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 4568

How much is the standard area for glc analysis

935

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

DRL,

1202




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

Orchid,

3 5846

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

Ajanta,

1 5423

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

Cipla, Rampex Labs,

2438

What the difference in loss on drying and residue on ignition

2 20884

Why irmoisture balance is used for corrugated box moisture testing

Leiutis, Lupin,

1059




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

Aurobindo, Enaltec Labs,

4 14496

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 25244

Is sonication essential in solubility testing of a drug substance?

Aurobindo,

6 10642

what is different between volumetric solution and general solution

1 14175

what is primary solution and secondary solution

2 5298

what is RI detector Cut-off Value

Mylan,

1 7333

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

MSN Pharma,

2 8354


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Un-Answered Questions { Analytical Chemistry }

from where i get mortar pastle for glass bottle crush? it's required for testing of it?

898


What is the purpose of octyl silane columns?

2645


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1095


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?

353


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2494






Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1322


calibrtion procedue of LC-MS

1269


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

1279


how can give the expiry period and restadardisation of volumetric solution

1297


In performance Check of GC Why Hexadecane Peak is Considered 

1771


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1025


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 ?

1152


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

699


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1225


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

2119