Device and method for quickly detecting ethyl acetate on line
An ethyl acetate, fast technology, used in measuring devices, color/spectral property measurements, instruments, etc., can solve problems such as sensors that do not have ethyl acetate gas yet
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Embodiment 1
[0021] Such as figure 1 Shown, a kind of device of quick detection ethyl acetate on-line, this device comprises ethyl acetate gas sensor, weak luminescence measuring instrument 6 and temperature controller 5; Described ethyl acetate gas sensor comprises the chemiluminescence reaction chamber with gas inlet and outlet , optical filter 3 and photomultiplier tube 4, described chemiluminescence reaction chamber is coated with nanometer GeO by quartz glass tube 2 and the surface inserted therein 2 The ceramic electric heating rod 1 is composed of, the optical filter 3 is arranged on the outside of the quartz glass tube 2, the light-receiving surface of the optical filter 3 is parallel to the ceramic electric heating rod 1, and its detection wavelength is 425nm. The photomultiplier tube 4 and the optical filter 3 are coaxial and arranged in series on the backlight surface of the optical filter 3; the temperature controller 5 controls the ceramic electric heating by collecting the su...
Embodiment 2
[0023] Such as figure 1 Shown, a kind of method for quick detection of ethyl acetate on-line, described method comprises the following steps:
[0024] The ethyl acetate gas concentration is 10-1200mg / m 3 The gas sample flows through the surface coated with nano-GeO at a temperature of 275 °C at a flow rate of 250 mL / min. 2 The surface of the ceramic electric heating rod 1 produces chemiluminescence, detects the light wave signal with a wavelength of 425nm emitted by each gas sample, and then performs linear regression processing on the light wave signal intensity of the obtained gas sample and the concentration of ethyl acetate gas to obtain The linear equation of ethyl acetate gas concentration and light wave signal intensity; adopt the same method of detecting the light wave signal intensity of the gas sample in step 1 to detect the light wave signal intensity of the wavelength of 425nm emitted by the gas to be measured, and substitute the light wave signal intensity value ...
Embodiment 3
[0026] Such as figure 2 As shown, the surface temperature of the ceramic heating rod is controlled to 275 ° C, and then the concentration is 20 mg / m3 using an air pump at different flow rates in the range of 120-390 mL / min 3 The ethyl acetate gas was sent into the quartz glass tube, and finally the corresponding luminous intensity at different flow rates was recorded by a weak luminescence measuring instrument. The results are as follows figure 2 shown by figure 2 It can be seen that in the range of 120-250mL / min, the luminous intensity increases with the increase of the flow rate; in the range of 250-390mL / min, the luminous intensity decreases with the increase of the flow rate; and when the flow rate is 250mL / min, the luminous intensity Reached the maximum value, so it was selected as the optimum flow rate for the determination of ethyl acetate.
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