Automatic sample injection system for greenhouse gas
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An automatic sampling and greenhouse gas technology, which is applied to the analysis of materials and instruments, can solve the problems of heavy work intensity of testing personnel, poor repeatability of manual analysis, cumbersome air bag sampling, etc., to achieve high air tightness, save costs, reduce The effect of workload
Pending Publication Date: 2019-09-06
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology
The air bag sampling is cumbersome, the process is complicated, and a vacuum needs to be drawn before sampling, which is easy to cause cross-contamination during the sampling process
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[0036] Example 1
[0037] This embodiment specifically illustrates the system structure of the present invention.
[0038] Such as figure 1 The greenhouse gas sampling system shown includes a control device 1, a relay 2, an input device 3, a solenoid valve, a gas sampling device, a gas washing device, a quick-connect port 6, a multi-group cultivation device 5, and a power source 13; the control device 1 is a single-chip microcomputer, and the input device 3 is a touch digital display screen.
[0039] The relay 2 connects the control device 1 and the solenoid valve to control the opening and closing of the solenoid valve.
[0040] The input device 3 is connected to the control device 1 and is used to input custom parameters, including the sampling sequence, detection time, sampling period, and washing time of multiple groups of culture devices.
[0041] The gas sampling device includes an external detector 4, an inlet pipe 81, an outlet pipe 91, a first inlet solenoid valve 83 and a fir...
Example Embodiment
[0055] Example 2
[0056] In this embodiment, cyanobacteria mineralization is taken as an example to illustrate the method of using the device of embodiment 1 to carry out an automatic sample injection experiment. There are 4 groups of culture flasks in this experiment. Set the injection sequence of 1#, 2#, 3#, 4# culture flasks to 1, 2, 3, 4 on the input device (touch digital display screen), and the sampling interval ( The gas washing time is 1 min, the sampling detection time is 5 min, and the sampling frequency is 1 h / time. Specific parameter settings such as figure 2 Shown
[0057] The i-th path: refers to the sampling sequence, opening time, sampling detection time, and closing time parameter settings for the i-th inlet pipe;
[0058] Set delay start: it refers to the setting of the sampling start time in the i-th inlet pipe;
[0059] Set opening time: refers to the detection time of the i-th inlet pipe;
[0060] Set closing time: refers to the closing time of the i-th inlet p...
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Abstract
The invention relates to an automatic sample injection system for greenhouse gas. The system comprises a control device, a relay, an input device, a solenoid valve, a gas sample injection device, a gas washing device, a quick connection port, a plurality of groups of culture devices and a power source. The culture devices, the gas sample injection device, and an external detector are connected bymeans of non-detachable connection in multi-times sample injection detection of the whole process to keep the high airtightness of the culture devices in the multi-times sample injection detection process. With a water-proof and drying device, the dryness is ensured. Besides, a plurality of synchronous expansion ports are designed and electrical equipment is added based on the experimental requirements, so that the high scalability is realized; automatic sample injection is realized by controlling the multiple groups of culture devices in the lab and an NAND gate system protection program is employed to control a gas washing solenoid valve to prevent the blocking risk of the external detector, thereby realizing protection of the external detector; and the whole system is capable of realizing indoor culturing of the lab and in-situ batched real-time, accurate automatic greenhouse gas injection in the laboratory, so that the workload of the experiment staff is reduced substantially.
Description
technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to an automatic greenhouse gas sampling system. Background technique [0002] With the rapid development of modern greenhouse gas analysis instruments, there are various methods for greenhouse gas detection and sampling, such as direct syringe sampling, quantitative tube sampling, headspace sampling, thermal analysis sampling, purging, etc. Trapping and solid phase extraction have also made great progress. However, different sampling methods or methods have a significant impact on the analysis results. Studies have shown that automatic sampling has a high degree of automation and good continuity, and the correlation coefficient of the standard curve is more ideal than that of manual sampling. Therefore, automatic sampling Has been widely used in gas phase analysis. However, there is no in-situ gas-phase autosampler for greenhouse gas laboratory cultivation in this...
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