Method for simultaneously detecting ethanol and MTBE (methyl tert-butyl ether) in gasoline by photoelectric double-signal and detector

Abstract

The invention discloses a method for simultaneously detecting ethanol and MTBE (methyl tert-butyl ether) in gasoline by a photoelectric double-signal and a detector with simple structure, easy operation, low running cost (using air as a carrier gas), favorable stability and reproducibility and high detecting efficiency and precision. A nano catalytic luminescent detector is used for carrying out detection, and the used nano material is a composite material of tin oxide and nickel oxide; the nickel oxide accounts for 25-45 percent of total mass of the composite material, and the detecting wavelength is between 400nm and 460nm; the nano material has the heating temperature range of 200-300 DEG C, and the flow rate of the carrier gas is between 20ml / min and 200ml / min; and the voltage is applied to both ends of the nano material, and the generated current is used as a detecting signal. Compared with the prior art, the detector is respectively provided with a positive electrode and a negative electrode at both ends of a nano semiconductor metal oxide, and a current output and photoelectric signal converting device between the positive electrode and the negative electrode is connected with an electric signal detecting circuit.

Description

Technical field: [0001] The invention relates to a method and detection equipment for detecting ethanol and methyl tert-butyl ether (MTBE) in gasoline, especially a simple structure, easy operation, low operating cost (air is used as carrier gas), and good stability A photoelectric dual-signal simultaneous detection method and detector for ethanol and MTBE in gasoline with high reproducibility, detection efficiency and precision. Background technique: [0002] The composition of gasoline is very complex, with hundreds or even thousands of known components. Currently, ethanol gasoline commonly used in the market is a kind of blended gasoline, that is, ethanol is added to gasoline (such as E10 gasoline, that is, 9.5% to 10.5% (V / V) ethanol is added), and the content of ethanol added is an indicator that must be inspected; Because MTBE can significantly increase the octane number of unleaded gasoline, it is often added to blended gasoline. However, because MTBE is difficult to...

AI Technical Summary

Problems solved by technology

However, since the catalytic luminescent signals of ethanol and MTBE are close, it is difficult to distinguish the catalytic luminescent signals flowing through the surface of nano-catalytic materials. Sometimes it is necessary to change the analysis conditions to separate the signals. directly affect the accuracy of quantitative analysis

So far, there are no related reports on the method and detector for the simultaneous detection of ethanol and MTBE in gasoline using catalytic luminescence and electrochemical signals on the surface of nanomaterials

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