【摘要】 建立了内标表面增强拉曼光谱测定水性有机涂料中石墨含量的方法。以聚丙烯酸丁酯乳液为标准基材,加入不同体积的石墨悬浮液,并以硫氰酸钾（KSCN）为内标,加入纳米银溶胶后制成不同石墨含量的工作样品,采集拉曼光谱。1584cm^-1为石墨的特征峰（G峰）,2124cm^-1为内标的特征峰,以两峰面积之比制作标准曲线,线性关系良好,5000目石墨和200目石墨的相关系数r²分别为0.999 4和0.993 4。对于5000目石墨,最低检出限（LOD）为0.12%,方法精密度为6.99%,聚丙烯酸丁酯基材和聚醋酸乙烯酯基材的加样回收率分别为79.49%和76.29%,均满足检测要求。该方法简便、快速、准确,可作为含碳材料成分的水性有机涂料的质量控制手段。更多还原

【Abstract】 The surface-enhanced Raman spectroscopy method with internal standard was established to determine graphite in water-borne organic paints.The working samples,which were tested by Raman spectroscopy,were prepared by adding graphite into poly（butyl acrylate）latex substrate,followed by pipeting potassium thiocyanate（KSCN）as internal standard and silver nano-particles（Ag NP）.Since 1584 cm^-1 was recognized as graphite’s G peak while 2124 cm^-1 as KSCN’s peak,standard curve was made by calculating the ratio of the two peaks,which exhibited good linearity with r²=0.999 4 and 0.993 4 for 5000 mesh graphite and 200 mesh graphite,respectively.For 5000 mesh graphite,the limit of detection（LOD）is 0.12%,and precision was 6.99%.The spiked recovery of poly（butyl acrylate）and polyvinyl acetate substrates was 79.49% and 76.29%,respectively.All the indices met the testing requirements.This method was convenient,rapid and accurate,and could be used as the quality control method for water-borne organic paints with carbon materials.更多还原