Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why we use pyridine to determine moisture content of acetonel

Lee Pharma,

2 8670

What impact analysis required for out of calibration and how to proceed

Aventis,

2 4878

Which type of analysis we have to done uv spectroscopy

2 6658




From where 16 or 5.545 is derived in theoretical plates calculation formula by USP or JP/BP/DAB and what is meaning of this coefficient and impact in calculation ?

Nectar Lifesciences,

2 7837

What is the difference between uplc and hplc

Hetero, AAU Assam Agricultural University,

4 21273

What is meaning of audit trail in hplc

Raks Pharma, Lee Pharma, DRL,

3 18767

How we can determine OOT limit in Stability

MSN Pharma,

1 9502

why we are using k2cr207 in uv calibration ? why we r not using kmno4?

Glochem, Sidmak Laboratories,

1 3719




can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

Cipla, XYZ,

913

WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

Glochem,

1162

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

865

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

Perkin Elmer,

6060

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?

5828

What is the difference between Spectroscopy and spectrophotometry,What are the applications?

Cipla, Caplin Point,

4 7184

What is difference b/t uv detector and rid

5 5896


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

What is method validation in quality control

2401


What is Band broading effect explain

562


My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

197


what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

7028


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

678






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

863


What is aggregate and fragments in SEC?

651


Why potassium dichromate was using in Uv calibration?

442


How would you decide dissolution medium for NCE compound of class I drug

728


Explain the relations between number of carbon atoms in alkanes and retention time ?

626


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

254


iam usig ph buffers merk. manually how to prepare ?

987


all types of questions asked at the cipla interview

3344


What is the principle of Thermal conductivity detector and FID?

1424


why does used dry caffien in HPLC calibration?

587