CN209167135U - The extraction element of hydrolyzable nitrogen in a kind of soil - Google Patents
The extraction element of hydrolyzable nitrogen in a kind of soil Download PDFInfo
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- CN209167135U CN209167135U CN201821870759.5U CN201821870759U CN209167135U CN 209167135 U CN209167135 U CN 209167135U CN 201821870759 U CN201821870759 U CN 201821870759U CN 209167135 U CN209167135 U CN 209167135U
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- reaction flask
- absorption bottle
- soil
- hydrolyzable nitrogen
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Abstract
The utility model discloses a kind of extraction element of hydrolyzable nitrogen in soil, belongs to machinery field.The device includes reaction flask, sealing cover is equipped at the top of reaction flask, reaction flask interior central is equipped with absorption bottle, and the top both ends that absorption bottle is fixed on reaction flask by connecting filament, reaction flask bottom is equipped with soil, reducing agent and lye, absorption bottle is provided with boric acid absorbing liquid, and liquid level of the absorption bottle apart from reaction flask bottom is 0.3 ~ 0.7cm.The utility model avoids lye and is mixed into absorbing liquid, ensure that the accuracy that hydrolyzable nitrogen measures in soil；It can be sealed rapidly after adding lye, reduce the loss of hydrolyzable nitrogen；Airtightness is more preferable, convenient for operation.
Description
Technical field
The utility model relates to a kind of extraction elements of hydrolyzable nitrogen in soil, belong to machinery field.
Background technique
Soil hydrolyzable nitrogen, is also available nitrogen, can reflect soil Nitrogen supplying situation at no distant date, including inorganic nitrogen (ammonium
State nitrogen, nitrate nitrogen) and facile hydrolysis organic nitrogen (amino acid, amide and facile hydrolysis protein).Principle is with base extraction soil
When earth, the organic nitrogen and ammonium nitrogen of facile hydrolysis are converted into ammonia, and nitrate nitrogen is then first converted into ammonium through ferrous sulfate.It is absorbed with boric acid
Ammonia, then with standard acidometric titration, calculate the content of hydrolyzable nitrogen.Soil available nitrogen amount and plant growth are in close relations, thus it
Meaning is bigger in rational application of fertilizers.
At present for hydrolyzable nitrogen in soil, mainly using " alkali in LY/T 1228-2015 " measurement of forest soil nitrogen "
Solution diffusion method " is measured.Hydrolyzable nitrogen is extracted using diffusion boat to be widely used, but exist and react-absorption integrated, it easily causes
Following problems: (1) sodium hydroxide solution cannot after being easily mixed into boric acid solution, and addition sodium hydroxide solution when mobile diffusion boat
It is sealed with frosted glass rapidly, loses hydrolyzable nitrogen；(2) it is unfavorable for observing color change when diluted acid titrates；(3) diffusion boat extracts
In the presence of cannot be completely secured airtightness, it is cumbersome the disadvantages of.
Summary of the invention
The utility model provides a kind of extraction element of hydrolyzable nitrogen in soil, avoids lye and is mixed into absorbing liquid, protects
The accuracy that hydrolyzable nitrogen measures in soil is demonstrate,proved.
The technical solution adopted in the utility model is:
The extraction element of hydrolyzable nitrogen in a kind of soil, including reaction flask, are equipped with sealing cover at the top of reaction flask, in reaction flask
Portion is equipped with absorption bottle between two parties, and absorption bottle is fixedly connected on the top both ends of reaction flask by filament, and reaction flask bottom is equipped with soil
Earth, reducing agent and lye, absorption bottle are provided with boric acid absorbing liquid, and liquid level of the absorption bottle apart from reaction flask bottom is 0.3 ~ 0.7cm.
In above-mentioned apparatus, the sealing cover has soft silica gel sealing ring, is equipped with hole, the hole soft rubber stopper in sealing cover end
It stoppers.
The absorption bottle refers to uncovered weighing bottle, and bottleneck has a circle groove, convenient for fastening filament.Connect the filament of absorption bottle
The other end rides over reaction bottleneck and is fixed with rubber band around bottleneck, while covering sealing cover, will ride over the filament pressure of bottleneck
Tightly between sealing cover and reaction bottleneck.
Extraction element provided by the utility model, the reaction flask are mainly used for the alkali soluble reaction of experiment pedotheque；
Sealing with holes is placed on above reaction flask, is used for sealing function；Hole on sealing cover is close to bottle cap edge, for into reaction flask
Inject sodium hydroxide solution；Soft rubber stopper is used for the hole that close encapsulation covers；Absorption bottle is hung in reaction flask with connection filament, is used
The ammonia volatilized in absorption alkali soluble soil.
The reaction flask and absorption bottle are cylindrical body vial, and reaction flask and absorption bottle internal diameter ratio are 2: 1, height ratio
It is 3: 1；Absorbent size can refer to the flat type weighing bottle of diameter 3cm, high 2cm.
It should ensure that soil reaction volume and absorbing liquid volume needed for sample, and make reaction flask and absorption bottle size reasonable
In range.
The sealing cover is PC plastic plate, and soft rubber stopper is silica gel plug, and soft rubber stopper is for closing cap bore, ring of the two at 40 DEG C
It never degenerates in border, is indeformable.
The filament is the nylon rope that will not adsorb or absorb gas, and the diameter of filament is 0.3 ~ 0.7cm.It is bearing to absorb
Thin as far as possible (0.5mm or so), length should be such that absorption bottle lower end is located above soil and lye in bottle weight range.
The measuring principle of the utility model: under 40 DEG C of environmental conditions, the soil in reaction flask is in reducing agent and sodium hydroxide
Under solution effects, keeping facile hydrolysis state nitrogen inverted is ammoniacal nitrogen, absorbs (24 hours) by boric acid solution in absorption bottle after diffusion.It takes
Absorption bottle standard acidometric titration absorbing liquid out, color is red by blue purpling, and reaches terminal, records quota of expenditure acid volume, calculates water
Solution property nitrogen content.Calculation formula are as follows:
In formula: X: hydrolyzable nitrogen content, mg/kg；
V: the volume of titration sample consumption acid, mL；
V0: the volume of titration blank consumption acids, mL；
C: the concentration of standard acid, mol/L；
M: the quality of pedotheque, g；
K: pedotheque moisture conversion coefficient；
14: the molal weight of nitrogen-atoms, mg/mmol.
The extraction element of hydrolyzable nitrogen in soil provided by the utility model, bring the utility model has the advantages that
(1) it avoids lye to be mixed into absorbing liquid, hydrolyzable nitrogen is caused to extract failure；
(2) it can be sealed rapidly after adding lye, reduce the loss of hydrolyzable nitrogen；
(3) facilitate absorbing liquid to titrate, convenient for the observation of color change, ensure that hydrolyzable nitrogen measures accurate in soil
Property.
(4) glue smearing is saved, airtightness is more preferable, convenient for operation.
The utility model is described further with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the top view of Fig. 1.
In figure: 1 is reaction flask, and 2 be sealing cover, and 3 be absorption bottle, and 4 be filament, and 5 be hole, and 6 be soft rubber stopper, and 7 be groove.
Specific embodiment
Embodiment:
As shown in Figure 1, in a kind of soil hydrolyzable nitrogen extraction element, including reaction flask 1 is equipped at the top of reaction flask 1 close
Capping 2,1 interior central of reaction flask is equipped with absorption bottle 3, and absorption bottle 3 is fixedly connected on the top two of reaction flask 1 by filament 4
End, 1 bottom of reaction flask are equipped with soil, reducing agent and lye, and absorption bottle 3 is provided with boric acid absorbing liquid, and absorption bottle 3 is apart from reaction flask
The liquid level of 1 bottom is 0.3 ~ 0.7cm.
In above-mentioned apparatus, the sealing cover 2 has soft silica gel sealing ring, is equipped with hole 5 in 2 end of sealing cover, the hole is with soft
Rubber plug 6 stoppers.
The absorption bottle 3 refers to uncovered weighing bottle, and bottleneck has a circle groove 7, convenient for fastening filament.Connect absorption bottle 3
The filament other end rides over reaction bottleneck and is fixed with rubber band around bottleneck, while covering sealing cover 2, will ride over the thin of bottleneck
Line 4 is pressed between sealing cover 2 and reaction bottleneck.
Extraction element provided by the utility model, the reaction flask are mainly used for the alkali soluble reaction of experiment pedotheque；
Sealing with holes is placed on above reaction flask, is used for sealing function；Hole on sealing cover is close to bottle cap edge, for into reaction flask
Inject sodium hydroxide solution；Soft rubber stopper is used for the hole that close encapsulation covers；Absorption bottle is hung in reaction flask with connection filament, is used
The ammonia volatilized in absorption alkali soluble soil.
The reaction flask 1 and absorption bottle 3 are cylindrical body vial, and reaction flask 1 and 3 internal diameter ratio of absorption bottle are 2: 1, high
Degree is than being 3: 1；3 size of absorption bottle can refer to the flat type weighing bottle of diameter 3cm, high 2cm.
It should ensure that soil reaction volume and absorbing liquid volume needed for sample, and make reaction flask and absorption bottle size reasonable
In range.
The sealing cover 2 is PC plastic plate, and soft rubber stopper 6 is silica gel plug, and soft rubber stopper is for closing cap bore, and the two is at 40 DEG C
It never degenerates in environment, is indeformable.
The filament 4 is the nylon rope that will not adsorb or absorb gas, and the diameter of filament is 0.3 ~ 0.7cm.It is bearing to inhale
(0.5mm or so) thin as far as possible in bottle weight range is received, length should be such that absorption bottle lower end is located above soil and lye.
Specific operating method are as follows:
1, the soil weighed up and reducing agent mixing are laid in reaction flask bottom；
2, absorption bottle is suspended in reaction flask with connection filament, and bottom of bottle is about 1cm from soil, and connection filament upper end is fixed on
Bottleneck is reacted, boric acid absorbing liquid is added in absorption bottle, sealing cover is covered while being pressed on the connection filament of reaction bottleneck；
3, it (will be careful not in the hole injection reaction flask on the reacted bottle cap of sodium hydroxide solution with syringe or liquid-transfering gun
Instill absorption bottle), the hole on bottle cap is sealed with soft rubber stopper rapidly.
4, it gently puts down and shakes reaction flask, be put into constant incubator after being sufficiently mixed sodium hydroxide solution and soil, in 40
DEG C heat preservation 24 hours.Mild-natured rolling reaction flask 3 times of period interval.
5, after extracting, with standard acidometric titration absorbing liquid, color is red by blue purpling, and reaches terminal, according to sample and sky
The volume of white quota of expenditure acid calculates the content of hydrolyzable nitrogen.Calculation formula are as follows:
In formula: X: hydrolyzable nitrogen content, mg/kg；
V: the volume of titration sample consumption acid, mL；
V0: the volume of titration blank consumption acids, mL；
C: the concentration of standard acid, mol/L；
M: the quality of pedotheque, g；
K: pedotheque moisture conversion coefficient；
14: the molal weight of nitrogen-atoms, mg/mmol.
Claims (7)
1. the extraction element of hydrolyzable nitrogen in a kind of soil, including reaction flask, it is characterised in that: be equipped at the top of the reaction flask close
Capping, reaction flask interior central is equipped with absorption bottle, and absorption bottle is fixedly connected on the top both ends of reaction flask by filament, reaction
Bottom of bottle portion is equipped with soil, reducing agent and lye, and absorption bottle is provided with boric acid absorbing liquid, liquid level of the absorption bottle apart from reaction flask bottom
For 0.3 ~ 0.7cm.
2. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: the sealing cover is with soft
Silica gel sealing ring is equipped with hole in sealing cover end, which is stoppered with soft rubber stopper.
3. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: the absorption bottle is uncovered
Weighing bottle, bottleneck have a circle groove, and filament is passed through from the groove；The filament other end rides over reaction bottleneck, with rubber band around bottle
Mouth is fixed.
4. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: the reaction flask and absorption
Bottle is cylindrical body vial, and reaction flask and absorption bottle internal diameter ratio are 2: 1, highly than being 3: 1.
5. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: the sealing cover is PC modeling
Flitch, soft rubber stopper are silica gel plugs, and the two never degenerates in 40 DEG C of environment, is indeformable.
6. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: the filament is that will not inhale
Nylon rope that is attached or absorbing gas, the diameter of filament are 0.3 ~ 0.7cm.
7. the extraction element of hydrolyzable nitrogen in soil according to claim 1, it is characterised in that: absorption bottle size is diameter
The flat type weighing bottle of 3cm, high 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821870759.5U CN209167135U (en) | 2018-11-14 | 2018-11-14 | The extraction element of hydrolyzable nitrogen in a kind of soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821870759.5U CN209167135U (en) | 2018-11-14 | 2018-11-14 | The extraction element of hydrolyzable nitrogen in a kind of soil |
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| CN209167135U true CN209167135U (en) | 2019-07-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414431A (en) * | 2022-01-26 | 2022-04-29 | 中国科学院亚热带农业生态研究所 | Distillation and absorption method and distillation and absorption device for soil ammonium nitrogen |
| CN114878281A (en) * | 2022-06-13 | 2022-08-09 | 山东大学 | Integrated device for generating and collecting dimethyl mercury and application method thereof |
| CN118150556A (en) * | 2024-05-09 | 2024-06-07 | 中国地质调查局昆明自然资源综合调查中心 | Method for measuring mineralized carbon content in soil |
-
2018
- 2018-11-14 CN CN201821870759.5U patent/CN209167135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414431A (en) * | 2022-01-26 | 2022-04-29 | 中国科学院亚热带农业生态研究所 | Distillation and absorption method and distillation and absorption device for soil ammonium nitrogen |
| CN114878281A (en) * | 2022-06-13 | 2022-08-09 | 山东大学 | Integrated device for generating and collecting dimethyl mercury and application method thereof |
| CN118150556A (en) * | 2024-05-09 | 2024-06-07 | 中国地质调查局昆明自然资源综合调查中心 | Method for measuring mineralized carbon content in soil |
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