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 Categories >> Sciences >> Chemistry >> Analytical Chemistry
 
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Question Asked @ Answers Views     Select
In performance Check of GC Why Hexadecane Peak is Considered     0  8
why we get only one peak in assay by hplc but in rs by hplc get more peaks    0  11
difference between quality and quantity    0  10
wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language    0  8
How can you prepare 0.1% Phosphate buffer solution?    1  20
various methos to calculate precision in validation methods in HPLC?    0  14
acceptance criteria for lod & loq by standard deviation of response and slope??    0  11
how can you decide API molucule acedic or basic compound by test?    1  23
in hplc calibration injector linearity pass,it means inj and det is good. why to perform detector linearity is it required, if it is required,what is difference between injector and detector linearity in hplc calibration    1  31
IF WE INCREASE FLOW RATE RT DECRESE.WHY    2  36
Why using 0.5% acetone in methanol mobile phase for HPLC Gradient performance check. drl   1  44
How can you prepare 0.05M Ammonium acetate volumetric solution?    2  28
WHY KBr is used in IR Spectroscopy gvk   1  40
How to use RF and rrf in Rs calculation( either multiply or divide)? micro-labs   0  30
Is there any difference in principal of reverse phase and normal phase chromatography? and why? Please update. Thank and regard msn-pharma   2  77
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Un-Answered Questions
 
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What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3 380
4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations 216
what is the structure of DOWEX-50 840
In burette calibration of Karl fischer Instrument, the multiplication factor 1.00693 is using for how much ml of water dispenced. why 406
What is the difference between spectro meter and spectro photo meter? 1491
why we use sodium salicylate in uv light calibration at TLC chamber 843
How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters. 214
How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method? 629
in loss on drying Why follows on constant weight not more than 0.5 mg, any region 208
How to determine water content of bis tetrazole amine mono ammonium salt 29
what is main use of primary standards in caliration 265
how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn, 177
why inject diluted standard solution in related substance analysis by HPLC? 66
What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example. 337
what type of questions asked on analytical balance and also give answers................all pharma companies? 599
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