masnmrBNC²³⁶²¹³⁺¹ 例句 Non framework aluminum and surface composition of5A molecular sieves for dewaxing were studied by MASNMR and XPS. 采用 MASNMR方法研究了5A脱蜡分子筛的骨架硅铝结构，用 XPS方法研究了样品表面的原子组成。 cnki Synthesized saponites and Al-pillared saponites have been characterized by XRD, chemical analysis, IR, MASNMR and TPD. 用 XRD、化学分析、 IR、 MASNMR、 TPD等手段表征了合成皂石及其铝交联物的结构。 cnki