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 9079what 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 7286Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not?
1945I 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?
2946In 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.
2574Why d-blo Ick elements are called outer while f-block elements called inner transition elements
1 3593If 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
what is the significance of control of absorbance in UV?
Why to use propyl paraben in HPLC gradient calibration
Why is the role of glycerol & naoh?
What kinds of structural changes accompany bond-breaking and bond-forming in olefin polymerization? : Polymer Chemistry
Why we check moisture,ash & AIA in product
What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
for inorganic molecules require to do RS, Assay and disso?
How do we fix the sample concentaryion in hplc method development. What is the basis?
write short note on steroids,terpenes,prostagladins,and phospholipids.
why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?
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
Why do we use vaccum in Loss on drying test?
How hydrate is forming along with API?
Actinium is a radioactive element. How is its radioactivity utilized in various practical applications or fields?
Explain the difference between the law of multiple proportions and the law of definite proportions?