Nuclear magnetic resonance spectroscopy internal standards

Thom, K.A. Folan, D.W. MacCarthy, P. Characterization of the international humic substances society standard and reference fulvic and humic acids by solution state carbon-13 O C) and hydrogen-1 OH) nuclear magnetic resonance spectroscopy , U.S. Geological Survey, Water Resource Investigations Report, Denver, Co, 1989 89-4196, pp. 1-4. [Pg.75]

Purification was performed by preparative TLC. The compounds obtained were analyzed by Ultraviolet, Infrared and Nuclear Magnetic Resonance spectroscopy and by Gas Chromatography-Mass Spectrometry (GC-MS). The GLC analysis was carried out with a Perkin Elmer mod.990 equipped with a flame ionization detector, on a glass column OV 17 3%. NMR spectra were measured with a Varian 100 MHz for solutions in deuterated chloroform with tetramethyl-silane as internal standard. IR spectra were performed on a Perkin Elmer mod. 157 G in chloroform solution. GLC-MS spectra were carried out with an LKB 9000 at 70 eV. and a glass column OV 17 at 235 C. [Pg.63]

International Standard Organization ISO 10632 2000 Oilseed residues—Simultaneous determination of oil and water contents—Method using pulsed nuclear magnetic resonance spectroscopy. [Pg.142]