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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 5324

How much is the standard area for glc analysis

1331

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

DRL,

1560

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

Orchid,

3 6980

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

Ajanta,

1 6152

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

Cipla, Rampex Labs,

3053

What the difference in loss on drying and residue on ignition

2 25909

Why irmoisture balance is used for corrugated box moisture testing

Leiutis, Lupin,

1474

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

Aurobindo, Enaltec Labs,

4 16764

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 29567

Is sonication essential in solubility testing of a drug substance?

Aurobindo,

6 12530

what is different between volumetric solution and general solution

1 16873

what is primary solution and secondary solution

2 6401

what is RI detector Cut-off Value

Mylan,

1 8174

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

MSN Pharma,

2 9351


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Un-Answered Questions { Analytical Chemistry }

Principle of single pan analytical balance

4171


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2999


What is control room temperature and which guide line says?

761


What is a difference between potency and purity?

108


in gas chromatography what is the difference between gas flow rate and average linear velocity ?

1393






As per ICH related substances stability trend limit from initial to shelf life

2242


WHY given much noise PDA dector then VWD Dector

1084


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?

1321


Why perchloric acid used for potentiometric titration

1729


Why we check moisture,ash & AIA in product

951


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

1736


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

1890


What is the diference between residual solvents and organic volatile matter

1072


How can we calculate offset value pH measurment

611


How would you decide dissolution medium for NCE compound of class I drug

1169