Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is differences between the Instrument and Equipment

Aurobindo,

2 561

Why dissolution test apparatus calibration with salycilic acid tablets was stopped by FDA&USP from the year of 2009?

1 542

What is UV cut off?

Sanmar,

1 585




What is the importance of sulphated ash test?

1 507

What is impurities in pharma analysis?

1 379

What are the different zones in stability according to ICH?

Apotex,

1 504

According to ICH,India is coming under which climatic zones?

Cipla,

1 549

How does GC did work?

1 270




Which detector is used in uv-vis spectrophotometer?

Glenmark,

1 582

Why chromic acid wash is not recommended by USP for glassware cleaning?

Lupin,

1 359

What is the difference between ROI & sulphates ash?

1 514

What is difference between NDA & ANDA ?

1 551

What is Rf value& Rx value in TLC?

1 477

What are the six USP melting point reference standards?

1 371

What is the size of capillary tube used for analysing melting point?

Apotex,

1 415


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Un-Answered Questions { Analytical Chemistry }

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

3203


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2667


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

1091


WHY pKa value is more important than pH value of the mobile phase in HPLC?

316


how you determine moist.of NaOH sol or NaOH flacks

1129






why are measure gas flow " ml " in Gas chromatography

463


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

8731


What is third generation HPLC Columns?

804


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

1413


Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

385


mahagenco syllabus for the post of chemist

4990


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

969


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

1084


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

742


How to choose the which salt is suitable for mobilephase

1784