Chemical Instrumentation: A Systematic ApproachAddison-Wesley Publishing Company, 1973 - 903 pagine |
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Pagina 558
... CHEMICAL SHIFT Proton NMR spectrometry is used routinely as a qualitative analytical technique , especially in identifying pure organic compounds . The dominance of proton spectro- scopy may be traced to the widespread occurrence of ...
... CHEMICAL SHIFT Proton NMR spectrometry is used routinely as a qualitative analytical technique , especially in identifying pure organic compounds . The dominance of proton spectro- scopy may be traced to the widespread occurrence of ...
Pagina 560
... chemical shift of a given nuclear magnetic species and its bonding . First , bonding to another atom of greater electronegativity should deshield the magnetic nucleus and shift its resonance downfield , i.e. to a lower value of Ho ...
... chemical shift of a given nuclear magnetic species and its bonding . First , bonding to another atom of greater electronegativity should deshield the magnetic nucleus and shift its resonance downfield , i.e. to a lower value of Ho ...
Pagina 578
... compound 1 2 3 CICH2CH2CH2Br . For convenience in discussion the carbon atoms have been numbered . a ) How many different sets of equivalent protons are there ? = 3.57 . b ) Predict roughly the chemical shift and multiplicity of each ...
... compound 1 2 3 CICH2CH2CH2Br . For convenience in discussion the carbon atoms have been numbered . a ) How many different sets of equivalent protons are there ? = 3.57 . b ) Predict roughly the chemical shift and multiplicity of each ...
Sommario
Measurement and Instrumentation | 1 |
Basic Electrical Variables | 25 |
9 | 47 |
Copyright | |
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absorbance absorption amplitude analysis analyzer angle anode applied atoms beam Beer's law capacitance capacitor cathode cell circuit of Fig components concentration constant coulometry curve detection detector determined device diagram differential diode dispersion drop electrical electrode electrolysis emission emitter energy equation example excited feedback filter flame fluorescence frequency grating impedance incident input instrument intensity ionization ions magnetic measurement mercury meter method module molecular molecules monochromator noise obtained Ohm's law operational amplifier optical output voltage oxidation p-n junction peak phase photometer photomultiplier polarized polarography potential potentiometer precision prism proton pulse R₁ R₂ radiation range ratio RC circuit readout redox reduced refractive index resistance resistor resonance result sample scan schematic Section sensitivity shown in Fig signal slit solution species spectral spectrometer spectrophotometer Spectroscopy spectrum substance techniques temperature Thévenin equivalent titration transistor tube V₁ vibrational wave wavelength Wheatstone bridge width ΚΩ