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Organic Chemistry (342) - Inorganic Chemistry (123)
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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 9917what 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 8066Practically why we get negative absorption in UV SPECTROPHOTOMETER when the time of cleaning sample analysis. is negative absorption in Uv valid or not?
2378I 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?
3509In 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.
3091Why d-blo Ick elements are called outer while f-block elements called inner transition elements
1 4268If 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 8004
if instrument calibration fails then what require to do?
As a researcher working with Protactinium, what areas of study or applications would you be most interested in pursuing, and why?
in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?
What is delay volume?
Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?
HPLC in sequences analysis was taken wrong method and one blank & Standard is running so what to do
What is the requirement for brazil in the analytical method vslidation comparr to ich?
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
on the basis of bcs class how to proceed the solubility?
what is the difference between elctrefining and electrolysis?
Why is eriochrome black t indicator cannot be used in this experiment?
What general group of organic compounds are not oxidesied in the cod test?
For water content determination, if the material is insoluble in methnaol and ethylene glycol mono methyl ether, what other diluent can we use.
in each media we require to use SLS? how to proceed?
why athanol-water mixtuere have maximum viscocity in wt% 40?
