Rapid detection of fuel adulteration using microfabricated gas chromatography
Rapid detection of fuel adulteration using microfabricated gas chromatography
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DOI：
10.1016/j.fuel.2020.119387
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发表时间：
2021-02-15
期刊：
影响因子：
7.4
通讯作者：
Agah, Masoud
中科院分区：
文献类型：
--
作者：
Chowdhury, Mustahsin;Gholizadeh, Azam;Agah, Masoud
燃料掺假的快速和准确的质量控制是一个主要的经济和健康问题。当前的技术缺乏提供快速准确的销售点（POS）解决方案的能力。便携式解决方案的大部分工作都依赖于吸收光谱，它提供了一个定性的解决方案，在速度和准确性之间进行权衡。本文介绍了一种基于微型气相色谱（μ GC）的便携式，快速，准确的分析柴油掺煤油的技术。分离柱使用微机电系统（MEMS）技术制造。这些柱子长1米，由嵌入式柱子阵列组成。两种不同的固定相涂层进行了检查，以探讨所提出的技术的有效性。分析依赖于芯片的积极压力和温度编程，以获得部分分离的色谱图。当用成熟的化学计量学方法如主成分分析和偏最小二乘回归分析时，确定了色谱图和柴油纯度之间的线性关系。该分离柱仅用4秒的色谱分析就可以分辨出柴油中添加的5%的煤油。
Rapid and accurate quality control for fuel adulteration is a major economic and health concern. Current technology lacks capability to provide speedy and accurate point of sale (POS) solutions. Most of the work done on portable solutions rely on absorbance spectroscopy, which provide a qualitative solution with a trade-off between speed and accuracy. This paper demonstrates a technique based on micro gas chromatography (mu GC) for portable, fast, and accurate analysis of diesel fuels adulterated with kerosene. The separation columns are fabricated using microelectromechanical systems (MEMS) technology. The columns are 1 m-long and consist of an embedded array of pillars. Two different stationary phase coating were examined to explore the efficacy of the proposed technique. The analysis relies on aggressive pressure and temperature programming of the chip to obtain partially separated chromatograms. When analyzed with well-established chemometrics methods such as Principal Component Analysis and Partial least Squares Regression a linear relationship between the chromatograms and diesel purity was determined. The separation column could discriminate as little as 5% added kerosene to diesel fuel with only four seconds of chromatogram analysis.