Study on the Fast Quantitative Analysis of the Content of DME Adulterated in LPG
ZHU Zhi-qiang1, YUAN Hong-fu1*, HU Ai-qin1, SONG Chun-feng1, LI Xiao-yu1, WU Ming-qing2
1. College of Materials Science and Engineering, Beijing University of Chemical Technology，Beijing 100029，China 2. Research Institute of Petroleum Processing，Beijing 100083，China
Abstract：A new analytical method of analyzing dimethyl ether (DME) content in liquefied petroleum gas (LPG) is proposed in this paper. An unsolved problem about quick detection of the composition of LPG has been settled with this method. A set of precise preparation apparatus for DME/ LPG solution and a set of quickly analytical system of LPG based on near infrared technology were designed. The analytical equipment can be conveniently connected to the sampling cylinder because it can bear 3.5 MPa pressure. Oblique projection algorithm was used to separate the pure spectra of DME from that of the LPG’s solutions. The standard curve of the concentration of DME (c) has been built by using the Intensity (I) of pure signal of DME in the LPG solution and the concentrations. The correlation coefficient of the equation is 0.999 4. The result of external validation shows that the relative error is less than 2.0%. The new method has the advantages such as fast, easy and noneed of expensive multivariate modeling.
朱志强1，袁洪福1*，胡爱琴1，宋春风1，李效玉1，吴明清2 . 液化石油气中二甲醚含量快速测定方法研究 [J]. 光谱学与光谱分析, 2016, 36(04): 978-980.
ZHU Zhi-qiang1, YUAN Hong-fu1*, HU Ai-qin1, SONG Chun-feng1, LI Xiao-yu1, WU Ming-qing2 . Study on the Fast Quantitative Analysis of the Content of DME Adulterated in LPG. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(04): 978-980.
[1] Chen Z Y, Jiang L S, Jian L I, et al. Technology & Development of Chemical Industry, 2013，42(8)：45. [2] Chu X, Lu W. Electronic Instrumentation Customers, 2013, 2: 002. [3] He K, Qian F, Cheng H, et al. Chemometrics and Intelligent Laboratory Systems, 2015, 140: 117. [4] LIU Wei, ZHAO Zhong, YUAN Hong-fu, et al(刘 伟，赵 众，袁洪福，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2014, 34(4), 947. [5] Graham S F, Haughey S A, Ervin R M, et al. Food Chemistry, 2012, 132(3): 1614.
