浅埋泥炭中的木栓质体的荧光光度术研究

A FLUORESCENCE PHOTOMETRY STUDY ON THE SUBERINITE IN THE SHALLOW BURIAL PEAT

对滇西镇安盆地浅埋泥炭中的木栓质体进行了较详细的研究，研究表明木栓质体是稳定组分中最不稳定的，它可以被氧化分解，导致结构和光学性质的变化，尤其是后者的变化显著。未氧化的木栓质体的荧光光谱颜色为绿色，Ｉ５４６介于１．５～２．０之间，荧光光谱呈单峰状；λｍａｘ介于４８０～５１０ｎｍ；Ｑ６５０５００介于０．１２～０．２６；半波宽１５０ｎｍ。但是，被氧化、分解的木栓质体则发黄色或黄褐色的荧光，Ｉ５４６减小到１以下，甚至０．０５。λｍａｘ增加到５８０～６１０ｎｍ，Ｑ６５０５００增加到２．７５～３．３１。随荧光激发时间的增长，木栓质体的荧光性质会发生变化，主要表现在荧光强度和荧光光谱上，随荧光激发时间增长，未被氧化、分解的木栓质体，其荧光强度为负变化，荧光光谱出现红移，λｍａｘ增大。然而，被氧化、分解的木栓质体随荧光激发时间增长其荧光强度则出现正变化，荧光光谱则向蓝光方向漂移，λｍａｘ明显变小。

A detailed study of the suberinite in the shallow burial peat from Zhenan basin,western Yunnan,has been carried out.The study has revealed that the suberinite is the most unstable maceral among all the stable macerals.It may be oxidized and/or decomposed,resulting in changes in the structure and,especially optical feature.The fluorescence light of the suberinite that has not been oxidized and decomposed is green with I546 ranging from 15 to 20;and the fluorescence spectrum has one peak:λmax ranging from 480 to 510nm;Q650500 ranging from 012 to 026;semiwave width averaging 150nm.Nevertheless,those suberinites that are oxidized and/or decomposed give off yellow or yellowish brown fluorescent light and the I546 reduces to less than 1,even to 005;λmax increases from 580 to 610nm;Q650500 from 275 to 331.With illuminating time going by ,the fluorescence feature of the suberinite could be changed,mainly in the fluorescence intensity and fluorescence spectrum.The suberinite that has been not oxidized and/or decomposed changes negetively in fluorescence intensity and its fluorescence spectrum moves towards red light wavelength.Nevertheless those suberinites that have been oxidized and/or decomposed change positively in fluorescence intensity and the fluorescent spectrum moves towards blue light wavelength.