泥炭、软褐煤中的芳香烃的荧光特性

Flnorescence Features of the Aramatic Hydrocarbon of the Peat and Soft Brown Coal

对滇西镇安盆地泥炭、软褐煤氯仿沥青“Ａ”中的芳香烃进行了较详细的荧光光度术研究。在蓝光激发下，初始态芳香烃发绿色荧光，接着迅速转变为黄色，进而转变为橙黄色或黄橙色，其Ⅰ_（５４６）很大，介于１２．５０─６０．２０之间，远大于泥炭、软褐煤中的稳定组分的相应值。Ⅰ_（５４６）呈快速负变化；初始态芳香烃荧光光谱为单峰状，λ_（ｍａｘ）为５１０─５４５ｎｍ，总体在５２０─２５ｎｍ，Ｑ_（６５０／５００）为０．３５─１．０６，总体为０．４５─０．５５。随激发时间增长，光谱变为双峰状，λ_（ｍａｘ）及Ｑ_（６５０／５００）均随激发时间增长而出现先增大后减小的变化趋势。

The aramatic hydrocarbon of the chloroform bitumen 'A' in the peat and soft brown coal from the zhenan basin, werstern yunnan,has been investigated indetail by means of fluorescence photometry. When it is exited by blue light, the aramatic hydrocarbon gives out green fluorescence at the beginning, then yellow fluorescence, and at last yellowish-orange fluorescence. The I546 is between 12.50 to 60.20, much more larger than that of the liptinites in the same peat and soft brown coal samples, being zero in about decates of seconds and a few minites. The fluorescence spectrum has one peak firstly, λmax being between 510-545nm, mostly between 520-525nm; Q650/500 ranging from 0.35-1.60, mostly from 0.45-0.55.With time of exciting increasing, the spectrum become with two peaks,λmax and Q650/500 are all changed to become larger firstly and then smaller.