b/w packed &capilary columns

2 5531

how to prepare 5 normality of h2so4 solution

Symbiotec,

3 50289


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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]

1474


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

961


In IR spectra, generally a molecule vibrates without apply emr or ir light?

534


what is procedure of actual procedure for registration of drug?

607


about method developement in hplc

374






what is peak purity and its formula

180


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

759


How we can determine water content in piperazine

872


What are the primary considerations in extractables and Leachables ?

989


What is viod volume and peak purity in HPLC?

1328


In performance Check of GC Why Hexadecane Peak is Considered 

1752


As per ICH related substances stability trend limit from initial to shelf life

1700


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

1964


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

1490


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

2086