N15/14 isotopic abundance sample collection method and apparatus for determining plant discharging N2O
A technology of isotope abundance and sample collection, which is applied in the direction of measuring devices, sampling devices, instruments, etc., can solve the problems of small emissions, inability to measure samples with stable isotope ratio mass spectrometers, and inability to determine the δ value of plant sources, etc.
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Embodiment 1
[0022] Including a part 1 with variable shape and volume during the pumping process and a gas collector 2, the plant to be tested 3 is accommodated in the airtight part 1; a gas sampling port 3 is opened on the part 1, and the gas collector 2 passes the gas The sampling port 3 is in sealing connection with the component 1 . The component 1 is provided with a sealing port 4, through which the plant 3 to be measured is accommodated in the component 1, and the sealing port 4 is sealed in the state of gas collection. The part 1 can be a transparent plastic bag or a polytetrafluoroethylene bag. The gas collector 2 can be a needle tube.
[0023] The present invention selects soybean as research object, measures the N of soybean discharge in soybean growing season. 2 δ of O 15 N value.
[0024] Measuring Plant Emissions 15 / 14 N 2 The method of O isotope abundance: in the growing season of soybeans, collect fresh samples of soybean plants respectively as plant samples to be meas...
Embodiment 2
[0030] The difference from Example 1 is:
[0031] The component 1 can be a polytetrafluoroethylene bag; the gas collector 2 can be a gas collection bag. Said use does not contain N 2 O The artificial air is replaced 4-5 times through the sample collection port opened on the measuring device.
[0032] which does not contain N 2 O artificial air is: use high-purity oxygen, nitrogen and CO 2 The volume percentage of gas preparation is oxygen (25%), nitrogen (74%), carbon dioxide (330ppm) without N 2 O's artificial air.
Embodiment 3
[0034] The difference from Example 1 is:
[0035] Said use does not contain N 2 O The artificial air is replaced 6 times through the sample collection port opened on the measuring device. which does not contain N 2 O artificial air is: use high-purity oxygen, nitrogen and CO 2 Gas preparation volume percentage is oxygen (15%), nitrogen (84%) carbon dioxide (390ppm) without N 2 O's artificial air.
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