Vapor-liquid contact extraction method and device
A technology of gas-liquid contact and extraction method, which is applied in the direction of sampling device, measuring device, sampling, etc., can solve the problem of large distribution coefficient and achieve the effect of increasing the contact rate and improving the extraction efficiency
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Embodiment 1
[0127] Through the previous P&T method and using the figure 1 In the shown gas-liquid contact extraction method of the present invention comprising the gas-liquid contact extraction device of the present invention and the automatic liquid sample supply device, the sample water containing 2-MIB and Geosimin is analyzed. An experimental example of a comparison of the amount of species transferred to the gas phase between 2-MIB and Geosimin is shown.
[0128] [Table 2]
[0129]
[0130]
[0131] Table 2 is related to the conventional P&T method and the gas-liquid contact extraction method of the present invention, showing the theoretical mass transfer amount and respective extraction efficiency of 2-MIB and Geosimin moving from the liquid phase with a concentration of 5 ppt (5 pg / mL) to the gas phase. The amount of sample water in the conventional P&T method was 20ml. In the method of the present invention, the water was passed for 20 minutes at a flow rate of 2ml / min, so ...
Embodiment 2
[0162] For the gas-liquid contact extraction method of the present invention using the automatic liquid sample supply device of the present invention, the flow rate of the purge gas and the flow rate of the sample water were changed, and the extraction efficiencies of 2-MIB and Geosimin were compared. The extraction efficiency conditions of different 2-MIB and Geosimin based on purge gas flow rate and sample water flow rate are:
[0163] A: Sample water flow rate: 4ml / min, purge gas flow rate: 160ml / min, extraction time: 10 minutes
[0164] B: Sample water flow rate: 2ml / min, purge gas flow rate: 80ml / min, extraction time: 20 minutes
[0165] C: Sample water flow rate: 1ml / min, purge gas flow rate: 40ml / min, extraction time: 40 minutes,
[0166] The extraction temperature is 60°C. The result is expressed in image 3 . It was found that the condition for obtaining high extraction efficiency of both components is B in the figure.
[0167]
[0168] (1) Sample water extract...
Embodiment 3
[0194] for based on figure 1 The analysis reproducibility of 2-MIB and Geosimin of the system including the gas-liquid contact extraction device and the automatic liquid sample supply device of the present invention was tested. 2-MIB and Geosimin are known as musty odor-causing substances in tap water. However, according to the revision of the Tap Water Act in April 2005, a low standard value of 0.01 μg / L (10ppt) was set as a water quality standard item. An extremely low value of 0.001 μg / L (1 ppt), which is 1 / 10 thereof, is required as the lower limit of quantification. The olfactory threshold is described in the "Guidelines for Olfactometry" of the Ministry of the Environment.
[0195] Repeated reproducibility tests were performed at concentrations of 1 ppt for 2-MIB and Geosimin. The result is expressed in Figure 4 , Figure 5 , Figure 6 . In addition, the CV (%) of the peak area values of 2-MIB and Geosimin at the time of three measurements was calculated. Favor...
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