汽油、炼油中苯含量检测方案(红外光谱仪)

InfraLUMFT-08INFRARED FOURIERSPECTROMETER山、WWW.LUMEX.BIZ DETERMINATION OF BENZENE IN GASOLINE GOST 51930-2002ASTM D 4053-04(2009)EN 238-2004 INTRODUCTION Benzene is formed in gasoline in the process of oil refining and gasoline production. Determination ofbenzene in gasoline is an important task， because benzene and its products reacting with the products ofincomplete combustion of gasoline are highly toxic. Moreover， the presence of benzene increases foulingthat eventually may damage the engine. Therefore， regulations impose limit on the content of benzene ingasoline in many countries， and international standards exist to come up to this requirement. The infrared spectroscopic methods provide monitoring of benzene in gasoline， as benzene has distinctabsorption peaks in the IR spectral region. The existing methods ensure determination of the benzenecontent in the range 0.1 vol.% to 5 vol.%. Basing on the obtained results of analysis， one can promptly respond to the deviations of the qualityparameters of gasoline during the production process， which ensures high quality of the gasoline andoptimize production costs. MEASUREMENT METHOD A sealed liquid cell is filled with the analysed sample and is installed in the cell compartment of an InfraLUM@FT-08 FTIR spectrometer. Infrared spectrum of the sample is recorded in a range of 690-440 cm"， withresolution of 2 cm" and scanning time of 60 s. ADVANTAGES OF InfraLUM@ FT-08 SPECTROMETERS Easy to operate High selectivity . Spectrum scanning takes just one minute No sample pretreatment needed Various accessories may be used for analysis EQUIPMENT AND REAGENTS FOR ANALYSIS The following equipment and reagents are used for analysis： Fourier-Transform Infrared spectrometer InfraLUM FT-08 (with software)； Sealed liquid cell of fixed pathlength 0.25mm； . Personal computer. EXAMPLE OF ANALYSIS OF A REAL SAMPLE Screenshot of the region of the absorption spectrum ofgasoline with a resolution of 2 cmand scanning time of60 s. The characteristic absorption peak of benzeneisobserved at the 673 cm'wavenumber， which providesits identification and determination of its content ingasoline. Concentration is calculated using the softwarefor InfraLUM FT-08 FTIR spectrometer. The information in this leaflet is supplemental. To get more specific information on this method，please contact the developer of this application Lumex Ltd. 苯是在炼油和汽油生产过程中形成。汽油中苯的测定是一项重要的工作，因为苯及其产物与汽油不完全燃烧产物有很高的毒性。此外，苯的存在形成的污垢，最终会损坏发动机。因此，在许多国家制定法规对汽油中的苯含量进行限制，并且有国际标准对此作出要求。红外光谱法可以监测汽油中的苯，因为苯在红外光谱区具有不同的吸收峰。现有的方法确保苯的体积含量在0.1%-5%的范围内。 汽油中苯含量的变化可以及时反映汽油生产过程中汽油质量参数的偏差，保证汽油质量，优化生产成本。