滑石粉去卷积法在中红外光谱教学中应用

Deconvolution methods of talcum powder in middle infrared spectroscopy teaching

采用中红外(MIR)光谱(包括:一维MIR光谱、二阶导数MIR光谱、四阶导数MIR光谱和去卷积MIR光谱)分别开展了滑石粉的结构研究。试验发现,滑石粉结构的红外吸收模式主要包括:滑石粉结构OH伸缩振动模式(ν_(OH-滑石粉))、滑石粉结构结晶水弯曲振动模式(δ_(H_(2)O-滑石粉(水)))、滑石粉结构Si-O伸缩振动模式(ν_(Si-O-滑石粉))、滑石粉结构OH弯曲振动模式(δ_(OH-滑石粉))和滑石粉结构中含有少量的白云石的特征红外吸收谱带(ν_(-滑石粉(白云石)))。研究发现:滑石粉的主要成分为水合硅酸镁和少量白云石。

The talcum powder structure were characterized by the middle infrared(MIR)spectroscopy(including:one-dimensional MIR spectroscopy,second derivative MIR spectroscopy,fourth derivative MIR spectroscopy,and deconvolution MIR spectroscopy).The infrared absorption mode of talcum powder included talcum powder OH stretch vibration mode(νOH-talcum powder),talcum powder(crystalline water)bending vibration mode(δ■),talcum powder Si-O stretch vibration mode(νSi-O-talcum powder),talcum powder OH bending vibration mode(δOH-talcum powder)and the characteristic infrared absorption spectrum of a small amount of dolomite in talcum powder(ν-talcum powder(dolomite)).The main components of talcum powder were hydrated magnesium silicate and a small amount of dolomite.