METHOD FOR MEASURING NUCLEAR MAGNETIC RESONANCE

摘要

PURPOSE:To obtain an information relating to a bonding with hydrogen nucleus near a quarternary carbon atom by irradiating 90 deg. pulse of nonobserving nucleus having high intensity or a high intensity high frequency wave decoupling the nonobserving nucleus in wide band range with synchronizing to 180 deg. pulse of the observing nucleus. CONSTITUTION:90 deg. pulse and 180 deg. pulse for <13>C observation are irradiated to a sample at a time (t) as shown in a figure (b) by a timing signal (a). FID generated with the lapse of the time (t) after irradiating 180 deg. pulse is sampled and sent to a computer. A decoupling high frequency wave (e) having sufficient intensity and spreaded frequency band range by the noise modulation is irradiated with synchronizing the time of 180 deg. pulse irradiation. Thereby, the information relating to hydrogen atoms surrounding the quarternary carbon atom can be obtained. Instead of irradiating the noise modulated decoupling high frequency, 90 deg. pulse of hydrogen nucleus can be also irradiated with synchronizing to 180 deg. pulse of carbon nucleus as shown in a figure (h).