Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is dwell volume in HPLC?

Aurobindo, Sun Pharma, SUN, Cadila, Strides,

2 3932

what does pH stand for?

Orchid,

4 3999

Definition of beers_ lamberts law

Agio Pharmaceuticals, Aarti Industries, Emcure, Supriya Lifescience,

4 3148




Why monograph of hplc coming upperside of drift but in IR monograph coming in drift side?

1 1798

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

Zim Laboratories,

883

Why the ph limit (1_14) Is used?

Cipla,

2 4100

What is cut off value of solvent used in hplc

Pfizer,

1 3118

How to calculate mass balance in RS after degradation

Reddy Labs,

1 2307




if out of two set of results of moisture analysis first 1 is passing, second one is failing, is it oos ? or vice a versa first 1 is failing and second one is passing. for information mean value to be reported and in mean value the substance is ppassing, is it oos or normaal mean value to be considered?

JBCPL,

1 1453

Can we interpret accuracy from linearity in method validation?

Lupin, Dr Reddys,

700

What is aggregate and fragments in SEC?

582

how pyridine can be analysed other than GC?

1 1905

What is the calibration of uv process and preparation

Aurobindo,

621

How to prepare 1000ppm methylene blue solution

2 3110

Identify problem faced when mass spectroscopy is used with HPLC system ?

College School Exams Tests,

636


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Un-Answered Questions { Analytical Chemistry }

why we are using hexane in calibration of number of drop per mL

183


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6658


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

522


What is the diference between residual solvents and organic volatile matter

628


how the compound separate in coulunm,explain

967






What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5128


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

1187


why octanol used to determine the partition coefficient ?

920


what is weight veriation in pharma industry ? plz explain me

986


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

1269


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

173


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

241


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?

828


Why dissolution test is not performed in all of the products

1136


how can give the expiry period and restadardisation of volumetric solution

1247