Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is differences between the Instrument and Equipment


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?


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?


1 504

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


1 549

How does GC did work?

1 270

Which detector is used in uv-vis spectrophotometer?


1 582

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


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?


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)?


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


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


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


how you determine moist.of NaOH sol or NaOH flacks


why are measure gas flow " ml " in Gas chromatography


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


What is third generation HPLC Columns?


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


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


mahagenco syllabus for the post of chemist


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.


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


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


How to choose the which salt is suitable for mobilephase