Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how to prepare solution in ppb

6 13422

how to prepare low ppm solution from high ppm solution ?

1 7298

wt is difference between assay and purity in hplc?

Hetero, IDRS Labs,

9 70087




difference between AAS & flame photo meter ?

3 29979

how to calibrate AAS ? give me the procedure?

3 11540

why peak purity not considered in GC?

DRL, Reddy Labs, Vimta Labs,

4 11913

from compund pka value how to select buffer and column?

Emcure, Zydus Cadila,

2 6574

what is Beer Lambert low ?

MAN,

8 11143




principle of AAS & its uses ?

Auriga,

1 3092

how ir specrometer is calibrated ?

1 3988

what is pKa ?

Dr Reddys, Shasun Chemicals,

10 13936

How you can calculate pKa ?

Dr Reddys,

6 12819

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

Dr Reddys,

2 10533

What is Specificity ?

Dr Reddys,

8 10223

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

Dr Reddys,

5 10890


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Un-Answered Questions { Analytical Chemistry }

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

846


Why perchloric acid used for potentiometric titration

848


cefoperozone and sulbactam inj. hplc test method

1248


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

5730


How to choose concentration of LOQ solutions for RS analysis? Example.

735






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?

292


Why irmoisture balance is used for corrugated box moisture testing

1038


Difference between hlaf and rlaf

675


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

1751


could negative ions be produced by bombardment process in mass spectrometry?

177


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

213


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

760


what is difference between zero air gas and o2 gas

6076


Why potassium dichromate is used in calibration of uv?

271


why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1235