Vahur Signe, Knuutinen Ulla, Leito Ivo
Institute of Chemistry, University of Tartu, Jakobi 2, 51014 Tartu, Estonia.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Aug 15;73(4):764-71. doi: 10.1016/j.saa.2009.03.027. Epub 2009 Apr 8.
It is demonstrated that micro-ATR-FT-IR in the low wave number range (500-230 cm(-1)) can be well used for identification of pigments in paint samples thereby markedly extending the possibilities of pigment identification by ATR-IR spectroscopy into the realm of pigments having no absorptions in the mid-IR region. Reference spectra of pigments can be conveniently obtained by mixing them with linseed oil in approximately 1:1 mass ratio. Vermilion (or cinnabar), read lead, different red iron oxide pigments and cadmium red can be identified. In some cases the method can be used alone for pigment identification and in many cases it provides useful additional evidence for pigment identification using other instrumental techniques (electron microprobe analysis, XRF, optical microscopy).
结果表明，低波数范围（500 - 230 cm(-1)）的显微衰减全反射傅里叶变换红外光谱（micro-ATR-FT-IR）可很好地用于鉴定涂料样品中的颜料，从而将衰减全反射红外光谱法（ATR-IR）鉴定颜料的可能性显著扩展到在中红外区域无吸收的颜料领域。通过将颜料与亚麻籽油按质量比约1:1混合，可方便地获得颜料的参考光谱。朱砂（或辰砂）、铅丹、不同的红色氧化铁颜料和镉红均可被鉴定。在某些情况下，该方法可单独用于颜料鉴定，在许多情况下，它为使用其他仪器技术（电子微探针分析、X射线荧光光谱法、光学显微镜）进行颜料鉴定提供了有用的额外证据。
