[Fluorescence spectroscopic analysis of huminite of the peat and soft brown coal]

The huminite of the peat and soft brown coal in the Zhenan basin, western Yunnan, has been studied by means of fluorescence microscopy. The study reveals that the fluorescent features of the huminite are considerabably complicated: some huminite, like liptinites, can give out dark yellow to yellow fluorescent light, I546 ranging from 8.13 to 13.17; and the fluorescent spectrum having one peak or two peaks, lambdamax ranging from 555 to 585nm and Q650/500 from 0.60 to 2.93. Most of huminites do not give out fluorescent light or give out dark brown fluorescent light, I546 ranging from 0 to 5.38. Because of having extraordinarily weak fluorescent light, it is very difficult to obtain their fluorescent spectrum. Nevertherless, after being stimulated for several minutes, some huminites that do not give out fluorescent light or give out dark brown fluorescent light may give out yellowish brown to dark orange fluorescent light, I546 ranging from 6.12 to 12.17, lambdamax. from 590 to 615nm and Q650/600 from 3.49 to 4.31. With the stimulating time becoming longer (10 to 20min), some huminites,may give out sharper yellow fluorescent light, I546 ranging from 12.18 to 20.01, lambdamax from 555 to 595nm and Q650/500 from 0.87 to 1.60.