Detection of methanol vapor by surface plasmon resonance method

Abstract

The possibility of using the device based on the physical phenomenon of surface plasmon resonance to detect the methanol vapor in the air of the working premise was considered in the paper.Therefore, the PPR method, which has high sensitivity, speed and ability to use small samples of investigated gaseous substance is of interest.Experimental studies have confirmed the possibility of using the phenomenon of surface plasmon resonance to detect methanol vapor in accordance with the requirements of the MAC (5 mg/m3, which corresponds approximately to 0.37 vol%). Virtually linear dependence for two sections was determined:a. at the methanol concentration in the air from 0.05 to 1vol%, which covers the MAC values for the given substance. An analytical description of the dependence Δθ = 0,1068 C+0.0568, where Δθ is the difference in the SPR angle minima, C is the methanol concentration, and the approximation accuracy is R2=0,992 was found.b. at the methanol concentration in the air from 1 to 40 vol%, a graph of the concentration dependence is approximated by the virtually linear dependence Δθ = 0,0128 C+0.121 with the approximation accuracy of R2=0,998.