Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

i set electrode to 7 buffer than i used it to check 4 buffer and 10 buffer if the results are not as expected than is it better to set the buffer again to 4 buffer or is there any other method available please let me know ...

Glochem,

2 4526

How much is the standard area for glc analysis

913

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

DRL,

1186




what type of compounds do we see lod @ wat type compounds do we see m.c

Orchid,

3 5790

How can the GC or HPLC method is selected to determine the impurity profile in drug product?

Ajanta,

1 5387

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

Cipla, Rampex Labs,

2400

What the difference in loss on drying and residue on ignition

2 20627

Why irmoisture balance is used for corrugated box moisture testing

Leiutis, Lupin,

1037




why we are used 4,7,9,2 buffers for the ph calibration

Aurobindo, Enaltec Labs,

4 14365

In case of HPLC coloums what is the difference Between C8 & C18 coloums & how can we select difference type of coloums like Inertial ODS , Hypersil BDS , ODS etc.?

MSN Pharma,

4 24999

Is sonication essential in solubility testing of a drug substance?

Aurobindo,

6 10557

what is different between volumetric solution and general solution

1 13966

what is primary solution and secondary solution

2 5228

what is RI detector Cut-off Value

Mylan,

1 7301

In Related Substances Test how we can reside the limit of impurity ?

MSN Pharma,

2 8306


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Un-Answered Questions { Analytical Chemistry }

what is the disso medium for tropsiun chloride

882


How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

1843


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

177


give clarity of linearity and range in method validation

929


can i use hplc detector to uplc and why?

925






Why to use propyl paraben in HPLC gradient calibration

446


Why a1% value is used for some product ? What is the criteria for selection a1% value ?

924


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


What is gelatinization?

367


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

5725


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1044


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

940


sop of a uv visible spectrophotometer double beam elico model

4121


What is FFA, PV, and PAV value in oil.

554


How you develop a method in HPLC?

1269