CN109358039B - Method for determining available phosphorus in soil - Google Patents
Method for determining available phosphorus in soil Download PDFInfo
- Publication number
- CN109358039B CN109358039B CN201811553436.8A CN201811553436A CN109358039B CN 109358039 B CN109358039 B CN 109358039B CN 201811553436 A CN201811553436 A CN 201811553436A CN 109358039 B CN109358039 B CN 109358039B
- Authority
- CN
- China
- Prior art keywords
- sample
- soil
- phosphorus
- solution
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
Abstract
The invention discloses a method for measuring available phosphorus in soil, which comprises the steps of firstly, carrying out differentiated treatment on acid soil and alkaline soil, respectively adding an extracting agent into the soil, exchanging available phosphorus ions in the soil, enabling the phosphorus ions of a solution to enter an atomization system of an inductively coupled plasma emission spectrometer in the form of aerosol, gasifying and ionizing target elements in a plasma torch, exciting and radiating characteristic spectral lines, and then calculating the content of the available phosphorus in the soil. The method has no special requirements on the properties and the composition of soil, and clay, sandy soil, loam and the like are all suitable for the method. The method effectively extracts the phosphorus element in the soil by using the leaching agent, quickly and accurately measures the concentration of the phosphorus element in the solution by using an inductively coupled plasma emission spectrometer, and further calculates the content of the available phosphorus in the soil.
Description
Technical Field
The invention relates to the technical field of chemical substance analysis and determination, in particular to a method for determining available phosphorus in soil.
Background
Since the 90 s of the 20 th century, the research field and the scientific development direction of international geology have changed tremendously, in which the ecological investigation of the earth has made a rapid and vigorous development. For the fundamental and commonality work, the requirement of development of the modern society cannot be met only by measuring the total amount of elements. Morphological analysis of the elements is therefore essential, in particular for their ecological biological activity, their migration and biological effectiveness, their morphological chemical and physical behavior, and it is necessary to state the effectiveness of the beneficial elements, their toxicity and their impact on the environment. Contemporary scientists have recognized the fact that the total concentration of an element is not sufficient to evaluate its toxicity, benefit and bioavailability, and sometimes even misunderstanding, and believe that the higher the total content of an element, the higher the bioavailability of the element. The available phosphorus in the soil is an existing form of phosphorus element in the soil, plays an important role in the growth process of plants, mainly comprises adsorbed phosphorus, water-soluble phosphorus, easily mineralized phosphorus and slightly soluble inorganic phosphorus, and the content of the available phosphorus in the soil is a main factor for determining whether the phosphate fertilizer has an effect or not, so that the determination of the available phosphorus has great guiding significance for agricultural production.
At present, the method for leaching the available phosphorus in the soil internationally mainly comprises an Olsen method, a Bray-kurtzl method, a Melich method, a Morgan method, a Vemontl method, a Vermont method, a distilled water leaching method, a calcium chloride solution leaching method, an iron chloride soaked filter paper method and a sodium hydroxide solution leaching method.
The method for leaching the available phosphorus in the soil has the following problems:
firstly, the Olsen method, the Bray-kurtzl method, the Melich method, the Morgan method, the Vemontl method and the Vermont method use many reagents which are imported abroad, have higher cost and are difficult to purchase at home, so the method is not beneficial to popularization and application in China;
secondly, the main defects of the distilled water extraction method are that the extraction efficiency is low, the extract is not clear, the interference is caused because the solution is not clear when the color comparison is carried out, the content of phosphorus in the extract is low, and the requirement on the detection limit of the sensitivity of the molybdenum blue color comparison method is high;
thirdly, the main disadvantage of the calcium chloride solution leaching method is that the application range is small, the leaching efficiency difference of the soil with different properties is large, although the calcium chloride solution has a good leaching effect on NH4Cl-P, Al-P and Fe-P are slightly touched, so that the method for measuring the effective phosphorus in the soil by adopting the calcium chloride solution leaching method cannot comprehensively reflect the accurate effective phosphorus content level of the soil;
fourthly, the sodium hydroxide solution leaching method mainly extracts Al-P and Fe-P, has little effect on Ca-P in various forms, and therefore, for soil samples with high content of calcium element, the method causes lower test results.
The measurement method for the leaching liquor mainly comprises the following steps: firstly, a phosphorus-molybdenum-vanadium yellow colorimetric method; secondly, the molybdenum-antimony anti-spectrophotometry has the detection limit of 10.0mg/kg, is high, has complicated operation process, and is easy to cause danger to operators by using strong corrosive solutions such as sulfuric acid, sodium hydroxide and the like in the experimental process.
In summary, the existing determination method for available phosphorus in soil has a great dependence on the singleness of soil, and no complete detection method suitable for the determination method for available phosphorus in most of soil exists, so that the research on the determination method for available phosphorus in soil suitable for most of soil properties is a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method for measuring available phosphorus in soil, which is applicable to detection of available phosphorus in various soil properties, simple and flexible in experimental operation process, low in cost and convenient for popularization and application in China.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for measuring available phosphorus in soil is characterized by comprising the following steps: distinguishing and treating acid soil and alkaline soil, namely, aiming at the acid soil, utilizing the capability of fluoride ions matched with iron ions and aluminum ions under an acid condition to ensure that relatively active phosphorus in the soil is activated and released successively, and measuring the phosphorus in a leaching solution by adopting an inductively coupled plasma emission spectrometry;
aiming at alkaline soil, calcium carbonate precipitation is formed by inhibiting the activity of calcium ions in a solution by using high alkalinity, the concentration of the calcium ions in the solution is rapidly reduced, calcium phosphate is dissolved, iron ions and aluminum ions in ferric aluminum salt combined with phosphorus are released, phosphorus with larger activity in the soil is similarly released under the hydrolysis action, and the phosphorus in the solution is also directly measured by adopting an inductively coupled plasma emission spectrometry;
after a sample is brought into an atomization system by carrier gas for atomization, the sample enters a plasma in an aerosol form, a target element is gasified, ionized and excited in a plasma torch and radiates a characteristic spectral line, and the intensity of the characteristic spectral line is in direct proportion to the concentration of the element within a certain concentration range; the specific measurement procedure is as follows,
1) preparing a leaching solution:
transferring 1.11 g of ammonium fluoride into 400 ml of water, adding 2.1 ml of hydrochloric acid, diluting with water to 1000ml, and storing in a plastic bottle for later use;
transferring 42.0 g of sodium bicarbonate to the leaching solution II, adding water to dissolve the sodium bicarbonate, adjusting the pH to 8.5 by using a sodium hydroxide solution, and diluting the sodium bicarbonate to 1000ml by using water for later use;
2) preparing a phosphorus standard stock solution with the concentration of rho being 1.00 mg/ml; weighing 4.2758 g of monopotassium phosphate dried at 105 ℃ for 2 hours, placing the monopotassium phosphate in a 250mL beaker, adding water to dissolve the monopotassium phosphate, transferring the monopotassium phosphate into a 1000mL volumetric flask, adding water to dilute the monopotassium phosphate to a scale, and shaking up the monopotassium phosphate to obtain a phosphorus standard stock solution with the concentration of 1.00 mg/mL;
3) preparing a sample: respectively preparing acid soil and alkaline soil, and removing foreign matters including branch rods, leaves and stones in a sample;
4) and (3) sample determination:
a. acid soil: weighing 5.0g of prepared sample, placing the sample in a 150mL plastic triangular flask, adding 50mL of first leaching solution, placing the sample in a constant temperature oscillator, oscillating for 30 minutes, filtering the mixture into a polyethylene plastic tube, and directly measuring the sample on an inductively coupled plasma emission spectrum after clarification, wherein the measuring wavelength is 228.1 nm;
b. alkaline soil: weighing 2.5g of prepared sample, placing the sample in a 150mL plastic triangular flask, adding 50mL of leaching solution II, placing the sample in a constant temperature oscillator, oscillating for 30 minutes, filtering the sample into a polyethylene plastic tube, and directly measuring the sample on an inductively coupled plasma emission spectrum after clarification, wherein the measuring wavelength is 228.1 nm;
c. the blank experiment is carried out while the sample is processed, 50ml of first leaching liquor is added, the mixture is placed into a constant temperature oscillator to be oscillated for 30 minutes, then the mixture is filtered into a polyethylene plastic tube, and the mixture is clarified and then is directly measured on an inductively coupled plasma emission spectrum, wherein the measuring wavelength is 228.1 nm;
5) preparing a calibration solution: respectively transferring two groups of phosphorus standard solutions of 0.0, 2.5, 5.0, 10.0, 20.0 and 30.0mL into a 100mL volumetric flask, diluting with the first leaching solution and the second leaching solution to a constant volume to scale, and mixing uniformly to obtain phosphorus standard series solutions of 0.0, 0.25, 0.5, 1, 2 and 3 mug/mL;
6) calculation results
Calculating the amount of the analyte in the sample according to the formula:
in the formula:
omega is the content of the effective state elements in the soil sample, and the unit is mg/kg;
rho is the mass concentration of the effective state element in the test sample which is obtained by checking a standard curve, and the unit is mg/L;
ρ0the mass concentration of the effective state elements in the blank sample of the laboratory is mg/L;
v is the volume of the added leaching liquor in ml when the sample is measured;
m is the mass of the sample after sieving, and the unit is g;
f is the dilution multiple of the sample;
Wdm-soil sample dry matter content.
In the step 1), the ammonium fluoride, the sodium bicarbonate, the sodium hydroxide and the hydrochloric acid are all superior pure, wherein the concentration of the hydrochloric acid is 1.19g/mL, and the concentration of the sodium hydroxide is 4 mol per liter.
According to the requirement of the national environmental protection industry standard HJ/T166, the collected sample is air-dried, coarsely ground and finely ground in a laboratory to a nylon sieve with the aperture of 10 meshes.
The inductively coupled plasma emission spectrometer is connected with a background correction emission spectrum computer control system, the RF power of the computer control system is 1.15kw, the pressure of an atomizer is 0.05MPa, the flow rate of carrier gas is 0.5L/min, the flow rate of cooling gas is 15L/min, the argon used is high-purity grade, and the mass fraction of the argon is more than or equal to 99.99%.
According to the method, after the acid-base property of soil is determined, leaching agents are respectively added into the soil to exchange effective phosphorus ions in the soil, the phosphorus ions in the solution enter an atomization system of an inductively coupled plasma emission spectrometer in the form of aerosol, target elements are gasified and ionized in a plasma torch to excite and radiate characteristic spectral lines, the concentration of the effective phosphorus in the solution is calculated according to the Lambert-beer law, and the content of the effective phosphorus in the soil is further calculated. The method has no special requirements on the properties and the composition of soil, and clay, sandy soil, loam and the like are all suitable for the method. The method effectively extracts the phosphorus element in the soil by using the extracting agent, quickly and accurately measures the concentration of the phosphorus element in the solution by using the powerful analysis and test capability of an inductively coupled plasma emission spectrometer, and further calculates the content of the available phosphorus in the soil.
Detailed Description
The following is further described in conjunction with the detailed description:
in the present embodiment, the first and second electrodes are,
1. preparation of reagents and materials:
unless otherwise stated, analytically pure reagents in accordance with the national standards and analytical laboratory water in accordance with GB/T6682 were used in the analysis.
1.1 ammonium fluoride: the top grade is pure;
1.2 hydrochloric acid: rho (HCl) is 1.19g/ml, and the product is of high-grade purity;
1.3 sodium bicarbonate: the top grade is pure;
1.4 sodium hydroxide: the top grade is pure;
1.5 leaching liquor I: weighing 1.11 g of ammonium fluoride (1.1), adding into 400 ml of water, adding 2.1 ml of hydrochloric acid (1.2), diluting to 1000ml with water, and storing in a plastic bottle;
1.6 leaching liquor II: weighing 42.0 g of sodium bicarbonate (1.3), adding water for dissolving, adjusting the pH to 8.5 by using a sodium hydroxide solution (the concentration is 4 mol/L), diluting to 1000ml by using water, and storing in a plastic bottle;
1.7 phosphorus standard stock solution: rho (phosphorus) ═ 1.00 mg/ml;
4.2758 g of monopotassium phosphate (standard substance) dried at 105 ℃ for 2 hours is weighed into a 250mL beaker, dissolved in water, transferred into a 1000mL volumetric flask, diluted to the scale by adding water and shaken uniformly, and rho (phosphorus) is 1.00 mg/mL.
1.8 phosphorus standard solution: rho (phosphorus) is 10 mu g/ml and is prepared in situ;
2. the main apparatus comprises:
2.1 nylon sieve: the aperture is 2.0mm (10 meshes);
2.2 analytical balance: the induction is 0.1 mg;
2.3 constant temperature oscillator (temperature point accurate control error 1 ℃);
2.4 inductively coupled plasma emission spectrometer:
(a) the computer control system with background correction emission spectrum, the working parameters of the inductively coupled plasma spectrometer are shown in table 1;
(b) argon gas: high purity grade (the mass fraction of argon is more than or equal to 99.99%).
3. Collecting and preparing a sample:
3.1 sample Collection and preservation
Soil samples were collected and stored as per the relevant regulations for HJ/T166. Contamination and loss of elements to be tested should be avoided during sample collection, transportation and storage.
3.2 determination of the Dry matter content
The determination of the dry matter content of the soil samples was performed according to HJ 613.
3.3 sample preparation
Foreign matters such as branches, leaves and stones in the sample are removed, and the collected sample is air-dried, coarsely ground and finely ground in a laboratory according to the requirement of HJ/T166 until the sample passes through a nylon sieve with the aperture of 2.0mm (10 meshes). The preparation of the sample should avoid contamination and loss of the elements to be tested.
4. And (3) analytical determination steps:
4.1 sample treatment
a. Acid soil: weighing 5.0g (accurate to 0.001g) of the prepared soil sample into a 150mL plastic triangular flask, adding 50mL of first leaching solution, placing into a constant temperature oscillator (2.3), oscillating for 30 minutes, filtering into a polyethylene plastic tube, clarifying, and directly measuring on an inductively coupled plasma emission spectrum, wherein the measuring wavelength is 228.1 nm;
b. alkaline soil: weighing 2.5g (accurate to 0.001g) of the prepared soil sample into a 150mL plastic triangular flask, adding 50mL of the second leaching solution, placing into a constant temperature oscillator (2.3), shaking for 30 minutes, filtering into a polyethylene plastic tube, clarifying, and directly measuring on an inductively coupled plasma emission spectrum, wherein the measuring wavelength is 228.1 nm.
4.2 blank experiment
The blank experiment was carried out simultaneously with the sample treatment, 50ml of the leach liquor was added, and the procedure was the same as 4.1 except that no sample was added.
4.3 drawing of Standard Curve
Respectively transferring 0.0ml, 2.5 ml, 5.0 ml, 10.0 ml, 20.0 ml and 30.0ml of the two groups of phosphorus standard solutions (1.8) into a volumetric flask of 100ml, diluting with the first leaching solution (1.5) and the second leaching solution (1.6) to constant volume to scale, and mixing uniformly. Thus obtaining the phosphorus standard series solution of 0.0, 0.25, 0.5, 1, 2 and 3 mu g/mL.
5. Calculation of results
Calculating the amount of the analyte in the sample according to the formula:
in the formula:
omega is the content of the effective state elements in the soil sample, and the unit is mg/kg;
rho is the mass concentration of the effective state element in the test sample which is obtained by checking a standard curve, and the unit is mg/L;
ρ0the mass concentration of the effective state elements in the blank sample of the laboratory is mg/L;
v is the volume of the added leaching liquor in ml when the sample is measured;
m is the mass of the sample after sieving, and the unit is g;
f is the dilution multiple of the sample;
Wdm-soil sample dry matter content.
6. Precision and accuracy
According to GB/T6392.2-2004, 5 standard substances with different mass fraction ranges are selected, and the method precision experiment is carried out by 5 laboratories according to the method. Each laboratory tested 5 times each horizontal sample and the raw data was statistically analyzed.
7. Quality control
7.1 each batch of samples is at least made into two laboratory blank samples, and the measurement results are all lower than the lower limit of measurement;
7.2 a standard curve is established in each analysis, and the correlation coefficient is more than or equal to 0.999;
7.3 for every 20 samples or batch (less than 20 samples/batch), a middle concentration point of the standard curve should be analyzed, and the relative deviation of the measured result and the actual concentration value should be less than or equal to 10%, otherwise, a reason should be searched or the standard curve should be rebuilt.
7.4 the parallel double-sample determination is carried out according to the proportion of at least 10 percent of each batch of samples, when the number of the samples is less than 10, at least one parallel double-sample is determined, and the relative deviation of the determination result of the parallel double-sample is less than or equal to 20 percent.
7.5 Each batch of samples was analyzed for at least 1 certified soil available state standard substance, and the measurement results should be within the uncertainty range given by the standard substance.
7.6 adopting a random sampling method to repeatedly analyze the samples, wherein the quantity of the samples is 20-30% of the quantity of each batch of samples; when the number of the samples is not more than 5, the number of the repeated analysis is 100 percent; a particular sample or a sample of higher quality requirements may be increased in the number of samples drawn up to 100% analysis as appropriate.
7.7 when the number of samples in each analysis batch is less than 10, 1-2 standard substance controls are inserted; when more than 10 standard substances are inserted, monitoring by 2-3 standard substances; the number of standard substance monitors can be increased as appropriate for a particular sample or a sample with higher quality requirements.
In addition, glassware used in the experiment needs to be soaked in a nitric acid solution for 24 hours, washed clean by tap water and experiment water in sequence, and then placed in a clean environment for airing. Soaking a newly used or suspected polluted container for more than 2 hours by using a hot hydrochloric acid solution (the temperature is higher than 80 ℃ and lower than the boiling temperature), soaking for more than 2 hours by using a hot nitric acid solution, sequentially washing by using tap water for experiments, and airing in a clean environment.
TABLE 1 operating parameters of inductively coupled plasma spectrometer
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (4)
1. A method for measuring available phosphorus in soil is characterized by comprising the following steps: distinguishing and treating acid soil and alkaline soil, namely, aiming at the acid soil, utilizing the capability of fluoride ions matched with iron ions and aluminum ions under an acid condition to ensure that relatively active phosphorus in the soil is activated and released successively, and measuring the phosphorus in a leaching solution by adopting an inductively coupled plasma emission spectrometry;
aiming at alkaline soil, calcium carbonate precipitation is formed by inhibiting the activity of calcium ions in a solution by using high alkalinity, the concentration of the calcium ions in the solution is rapidly reduced, calcium phosphate is dissolved, iron ions and aluminum ions in ferric aluminum salt combined with phosphorus are released, phosphorus with larger activity in the soil is similarly released under the hydrolysis action, and the phosphorus in the solution is also directly measured by adopting an inductively coupled plasma emission spectrometry;
after a sample is brought into an atomization system by carrier gas for atomization, the sample enters a plasma in an aerosol form, a target element is gasified, ionized and excited in a plasma torch and radiates a characteristic spectral line, and the intensity of the characteristic spectral line is in direct proportion to the concentration of the element within a certain concentration range; the specific measurement procedure is as follows,
1) preparing a leaching solution:
transferring 1.11 g of ammonium fluoride into 400 ml of water, adding 2.1 ml of hydrochloric acid, diluting with water to 1000ml, and storing in a plastic bottle for later use;
transferring 42.0 g of sodium bicarbonate to the leaching solution II, adding water to dissolve the sodium bicarbonate, adjusting the pH to 8.5 by using a sodium hydroxide solution, and diluting the sodium bicarbonate to 1000ml by using water for later use;
2) preparing a phosphorus standard stock solution with the concentration of rho being 1.00 mg/ml; weighing 4.2758 g of monopotassium phosphate dried at 105 ℃ for 2 hours, placing the monopotassium phosphate in a 250mL beaker, adding water to dissolve the monopotassium phosphate, transferring the monopotassium phosphate into a 1000mL volumetric flask, adding water to dilute the monopotassium phosphate to a scale, and shaking up the monopotassium phosphate to obtain a phosphorus standard stock solution with the concentration of 1.00 mg/mL;
3) preparing a sample: respectively preparing acid soil and alkaline soil, and removing foreign matters including branch rods, leaves and stones in a sample;
4) and (3) sample determination:
a. acid soil: weighing 5.0g of prepared sample, placing the sample in a 150mL plastic triangular flask, adding 50mL of first leaching solution, placing the sample in a constant temperature oscillator, oscillating for 30 minutes, filtering the mixture into a polyethylene plastic tube, and directly measuring the sample on an inductively coupled plasma emission spectrum after clarification, wherein the measuring wavelength is 228.1 nm;
b. alkaline soil: weighing 2.5g of prepared sample, placing the sample in a 150mL plastic triangular flask, adding 50mL of leaching solution II, placing the sample in a constant temperature oscillator, oscillating for 30 minutes, filtering the sample into a polyethylene plastic tube, and directly measuring the sample on an inductively coupled plasma emission spectrum after clarification, wherein the measuring wavelength is 228.1 nm;
c. the blank experiment is carried out while the sample is processed, 50ml of first leaching liquor is added, the mixture is placed into a constant temperature oscillator to be oscillated for 30 minutes, then the mixture is filtered into a polyethylene plastic tube, and the mixture is clarified and then is directly measured on an inductively coupled plasma emission spectrum, wherein the measuring wavelength is 228.1 nm;
5) preparing a calibration solution: respectively transferring two groups of phosphorus standard solutions of 0.0, 2.5, 5.0, 10.0, 20.0 and 30.0mL into a 100mL volumetric flask, diluting with the first leaching solution and the second leaching solution to a constant volume to scale, and mixing uniformly to obtain phosphorus standard series solutions of 0.0, 0.25, 0.5, 1, 2 and 3 mug/mL;
6) calculation results
Calculating the amount of the analyte in the sample according to the formula:
in the formula:
omega is the content of the effective state elements in the soil sample, and the unit is mg/kg;
rho is the mass concentration of the effective state element in the test sample which is obtained by checking a standard curve, and the unit is mg/L;
ρ0the mass concentration of the effective state elements in the blank sample of the laboratory is mg/L;
v is the volume of the added leaching liquor in ml when the sample is measured;
m is the mass of the sample after sieving, and the unit is g;
f is the dilution multiple of the sample;
Wdm-soil sample dry matter content.
2. The method for determining available phosphorus in soil according to claim 1, wherein: in the step 1), the ammonium fluoride, the sodium bicarbonate, the sodium hydroxide and the hydrochloric acid are all superior pure, wherein the concentration of the hydrochloric acid is 1.19g/mL, and the concentration of the sodium hydroxide is 4 mol per liter.
3. The method for determining available phosphorus in soil according to claim 1, wherein: the collected sample is air-dried, coarsely ground and finely ground in a laboratory until the sample is sieved by a nylon sieve with the aperture of 10 meshes.
4. The method for determining available phosphorus in soil according to claim 1, wherein: the inductively coupled plasma emission spectrometer is connected with a background correction emission spectrum computer control system, the RF power of the computer control system is 1.15kw, the pressure of an atomizer is 0.05MPa, the flow rate of carrier gas is 0.5L/min, the flow rate of cooling gas is 15L/min, the argon used is high-purity grade, and the mass fraction of the argon is more than or equal to 99.99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553436.8A CN109358039B (en) | 2018-12-19 | 2018-12-19 | Method for determining available phosphorus in soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553436.8A CN109358039B (en) | 2018-12-19 | 2018-12-19 | Method for determining available phosphorus in soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109358039A CN109358039A (en) | 2019-02-19 |
| CN109358039B true CN109358039B (en) | 2021-08-24 |
Family
ID=65329868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811553436.8A Active CN109358039B (en) | 2018-12-19 | 2018-12-19 | Method for determining available phosphorus in soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109358039B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261580A (en) * | 2019-07-09 | 2019-09-20 | 扬州大学 | Detection method of the soil to phosphorus absorption property |
| CN112147129A (en) * | 2020-09-18 | 2020-12-29 | 中国科学院南京土壤研究所 | Universal soil effective element extraction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290312A (en) * | 2016-07-25 | 2017-01-04 | 西南大学 | A kind of calcareous purple soil phosphorus element stage division |
| CN106770206A (en) * | 2017-03-15 | 2017-05-31 | 陕西省地质矿产实验研究所 | Method for measuring available phosphorus in alkaline soil by resin adsorption-assisted ICP-AES (inductively coupled plasma-atomic emission Spectrometry) method |
| CN108181300A (en) * | 2018-01-18 | 2018-06-19 | 北京市农林科学院 | The assay method of available phosphorus content in a kind of pedotheque |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8993958B2 (en) * | 2012-05-17 | 2015-03-31 | Micromass Uk Limited | Analyzing target analytes in a sample using mass spectroscopy |
-
2018
- 2018-12-19 CN CN201811553436.8A patent/CN109358039B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290312A (en) * | 2016-07-25 | 2017-01-04 | 西南大学 | A kind of calcareous purple soil phosphorus element stage division |
| CN106770206A (en) * | 2017-03-15 | 2017-05-31 | 陕西省地质矿产实验研究所 | Method for measuring available phosphorus in alkaline soil by resin adsorption-assisted ICP-AES (inductively coupled plasma-atomic emission Spectrometry) method |
| CN108181300A (en) * | 2018-01-18 | 2018-06-19 | 北京市农林科学院 | The assay method of available phosphorus content in a kind of pedotheque |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109358039A (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Motsara | Guide to laboratory establishment for plant nutrient analysis | |
| Wolf et al. | Recommended soil tests for macro and micronutrients | |
| CN109358039B (en) | Method for determining available phosphorus in soil | |
| Liu et al. | Characterizing the release of different composition of dissolved organic matter in soil under acid rain leaching using three-dimensional excitation–emission matrix spectroscopy | |
| CN103412034A (en) | Measuring method for quickly measuring contents of heavy metals in tobacco by using microwave digestion/ICP-MS method | |
| CN110031535A (en) | The method that sodium peroxide inductivity coupled plasma mass spectrometry measures tin amount in tin ore | |
| CN106770197B (en) | A kind of detection method of soil available lead | |
| CN109470687A (en) | The effective measuring method of silicon in a kind of soil | |
| CN104749120A (en) | Method for measuring content of arsenic in edible oil by utilizing super-microwave digestion graphite furnace atomic absorption spectrometry | |
| CN109163958A (en) | A kind of Methods of Soil Digestion and a kind of detection method for measuring various heavy in soil simultaneously | |
| Fu et al. | Determining available potassium in soil by laser-induced breakdown spectroscopy combined with cation exchange membrane adsorption | |
| CN110274882A (en) | Cadmium detrmination method in rice | |
| CN110568057A (en) | Method for simultaneously determining iodine content and bromine content in soil | |
| CN113109323A (en) | Method for determining main heavy metal elements in marine sediments | |
| CN110470768B (en) | Method for measuring residual amounts of pyrazosulfuron-ethyl, triazophos and butachlor in water | |
| CN108562571A (en) | The assay method of effective sulphur in soil | |
| CN109470689A (en) | The measuring method of slowly available potassium and available potassium in a kind of soil | |
| CN102042976A (en) | Method for measuring phosphorus and potassium content in fertilizer | |
| CN109470767A (en) | A kind of measuring method of Available Molybdenum in Soil | |
| CN109490403A (en) | A kind of measuring method of Available Boron In Soils | |
| Dasgupta et al. | Approaches in advanced soil elemental extractability: catapulting future soil–plant nutrition research | |
| Singh et al. | Recommended soil sulfate-S tests | |
| Liang et al. | Analysis of silicon in soil, plant and fertilizer | |
| CN112557560A (en) | Detection method for detecting selenate and selenite in soil by HPLC-ICP-MS | |
| CN109444115A (en) | The effective measuring method of sulphur in a kind of soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |