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很多微粒状氧化物表面都带有羟基,其数量多少直接影响它的吸附性、亲水性、表面电荷及催化活性。例如作为橡胶填料用的微粒状二氧化硅表面羟基对橡胶的增强和老化起很大作用;用于色谱分析的担体硅胶表面羟基多少明显地影响其分离效果;某些金属氧化物表面羟基含量与其催化活性也有一定关系。因此对这类物质表面羟基的测定具有一定的实际意义。作者曾报道使用LiAlH_4-气相色谱法分析有机硅氧烷中的羟基含量。后来证明此法也可用于测定填
Many particulate oxide surfaces have hydroxyl groups, the number of which directly affects its adsorption, hydrophilicity, surface charge and catalytic activity. For example, as a rubber filler for the surface of silica particles on the surface of silica rubber to enhance and aging play a significant role; for chromatographic analysis of the surface of the silica gel on the number of hydroxyl significantly affect the separation effect; some metal oxide surface hydroxyl content and its Catalytic activity also has a certain relationship. Therefore, the determination of hydroxyl on the surface of these substances has some practical significance. The authors have reported the analysis of hydroxyl groups in organosiloxanes using LiAlH4-gas chromatography. Later proved that this method can also be used to determine the fill