-
公开(公告)号:US6140647A
公开(公告)日:2000-10-31
申请号:US994787
申请日:1997-12-19
CPC分类号: G01N21/65 , G01N21/3577 , G01N21/359
摘要: Reformulated gasoline (RFG) testing recently required by EPA involves measuring sulfur, olefin, aromatic contents, Reid Vapor Pressure (RVP), and benzene, distillation properties, plus total air pollutants (TAPs), volatile organic carbon (VOC), and nitrogen oxides (NOx). Measuring driveability, although not required, is desirable. All of these tests can be conducted by spectrometer, preferably in the IR range, more preferably in the NIR range, and most preferably by a single instrument operating at high-correlation wavelengths. Importantly, VOC, TAP, NOx, and RVP may be correlated to IR absorbance at certain bands. Statistical methods including PLS, MLR, PCR, and neural networks can be used and derivatives of first, particularly second, or other orders can be used. Results can be displayed on a single screen.
摘要翻译: EPA最近要求的重组汽油(RFG)测试包括测量硫,烯烃,芳烃含量,里氏蒸气压(RVP)和苯,蒸馏性能,加上总空气污染物(TAP),挥发性有机碳(VOC)和氮氧化物 (NOx)。 虽然不需要测量驾驶性能是可取的。 所有这些测试可以通过光谱仪进行,优选在IR范围内,更优选在NIR范围内进行,最优选通过在高相关波长下工作的单个仪器进行。 重要的是,VOC,TAP,NOx和RVP可能与特定条件下的IR吸光度相关。 可以使用包括PLS,MLR,PCR和神经网络的统计方法,并且可以使用第一,特别是第二或其他顺序的导数。 结果可以显示在单个屏幕上。