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 3599

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

2 4800

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?

2451




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?

878

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

1 5414

Whatn is HPLC

HPLC, Orchid, Jubilant,

1 4620

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

Nakoda Chemicals,

3 5789

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

Nakoda Chemicals,

2 3697




why holmium perchloate solution in Uv calibration

Alembic,

2 7674

why do we have to used saturated ammonia in TLC

Mylan, Cipla, IPCL,

3 7939

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 3668

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

Mankind,

2 5354

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 4348

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

954

which light is used in FT-IR spectroscopy

Hetero,

6 11928


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Un-Answered Questions { Analytical Chemistry }

what is partion and column chromatography

1034


What is method validation in quality control

2401


Explain the relations between number of carbon atoms in alkanes and retention time ?

626


What is Band broading effect explain

562


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1154






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?

1010


what is the purge flow & how to calculate

1174


How to determine water content of bis tetrazole amine mono ammonium salt

1936


why we should take dst factor for below 1%moisture samples

1402


How to start the dissolution development for unknown tab?

306


how can give the expiry period and restadardisation of volumetric solution

1295


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

1506


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1201


can i use hplc detector to uplc and why?

944


what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.

703