CN201331512Y

CN201331512Y - Testing device for measuring total discharge amount of N2O gas in oil

Info

Publication number: CN201331512Y
Application number: CNU2008202377479U
Authority: CN
Inventors: 王小治; 封克; 尹微琴; 盛海君; 钱晓晴
Original assignee: Yangzhou University
Current assignee: Lanzhou University; Yangzhou University
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-10-21
Anticipated expiration: 2018-12-31

Abstract

The utility model relates to a testing device for measuring the total discharge amount of N2O gas in soil. In the testing device, a glass tube is inserted into a rubber plug which is used for sealing a culture flask; the glass tube is sleeved by a hose; and a silica gel pad is plugged in the hose and communicated with an injector. The testing device is technically characterized in that a pyxis filled with hydrogen peroxide is hung in the culture flask. The utility model solves the problem that the total discharge amount of N2O is difficult to obtain due to insufficient O2 in the prior art, utilizes the hydrogen peroxide filled in the pyxis to ensure sufficient supply of O2 in an airtight culture condition, can accurately and quantificationally measure the total discharge amount of N2O through measuring the concentration change of N2O in the airtight culture condition for a longer time, and can directly and quantificationally measure the total discharge amount of N2O in soil in an aerophil condition within a longer period of time. In addition, the hydrogen peroxide is filled in the pyxis without contacting with the soil in the culture flask, thus avoiding influence to correlative process of the soil.

Description

N in the measured soil 2The test unit of O gaseous emission total amount

Technical field

The utility model relates to research fields such as soil course, soil gas discharging, particularly N in the measured soil ₂The test unit of O gaseous emission total amount.

Background technology

Before the present utility model, N in the research soil nitrification process ₂Distributing of O is one of current focus, research soil nitrification process N in the laboratory ₂The O discharging is generally carried out in culture flask, because the soil nitrification process need consume O ₂, therefore under airtight culture condition, can cause O ₂Deficiency, for preventing O ₂Shortage, existing normal aerobic culture, the method for airtight sampling of short time during sampling of adopting.This method can accurately be studied soil N ₂The drainage rate of O, but at research soil N ₂Can only adopt the N of different time sections during the O total emission volumn ₂The drainage rate of O is estimated, is difficult to obtain N accurately ₂O total emission volumn, thereby the reliability of influence research.

Summary of the invention

The purpose of this utility model will overcome above-mentioned defective exactly, N in design, a kind of measured soil of development ₂The test unit of O gaseous emission total amount.

The technical solution of the utility model is:

N in the measured soil ₂The test unit of O gaseous emission total amount, glass tube insert in the rubber plug, the airtight culture flask of rubber plug, flexible pipe entangles glass tube, fills in silicagel pad in flexible pipe, and silicagel pad is communicated with syringe, its major technique is characterised in that and hangs bottle in culture flask, hydrogen peroxide is arranged in the bottle.

Advantage of the present utility model and effect are to guarantee O under the airtight condition ₂Sufficient supplies, can be by under the airtight cultivation of long period, measuring N ₂The variation of O concentration and accurately measure N quantitatively ₂The O total emission volumn promptly owing to added hydrogen peroxide in bottle, has guaranteed O under the airtight condition of culture ₂Sufficient supplies, hydrogen peroxide is placed in the bottle of suspension simultaneously, it is not contacted with soil in the bottle, thereby can not impact the soil correlated process, but and direct quantitative be determined in the long period section soil N under the aerobic conditions ₂The O total emission volumn.

Description of drawings

Fig. 1---the utility model structural principle synoptic diagram.

Embodiment

Technical conceive of the present utility model is: add a kind of O of release in culture flask ₂Material, guaranteed O in the airtight incubation ₂Sufficient supplies, satisfy simultaneously the demand of gas collecting in confined conditions.

As shown in Figure 1:

With the triangular flask is culture flask 1, glass tube 4 is inserted in boring on the rubber plug 5, and rubber plug 5 airtight culture flasks 1 entangle glass tube 4 to seal and to guarantee airtight condition with (heavy wall) flexible pipe 3, in flexible pipe 3, fill in silicagel pad 2, to satisfy the requirement that syringe is gathered gas in the triangular flask 1 more than 7 time; Hang bottle 6 in culture flask 1, bottle 6 contains hydrogen peroxide, to guarantee O in the culture flask 1 ₂Sufficient supplies.

Use the concrete grammar of this device as follows:

1. will set certain soil of water cut and put into culture flask 1, extract eudiometry N in the bottle ₂Gas concentrations such as O, as cultivating initial concentration, the bottle 6 that hydrogen peroxide will be housed with fine rule hangs in the culture flask 1, does not contact with soil, adds a cover the rubber plug 5 (comprising rubber plug 5, glass tube 4, flexible pipe 3, silicagel pad 2) that has assembled;

2. wait to reach when being scheduled to incubation time, insert in the silicagel pad 2, extract gas in the culture flask 1, in order to measure N with syringe 7 ₂Gas concentrations such as O according to the variation of concentration before and after cultivating, and can obtain corresponding accurately gaseous emission total amount in conjunction with culture flask 1 inner volume.

The utility model is easy to use, between 10 days culture periods, extracts, measures O in the culture flask 1 ₂The result of content shows that the utility model can guarantee culture flask 1 O under airtight condition of culture fully ₂Sufficient supplies, be as the criterion and determine that the soil gas total emission volumn provides assurance under the quantity research aerobic conditions.

Claims

1. N in the measured soil ₂The test unit of O gaseous emission total amount, glass tube insert in the rubber plug, the airtight culture flask of rubber plug, and flexible pipe entangles glass tube, fills in silicagel pad in flexible pipe, and silicagel pad is communicated with syringe, it is characterized in that hanging bottle in culture flask, and hydrogen peroxide is arranged in the bottle.