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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 9997what 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 8141Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not?
2404I 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?
3540In 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.
3128Why d-blo Ick elements are called outer while f-block elements called inner transition elements
1 4331If 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 8099
How we can identify process related and degradation impurity in single method with short period?
if rsd failed then what require to do?
Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and appearance? suggest?
Give an example of a polysaccharide?
what is biorelivent dissolution media?
How does the viscosity vary with temperature?
could negative ions be produced by bombardment process in mass spectrometry?
What is a proteic unit?
I need organic mixture analysis viva questions & answers
Sr-90, a radioactive isotope, is a major product of an atomic bomb explosion. It has a half life of 28.1 year. Calculate the first order rate constant for this nuclear decay and the fraction of 90Sr that remains after 10 half lives?
What is si unit of viscosity-coefficient?
how you start the solubility study?
in gas chromatography what is the difference between gas flow rate and average linear velocity ?
Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?
Why to use propyl paraben in HPLC gradient calibration
