JPH068525Y2 - Plant gas analyzer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for analyzing a gas component such as ethylene released during a plant development process or carbon dioxide that increases or decreases due to respiration of a plant.

(Prior art) In the process of growth and maturation of plants, ethylene, which is a growth hormone and a maturation hormone, is released and absorbs carbon dioxide gas in the process of photosynthesis. An effective means is to measure the occurrence over time.

Usually, for this purpose, seeds and fruits are housed in a container that can be sealed, and the atmospheric gas here is conducted to a gas chromatograph for analysis, but it is necessary to collect the target component at a high concentration. If the sample is stored in a small product, it will impose an unnatural posture on the plant during the growth process after germination, making the secretion of growth hormone and the like unnatural and storing it in a large container in anticipation of the growth process. However, there is a problem that the target component is diluted to cause a measurement error.

(Purpose) The present invention has been made in view of such a problem, and an object thereof is to provide a plant-generated gas analyzer capable of adjusting the space of a sample container according to the growth process of plants. To do.

(Summary of the Invention) That is, the feature of the present invention is that a bag body that expands and contracts by a fluid is housed in a container that can be sealed by a lid body, a sample mounting table is provided at the upper end of the bag body, and the bag body By supplying the fluid and introducing the gas in the container to the gas chromatograph, the effective space volume of the container communicating with the analyzer can be adjusted according to the growth process of the plant.

(Embodiment) Therefore, the details of the present invention will be described below based on an illustrated embodiment.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 is a sample container characterized by the present invention, and an upper portion 2 is a transparent container which can be airtightly held by a lid. A retractable and airtight bag 3 whose lower end is fixed to the bottom of the container is accommodated, and a sample mounting table 4 is disposed on the upper end of the bag 3. The bag 3 is provided with an inflow port 4 and an exhaust port 5 so that a fluid such as air or water as a heat medium can be circulated by a pump 6 while adjusting the temperature of the temperature controller 13 to a constant temperature. .

On the other hand, an inflow port 7 and a discharge port 8 are provided in the upper part of the container 1, and are connected to a 6-way switching valve 9 via a suction pump 15.
A measuring pipe 10 for sampling and a gas chromatograph 12 are connected to the valve 9, and are connected so as to transfer the gas to be analyzed in the measuring pipe 10 to the gas chromatograph 12 by the carrier gas from the carrier gas source 11. . Reference numeral 14 in the figure indicates a valve for supply and discharge.

In this embodiment, a dish S for rehydration and seeds are put in a Petri dish S and housed in the container 1. In this state, pump 6
To supply a fluid having a temperature suitable for seed growth to the bag 3 to keep the inside of the container 1 warm and to secure an upper space for seeds to grow.
Inflate (FIG. 2I). In this state, the 6-way switching valve 9
Is switched to the state shown by the dotted line in the figure, and the gas suction pump 13 is operated to circulate the atmospheric gas in the container 1 through the measuring pipe 10. In this state, the 6-way switching valve 9 is switched to the state shown by the solid line in the figure. As a result, a fixed amount of atmospheric gas is collected in the measuring pipe 10, and the gas chromatograph 12 is carried by the carrier gas.
Then, the target component can be detected. For example, when rapeseed seeds were housed and the ethylene concentration in the atmosphere was measured at regular intervals, a change in ethylene concentration in the ppb order could be detected as shown in FIG.

In this way, if the observation is continued, the shoots grow and the height becomes high. In this state, the amount of water supplied to the bag 3 is once reduced and contracted, the upper end of the bag is lowered to a position where a space commensurate with the height can be secured, and fluid is supplied in the process of maintaining this state (II). As a result, the growth gas is captured in the space of the minimum source that does not hinder the growth of the plant to be observed, and unnecessary dilution is prevented.

In this embodiment, the volume is adjusted by the amount of fluid supplied into the bag, but by providing the members 20, 20, 20 for adjusting the upper limit position of the bag as shown in FIG. Enables more reliable analysis.

(Effect) As described above, in the present invention, the bag body that expands and contracts by the fluid having the temperature suitable for the growth of plants is housed in the container that can be sealed by the lid body, and the upper surface of the bag body is used as a sample. In addition to being a mounting table, an inlet and an outlet are formed in the container, the inlet and outlet are closed by a switching valve, the state is connected to the sampling pipe for sampling, and the carrier is attached to one end of the sampling pipe for sampling. Since the gas source and one of the states in which the gas chromatograph is connected to the other end are selected, the space adjustment function and the temperature adjustment function can be realized with a simple configuration in a small container. Instead, it is possible to introduce a certain amount of the components released into the space from the plant into the gas chromatograph simply by operating the switching valve without unnecessarily diluting the components.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an operation of the apparatus, FIG. 3 is a diagram showing an example of a measurement result by the apparatus, and FIG. FIG. 4 is a sectional view showing another embodiment of the present invention. 1 ... Container, 2 ... Lid 3 ... Bag, 4 ... Sample mounting table

Claims (1)

[Scope of utility model registration request] 1. A container which can be sealed by a lid, accommodates a bag body that expands and contracts by a fluid having a temperature suitable for growing plants, and uses the upper surface of the bag body as a sample mounting table.
An inlet and an outlet are formed in the container, the inlet and the outlet are closed by a switching valve, a state in which the outlet is in communication with a sampling pipe for sampling, and a carrier gas source at one end of the sampling pipe for sampling, Further, the plant-generated gas analysis device is configured to select one of the states in which the gas chromatograph is connected to the other end.