Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the difference between potentiometry assay and HPLc assay?

Apotex, Torrent Power, Aurobindo, Divis Laboratories,

2 11359

how std. of znso4

1 2623

Which std. used for standrdisation of ZnSO4?

953




In GC and HPLC ,how we can decide which of following method will be suitable or use for quantitation of chromatogram at the time of method development. 1.Area Normalisation 2.External standard method 3.Internal standard method

Atul,

1 4399

In Stability testing if significant change occurs then what will be the action plan?

Cipla,

2 7456

what is mean by profiling of dissolution

1 5208

How decided 10 ppm standard solution in Swab, rinse method.?

1 5587

WHAT IS THE LIQUID PHASE IN DB-624 COLUMN IN GCHS

3 5761




In capadity factor formula is K'= (RT of main compound/RT of first eluted peak)-1 in this formula what is 1

Piramal Healthcare,

1 4523

WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

778

Why we inject a standard 6 times for Related substances by HPLC and 5 times for Assay?

GVK,

3 11869

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

APL,

1305

hii, i'm had a sample of 1L that gone through extraction & evaporation. i used 0.5ml of methanol for reconstitution before injecting the sample to HPLC. i made a calibration curve using a standard solution but now i'm confused about how to display the concentration i got from the sample. for ex. i got 0.2ug/ml how i'm gonna explane this is for the 1L ? please help .. i'll really appreciate it thanks

1 2117

Dear Sir, This is Thirunavukkarasu am working in Ordain Health Care AR&D, Am Having one problem While doing method development my question Metadoxine and Pyridoxine same chemical nature and structural activity i tried lot of methods but Analyte eluted same Retantion time i cant separate both peaks. solubility, pH both are same only only difference melting point metadoxine 210 C Pyridoxine 102 C please do the help needful for me

Ordain Solutions,

5 5107

some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

Micro Labs, VMSRF,

1074


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

What is the difference between known and unknown impurities?

154


what type of question will ask in the interview of lab chemist.

2015


what is the difference between potentiometric titration and karl fischer titration?

866


Tell me about analytical method validation in QC

1439


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1087






What are the primary considerations in extractables and Leachables ?

927


What is column in chromatography?

723


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

979


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1048


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

842


if you have given a blank water how you analyse by general analytical techniques?

626


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

896


why we use a particular hplc column for a particular compound give reasons?please

1415


In performance Check of GC Why Hexadecane Peak is Considered 

1683


what is weight veriation in pharma industry ? plz explain me

958