[Discussion of the characteristic indexs in using three-dimensional fluorescence method to identify different crude oils].
The present paper investigates the influence of solvent purity on the test of three-dimensional fluorescence spectra, determines the process of its pre-purification, and studies the influence of the concentrations on the three-dimensional fluorescence characteristic indexes such as the characteristic peaks position, fluorescence intensity (F), and ratio (R) of fluorescence intensity when the phenomena of fluorescence quenching won't appear. The result shows that the concentration affects the value F and value R largely but its effect on the relative peak intensity (R(s)) is relatively small. Different crude oils has different value R(s). According to those characteristics, this paper presents that the value R(s) can be used as a new characteristic index for identification of crude oil. This conclusion was confirmed by testing many crude oils stably and reliably from different areas with their concentrations at 5 mg x L(-1). This method can be applied to identify most crude oils preliminary and further accurate analysis can be carried out together with other index.
Zhao
Yan
Y
Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518131, China. zhaoyan73@126.com
Zhang
Shi-Yuan
SY
Ling
Ping
P
Li
Si-Yuan
SY
Huang
Kai-Sheng
KS
Zhou
Yong-Sheng
YS
Xie
Yue-Liang
YL