Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

Watson Pharmaceuticals,

1 3426

we run the same sample in same method in different flow rates in HPLC,any changes in sample analysis?

2 4580

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2219




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?

797

if the flow rate is increases then any changes in retention time in hplc

1 5159

Whatn is HPLC

HPLC, Orchid, Jubilant,

1 4456

what is the limit of Correlation for IR test compare to the standard and test

Nakoda Chemicals,

3 5438

IS THERE ANYWHERE MENTION THAT THE RE PROCESS BATCH REQUIRE TO KEPT STABILITY STYDY

Nakoda Chemicals,

2 3525




why holmium perchloate solution in Uv calibration

Alembic,

2 7336

why do we have to used saturated ammonia in TLC

Mylan, Cipla, IPCL,

3 7676

stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?

Nakoda Chemicals,

2 3458

how to correct peak when peak comes broader in shape? How to do calibration of HPLC?

Mankind,

2 5065

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 4078

What is importance of pH in the Heavy metal test and How it effect on the test results?

863

which light is used in FT-IR spectroscopy

Hetero,

6 11464


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Un-Answered Questions { Analytical Chemistry }

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

697


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1370


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1733


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?

881


In performance Check of GC Why Hexadecane Peak is Considered 

1683






In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1305


Difference between hlaf and rlaf

601


Tell me about analytical method validation in QC

1444


Why irmoisture balance is used for corrugated box moisture testing

968


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

1585


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

844


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

5682


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

1175


WHAT IS THE USE OF STARTER ?????????

1006


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

237