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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 5284

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

 2 6562

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?

 3485

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?

 1783

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

 1 7195

Whatn is HPLC

HPLC, Jubilant, Orchid,

1 6533

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

Nakoda Chemicals,

3 8831

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

Nakoda Chemicals,

2 5381

why holmium perchloate solution in Uv calibration

Alembic,

2 9695

why do we have to used saturated ammonia in TLC

Cipla, IPCL, Mylan,

3 10489

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 5675

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

Mankind,

2 7295

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 5867

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

 1742

which light is used in FT-IR spectroscopy

Hetero,

6 16103

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Un-Answered Questions { Analytical Chemistry }

How to start the dissolution development for unknown tab?

1134

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?

1294

Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

274

what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

3100

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

3981




using gradient pressure in gas chromatography are not ?using gradient pressure why

2932

[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

299

if rsd failed then what require to do?

311

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

1512

how you start RS method development when for new product?

281

WHY given much noise PDA dector then VWD Dector

1494

How to know the estimated LOQ concentration in ppm

723

how require to interprit the method precision data of hptlc?

286

what is the disso medium for tropsiun chloride

1793

if you given one product then which tests you will perform?

311

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