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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how to prepare solution in ppb

6 16364

how to prepare low ppm solution from high ppm solution ?

1 8512

wt is difference between assay and purity in hplc?

Hetero, IDRS Labs,

9 80310

difference between AAS & flame photo meter ?

3 34344

how to calibrate AAS ? give me the procedure?

3 12979

why peak purity not considered in GC?

DRL, Reddy Labs, Vimta Labs,

4 14293

from compund pka value how to select buffer and column?

Emcure, Zydus Cadila,

2 7979

what is Beer Lambert low ?

MAN,

8 13659

principle of AAS & its uses ?

Auriga,

1 3793

how ir specrometer is calibrated ?

1 4766

what is pKa ?

Dr Reddys, Shasun Chemicals,

10 16423

How you can calculate pKa ?

Dr Reddys,

6 14902

what buffer you can select for acidic nature analyte and how ?

Dr Reddys,

2 11795

What is Specificity ?

Dr Reddys,

8 12035

Whya the need of Specificity to do in Analytical Method Validation ?

Dr Reddys,

5 12327


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Un-Answered Questions { Analytical Chemistry }

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

4500


WHY given much noise PDA dector then VWD Dector

1082


how will you do the prep for unstable componds?

1047


why does used dry caffien in HPLC calibration?

1116


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

772






Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

977


What are the primary considerations in extractables and Leachables ?

1392


from where i get mortar pastle for glass bottle crush? it's required for testing of it?

1245


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?

965


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,

1516


How to check hplc detecter sensitivity?

669


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

1547


Why perchloric acid used for potentiometric titration

1728


As per ICH related substances stability trend limit from initial to shelf life

2240


What is the calibration of uv process and preparation

1113