CN107941987A - The assay method of full nitrogen in a kind of soil - Google Patents
The assay method of full nitrogen in a kind of soil Download PDFInfo
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- CN107941987A CN107941987A CN201711179465.8A CN201711179465A CN107941987A CN 107941987 A CN107941987 A CN 107941987A CN 201711179465 A CN201711179465 A CN 201711179465A CN 107941987 A CN107941987 A CN 107941987A
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- soil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention provides a kind of assay method of full nitrogen in soil, it is characterised in that comprises the following steps：Step 1, pedotheque are directly taken digesting and are digested up after preparing；Step 2, the sample digested is cooled down, and 30 to 40 milliliters of distilled water is added after cooling in digest tube；Step 3, the digest tube for having added distilled water is placed on azotometer and is distilled, and notices that digest tube and black glue head are close；Step 4, adds alkali 89 seconds or so, until sample heats blackening；Step 5, adds 40 milliliters of boric acid, and distillation is set 56 minutes, and distillation terminates.Compared with prior art, the present invention is easy to operate, reliable, can not only quickly and easily reach sample measurement effect, enormously simplify operating process, and measurement result is reliable.
Description
Technical field
The present invention relates to Soil K+adsorption service technology field, it is related to a kind of assay method of full nitrogen in soil.
Background technology
The determination step soil sample of existing method, which disappears, boils（Containing nitrate nitrogen and nitrite nitrogen）Process be that soil sample is sent into drying
50ml Kelvin bottom of bottle portion, add 1ml liquor potassic permanganates, shake Kelvin bottle, be slowly added into sulfuric acid, constantly rotate Kelvin bottle, so
After place 5min, add 1 drop octanol, 0.5g reduced iron powders be put into by Kelvin bottom of bottle portion by long neck funnel, it is small on bottle lid
Funnel, rotates Kelvin bottle, iron powder is contacted with acid, when vigorous reaction stops（About 5min）, after Kelvin bottle is cooled down, pass through length
Neck funnel adds 2g accelerators and the 5ml concentrated sulfuric acids, shakes up, and Kelvin bottle is favoured on 300W alternating temperature electric furnaces, is heated with small fire, treats bottle
When interior reaction relaxes（About 10-15min）, strengthen the firepower native liquid boiled that makes to disappear and keep slightly boiling, the position of heating is no more than in bottle
Liquid level, it is excessive and thermally decomposed ammonium salt to prevent bottle wall temperature, cause nitrogen to disappear, the temperature boiled that disappears is with sulfuric acid vapor in bottleneck
Condensing reflux is advisable at top 1/3, after boil liquid is disappeared and grogs is all changed into greyish white slightly band green, is further continued for disappearing and boils 1h, disappear and boil
Finish, cool down, it is to be distilled.Distillation process：It is fully transferred to the boil liquid that disappears is quantitative in cucurbit, in 150ml conical flasks, adds
Enter 5ml2% boric acid-indicator mixed liquor, be placed on condensation pipe end, be passed through steam distillation.Therefore, the survey of existing method
Determine the resolution of step soil sample and distillation process is cumbersome, it is complicated.
The assay method of full nitrogen is easy to operate, reliable in a kind of soil, can not only quickly and easily reach sample measurement effect
Fruit, enormously simplify operating process, and measurement result is reliable.
The content of the invention
Technical problem solved by the invention the full nitrogen in a kind of soil is provided assay method, with existing measuring method
The resolution of middle determination step soil sample and distillation process are cumbersome, it is complicated the problem of.
In order to solve the above technical problems, in a kind of soil of the present invention full nitrogen assay method, it is characterised in that including following
Step：Step 1, pedotheque are directly taken digesting and are digested up after preparing：200 degrees/min of heating rate, rises to 200
Degree, soaking time 2 minutes；Second stage heating rate 180 degree/minute, rises to 350 degree, soaking time is 3 minutes；3rd rank
Section heating rate is all 180 degree/minute, rises to 420 degree, soaking time is 90 minutes；Temperature is finally arranged to 415 to 420 degree,
Phase III is arranged to 90 minutes, sets 4 stages altogether, until as clear as crystal green or blue to digest；Step 2, will
The sample cooling digested, adds 30 to 40 milliliters of distilled water in digest tube after cooling；Step 3, will add disappearing for distilled water
Change pipe, which is placed on azotometer, to be distilled, and notices that digest tube and black glue head are close；Step 4, adds alkali 8-9 seconds or so, until sample heats
Blackening；Step 5, adds 40 milliliters of boric acid, and distillation is set 5-6 minutes, and distillation terminates；Step 6：By the sample distilled and blank
With the titration with hydrochloric acid of 0.1004mol/L.（Note：Developed the color with the mixing for dripping 5-6 drops before azotometer distillation into empty conical flask
Agent）
Compared with prior art, the assay method of full nitrogen is easy to operate, reliable in a kind of soil of the present invention, can not only be quick and convenient
Ground reaches sample measurement effect, enormously simplify operating process, and measurement result is reliable.
Brief description of the drawings
Fig. 1 be it is of the present invention be the assay method of full nitrogen in a kind of soil flow chart.
Embodiment
In present pre-ferred embodiments, the present invention provides a kind of assay method of full nitrogen in soil, it is characterised in that bag
Include following steps：It please participate in shown in Fig. 1, step 1, pedotheque is directly taken digesting and digested up after preparing：Heating rate
200 degrees/min, 200 degree are risen to, soaking time 2 minutes；Second stage heating rate 180 degree/minute, rises to 350 degree, insulation
Time is 3 minutes；Phase III heating rate is all 180 degree/minute, rises to 420 degree, soaking time is 90 minutes；Temperature is most
415 to 420 degree are arranged to eventually, and the phase III is arranged to 90 minutes, sets 4 stages altogether, until as clear as crystal green or blue
Color is to digest；Step 2, the sample digested is cooled down, and 30 to 40 milliliters of distilled water is added after cooling in digest tube；Step
Rapid three, the digest tube for having added distilled water is placed on azotometer and is distilled, notices that digest tube and black glue head are close；Step 4, adds alkali
8-9 seconds or so, until sample heats blackening；Step 5, adds 40 milliliters of boric acid, and distillation is set 5-6 minutes, and distillation terminates；Step
Six：By the titration with hydrochloric acid of the sample distilled and blank 0.1004mol/L..
In conclusion the assay method of full nitrogen is easy to operate, reliable in a kind of soil of the present invention, can not only be quickly and easily
Reach sample measurement effect, enormously simplify operating process, and measurement result is reliable.
The above, is only highly preferred embodiment of the present invention, not makees limitation in any form to the present invention, appoints
What those skilled in the art, without departing from the scope of the technical proposal of the invention, using in the method for the disclosure above
Appearance makes technical solution of the present invention many possible changes and modifications, is all within the protection scope of the claims..
Claims (1)
1. the assay method of full nitrogen in a kind of soil, it is characterised in that comprise the following steps：Step 1, after pedotheque prepares
Digesting is directly taken to digest up：Temperature is finally arranged to 415 to 420 degree, and the phase III is arranged to 90 minutes, sets 4 altogether
A stage, until as clear as crystal green or blue to digest；Step 2, the sample digested is cooled down, and 30 are added after cooling
To 40 milliliters of distilled water in digest tube；Step 3, the digest tube for having added distilled water is placed on azotometer and is distilled, and pays attention to disappearing
It is close with black glue head to change pipe；Step 4, adds alkali 8-9 seconds or so, until sample heats blackening；Step 5, adds 40 milliliters of boric acid, steams
Setting 5-6 minutes is evaporated, distillation terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711179465.8A CN107941987A (en) | 2017-11-23 | 2017-11-23 | The assay method of full nitrogen in a kind of soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711179465.8A CN107941987A (en) | 2017-11-23 | 2017-11-23 | The assay method of full nitrogen in a kind of soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107941987A true CN107941987A (en) | 2018-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711179465.8A Pending CN107941987A (en) | 2017-11-23 | 2017-11-23 | The assay method of full nitrogen in a kind of soil |
Country Status (1)
| Country | Link |
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| CN (1) | CN107941987A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796054A (en) * | 2020-07-08 | 2020-10-20 | 内蒙古草原红牛生物科技有限公司 | Method for detecting protein of staged accurate temperature control dairy product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128835A (en) * | 2010-11-30 | 2011-07-20 | 上海交通大学 | AA3 type flow injection analyzer-based method for measuring total nitrogen content of soil |
| CN104330326A (en) * | 2014-10-28 | 2015-02-04 | 南京白云化工环境监测有限公司 | Measuring method of nitrogen content in soil |
| CN104991036A (en) * | 2015-08-03 | 2015-10-21 | 河南广电计量检测有限公司 | Determination method for soil alkali-hydrolyzable nitrogen |
-
2017
- 2017-11-23 CN CN201711179465.8A patent/CN107941987A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128835A (en) * | 2010-11-30 | 2011-07-20 | 上海交通大学 | AA3 type flow injection analyzer-based method for measuring total nitrogen content of soil |
| CN104330326A (en) * | 2014-10-28 | 2015-02-04 | 南京白云化工环境监测有限公司 | Measuring method of nitrogen content in soil |
| CN104991036A (en) * | 2015-08-03 | 2015-10-21 | 河南广电计量检测有限公司 | Determination method for soil alkali-hydrolyzable nitrogen |
Non-Patent Citations (3)
| Title |
|---|
| 丘星初等: "土壤全氮的快速测定", 《干旱环境监测》 * |
| 王琳: "凯氏法测定土壤全氮的方法改进", 《环境监控与预警》 * |
| 黎冬容等: "全自动凯氏定氮仪测定土壤全氮含量", 《南方国土资源》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796054A (en) * | 2020-07-08 | 2020-10-20 | 内蒙古草原红牛生物科技有限公司 | Method for detecting protein of staged accurate temperature control dairy product |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |