Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can u seperate polar compounds in hplc ?

Meditab, Piramal Healthcare,

1 4839

what is the difference between hplc and uplc?

Mylan, Fresenius Kabi,

5 5438

what is the basis of separation in chromatography?

Anthem,

1 3934




what is the diference between spectroscopy and chromatography

Cipla, PharmChem, Reliance,

2 7408

Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong? 

Ranbaxy, Claris Otsuka,

3 5401

what is internal standard define

Apex, Hikma Pharmaceuticals, IPCA, Coromandel International Limited,

2 1584

pharma industries oriented

Apex, Micro Labs, Zydus Cadila,

863

gc Calibration % RSD failed what is the possible reasons?

Divis Laboratories,

4 5941




What is the procedure for the calibration of ph meter?

IBS,

1 2076

What are the parameters for the method development of Gas Chromatography and GC-HS? 

2 2983

What is the difference between purge septum flow and column flow in gas chromatography?

814

how much mass should be there in volumetric flask while in preparation of sample for assay? 

Reddy Labs,

1201

U have 4 strengths have different coating meterial which one u chose to do forced degradation stady in validation

Reddy Labs,

1 1963

Tell me about analytical method validation in QC

Petronas,

2024

what is procedure of actual procedure for registration of drug?

665


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Un-Answered Questions { Analytical Chemistry }

pharma industries oriented

863


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

811


What is stray light in uv what are units for stray light

267


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

3117


Why irmoisture balance is used for corrugated box moisture testing

1093






What is the main difference between ODS1 and ODS2 Hplc column.

1958


how can give the expiry period and restadardisation of volumetric solution

1322


mode of absorption in alimentary canal?

1188


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

332


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?

1907


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

1014




1076


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

736


what is definition of validation? which components are followed give detail?

934


Basic principle of ESI?

866