Selective detection of biexponential relaxation in isotropic solutions by mixed coherence filtering NMR.
This is a trial to simplize sequences to get the relaxation function f31(t), which is usually detected by the double- or triple-quantum filtered (DQF or TQF) NMR in an isotropic phase. The results indicate that only two phase cycling is needed to get the f31(t) function, which shows the advantage of S/N (signal-to-noise ratio) in a minimum acquisition time. The filtering of coherence levels in the creation time need not be limited to double- or triple-quantum coherences. An 87Rb signal from a 4% (w/w) agar powder in 500-mM RbCl solution is recorded at 130.9 MHz as a Larmor frequency using a Bruker MSL 400 spectrometer.
Yamada
H
H
Institute of Applied Physics, University of Tsukuba, Ibaraki, 305, Japan.
Takeuchi
J
J
Nakamura
H
H
Seo
Y
Y
Tasaki
A
A
Erata
T
T
D002712:Chlorides / Q000737:chemistry; D007089:Image Enhancement; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008962:Models, Theoretical; D012413:Rubidium / Q000032:analysis / Q000737:chemistry; D012996:Solutions / Q000737:chemistry*
D002712:Chlorides; D012996:Solutions; D012413:Rubidium; C032710:rubidium chloride