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 3556

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

2 4737

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?

2413




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?

858

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

1 5367

Whatn is HPLC

HPLC, Orchid, Jubilant,

1 4589

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

Nakoda Chemicals,

3 5698

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

Nakoda Chemicals,

2 3652




why holmium perchloate solution in Uv calibration

Alembic,

2 7598

why do we have to used saturated ammonia in TLC

Mylan, Cipla, IPCL,

3 7857

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 3631

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

Mankind,

2 5292

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 4301

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

942

which light is used in FT-IR spectroscopy

Hetero,

6 11825


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Un-Answered Questions { Analytical Chemistry }

what is the origin to prepare standard operating procedure

947


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1081


how to get accurate result for Residue on evaporation in purified water

258


Why potassium dichromate is used in calibration of uv?

271


What is third generation HPLC Columns?

689






some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1136


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

1444


what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

1177


mode of absorption in alimentary canal?

1138


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

554


Why perchloric acid used for potentiometric titration

847


What is the difference between spectro meter and spectro photo meter?

8407


what is turbidimetric titration?Give 2 examples.

1051


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

1390


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

535