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Dipolar Dephasing(D.D.)技术在研究煤和干酪根的结构中具有一定的优点,通过一系列不同T_D时间的D.D.实验,可计算出非质子芳碳或非质子脂碳的比例,但耗时太长,Wilson等曾提出了用于煤中芳碳D.D.测定的快速估算方法,即对要测定的样品仅作T_D=O_(μs)和T_D=40_(μs)两次NMR
Dipolar Dephasing (DD) technology has certain advantages in studying the structure of coal and kerogen. A series of DD experiments with different T_D times can calculate the proportion of aprotic aromatic carbon or aprotic carbon but take too long , Wilson et al. Have proposed a rapid estimation method for determination of aromatic carbon DD in coal, that is, T_D = O_ (μs) and T_D = 40_ (μs)