Chemistry Interview Questions
Questions Answers Views Company eMail

which detector is used in IR

Hetero,

3 13643

why hexadecane is used in calibration of FID IN GC THERE IS NO REMAINING SOLVENTS

DRL, Hetero, MSN,

1 7051

WHY POTASSIUM HYDROGEN PTHALATE IS USED FOR PERCHLORIC ACID? What is difference btw UV detector & RID detector? what is dissolution? What is unit of KF? what is the significant of pH in HPlc?

1 9079

what is dissolution What is unit of KF? what is the significant of pH in HPlc? WHY POTASSIUM HYDROGEN PTHALATE IS USED FOR PERCHLORIC ACID? What is difference btw UV detector & RID detector?

1 7286

Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not?

1945

I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2946

Hplc detect how much ppm solutions i want range

4 9857

If we change lenght of ph eletrode wire then it will affect on ph ?

2 6998

In kf constant term 16 what it is explain ?

2 7546

Why dissolution apparatus having 8 jars ?

5 14711

What is the unit of Colour?

IPCA,

4 9472

who is the father of HPLC?

Cipla, IPCA,

6 19173

In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

2574

Why d-blo Ick elements are called outer while f-block elements called inner transition elements

1 3593

If i performing one analysis on C8column then the same analysis done on C18 column then what will happen about Rt;Resulution;Peak shape Explain ?

1 7251


Un-Answered Questions { Chemistry }

what is the significance of control of absorbance in UV?

1764


Why to use propyl paraben in HPLC gradient calibration

6014


Why is the role of glycerol & naoh?

576


What kinds of structural changes accompany bond-breaking and bond-forming in olefin polymerization? : Polymer Chemistry

1202


Why we check moisture,ash & AIA in product

1381






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

1309


for inorganic molecules require to do RS, Assay and disso?

226


How do we fix the sample concentaryion in hplc method development. What is the basis?

649


write short note on steroids,terpenes,prostagladins,and phospholipids.

5568


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1733


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

1432


Why do we use vaccum in Loss on drying test?

1192


How hydrate is forming along with API?

1779


Actinium is a radioactive element. How is its radioactivity utilized in various practical applications or fields?

112


Explain the difference between the law of multiple proportions and the law of definite proportions?

554