The determination of pyridine adsorption of samples revealed that materials have a typic characterization of proton acid, and the proton acid centers increased with the increase of s content.
磺酸基很好地嵌入孔壁基质中，吡啶吸附测定显示了典型的质子酸特征，而且酸中心随硫含量增加而增多。
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A new reversed phase high performance liquid chromatography method is described for the simultaneous determination of pyridine, 2-aminopyridine, 2-methylpyridine and 2-pyridinecarboxylic acid.