Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is the purpose of Buffer in any titration?Ex:In determination of hardness of water we use ammonia ammoniachloride buffer in titration with EDTA.Why?

Amity, Sr Comunications, Prakriti,

13 77678

why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?

GVK, Sohan Healthcare, Aurobindo,

10 44193

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

Neuland,

3143




What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 10500

When performing Moisture content how to you say only Methanol react with water not product Explain?

Orchid,

2 7496

give me method of calculating co relation of coefficient for HPLC,SOR & ANY OTHER

1 2002

difference between pH & pOH ?

4 17513

what r the reasons to get peak telling?

Cipla,

6 10608




How we develop a method by HPLC for unknown compound,if we got three peaks with same response then how we can find out which one is our desired compound's peak without taking help of LC MS.

Apotex, Kemwell,

4 10368

In case of dissolution test, if there is variation within 6 individual units however the batch is complying as per S1 criteria, is it necessary to do investigation for the same? What should be the criteria for such variation?

1 2732

What is the difference between bulk property detectors and Solute property detectors vivimed labs limited

3 11953

IF THE COMPOUND PKA IS 5.3 WHY WE ARE ADJUSTING PH+/-2 OF THE COMPOUNDS PKA. WHAT IS THE CONDITION

Dr Reddys, Reddy Labs,

2 7436

What are the limits for uniformity dosage content for tablets and capsules

Micro Labs,

5 15841

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 6496

IN DISSOLUTION TEST S1AND S2 AND S3 CONDITIONS ALL ARE FAILED THEN WHAT IS THE DESSICION U CAN TAKE

Cipla,

12 17198


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Un-Answered Questions { Analytical Chemistry }

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?

1078


how the compound separate in coulunm,explain

1077


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

913


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

6217


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1226






what is procedure of actual procedure for registration of drug?

693


could negative ions be produced by bombardment process in mass spectrometry?

238


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

378


Why Ethanol is Used for Standardization of GC Head space?

2670


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1360


what is turbidimetric titration?Give 2 examples.

1166


why we are using hexane in calibration of number of drop per mL

278


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

889


In performance Check of GC Why Hexadecane Peak is Considered 

1819


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

3648