CN107702975A - A kind of pre-treating method of soil minor metallic element detection - Google Patents
A kind of pre-treating method of soil minor metallic element detection Download PDFInfo
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- CN107702975A CN107702975A CN201710802572.5A CN201710802572A CN107702975A CN 107702975 A CN107702975 A CN 107702975A CN 201710802572 A CN201710802572 A CN 201710802572A CN 107702975 A CN107702975 A CN 107702975A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
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Abstract
The present invention relates to Soil K+adsorption technical field, and in particular to a kind of pre-treating method of soil minor metallic element detection, comprises the following steps：It is added to after soil treatment in separating pipe, sequentially add nitric acid, hydrofluoric acid progressively clears up soil with perchloric acid solution, a kind of lower acid solution is added after a kind of separation of acid solution, separating pipe wherein used includes two vertical pipeline sections and horizontally disposed resolution pipeline section, two vertical pipeline sections include charging pipeline section and the drain pipe section being staggeredly arranged below charging pipeline section, the lower end of charging pipeline section connects with the upper end of drain pipe section through clearing up pipeline section, the internal diameter for clearing up pipeline section is gradually reduced from charging pipeline section to drain pipe section, so that resolution pipeline section interior edge equidirectional forms liquid storage reaction zone from deep to shallow.The present invention clears up soil substep, avoids the mixing of perchloric acid and nitric acid, improves resolution effect, separating pipe can efficiently separate acid solution, and can be directly added into a kind of lower acid solution after a kind of separation of acid solution, reduce the loss amount of solution.
Description
Technical field
The present invention relates to Soil K+adsorption technical field, and in particular to a kind of pre-treatment side of soil minor metallic element detection
Method.
Background technology
Due to the complexity of soil texture, the content that the content of soil is particularly wherein heavy metal element is detected, it is necessary to
Soil is cleared up.Currently used digestion procedure has three kinds of wet method, dry ashing method and micro-wave digestion.Wherein it is used as detection side
Wet in the standard GB/T 17141-1997 of method foundation is to weigh a small amount of sample to add nitric acid, and then adds hydrogen fluorine
Acid and perchloric acid.Nitric acid destroys the lattice structure of soil, makes to separate out embedded in heavy metal element therein, hydrofluoric acid destroys silica
Lattice structure, chemically react：SiO2(s) + 4 HF(aq) → SiF4(g) + 2 H2O (l), perchloric acid can be broken
Organic composition in bad soil, make the heavy metal element analysis in the agron of formation after being enriched in originally in animal and plant body
Go out.But in place of this method Shortcomings, i.e., nitric acid reacts with perchloric acid：HNO3+HClO4→NO2++H2O+ClO4-,
Wherein NO2+For nitro cation, i.e. nitric acid obtains proton in perchloric acid and shows alkalescence and soil is disappeared so as to reduce nitric acid
The effect of solution, and perchloric acid and the lower valency reaction of nitrogen oxides contained in nitric acid, can also reduce resolution of the perchloric acid to soil
Effect.
The content of the invention
Being sequentially added mixing in soil for nitric acid, hydrofluoric acid, perchloric acid in National Standard Method can occur nitric acid and perchloric acid
Reaction reduces the problem of resolution effect, and it is an object of the invention to provide a kind of pre-treatment side of soil minor metallic element detection
Method, nitric acid, hydrofluoric acid, perchloric acid are added in soil successively and progressively cleared up, avoids nitric acid from being mixed with perchloric acid, improve resolution
Effect.
The present invention provides following technical scheme：
A kind of pre-treating method of soil minor metallic element detection, comprises the following steps：
（1）Soil treatment：Sieving is ground after soil is dried, is then added in separating pipe, separating pipe is heated in a water bath；
（2）Nitric acid is cleared up：The salpeter solution that mass percent is 40wt%~45wt% is added into separating pipe and submerges soil, ultrasound
Auxiliary resolution to bubble-free, then by salpeter solution from separating pipe isolated primary first-order equation liquid；
（3）Hydrofluoric acid is cleared up：The hydrofluoric acid solution that mass percent is 37wt%~40wt% is continuously added into separating pipe to submerge
Soil, ultrasonic wave added clear up to bubble-free after by hydrofluoric acid from separating pipe isolated secondary response liquid；
（4）Perchloric acid is cleared up：The perchloric acid solution that mass percent is 70wt%~72wt% is continuously added into separating pipe to submerge
Soil, ultrasonic wave added clear up to bubble-free after by perchloric acid from separating pipe isolated third-order reaction liquid；
（5）It is prepared by constant volume：Primary first-order equation liquid, secondary response liquid, third-order reaction liquid are mixed to get digestion solution, heating concentration resolution
Liquid, then add water constant volume.
In the method for the present invention, salpeter solution is fed first into separating pipe and mixed with soil, in water-bath and ultrasonic bar
Soil is cleared up under part, waits salpeter solution after the completion of clearing up isolated primary first-order equation liquid, Ran Houzai from separating pipe
Sequentially add hydrofluoric acid, perchloric acid is progressively cleared up, finally primary first-order equation liquid, secondary response liquid are mixed with third-order reaction liquid
Obtain digestion solution.So nitric acid, hydrofluoric acid, perchloric acid are added in soil successively and progressively cleared up, and through separating pipe separation from
And the mixing of nitric acid and perchloric acid is avoided, improve resolution effect.
One kind as the inventive method is improved, and separating pipe includes two vertical pipeline sections and horizontally disposed resolution pipeline section, and two
Vertical pipeline section includes charging pipeline section and the drain pipe section being staggeredly arranged below charging pipeline section, the lower end for the pipeline section that feeds and drain pipe
Through clearing up pipeline section connection, the internal diameter for clearing up pipeline section is gradually reduced from charging pipeline section to the direction of drain pipe section for the upper end of section,
So that resolution inner tube segment forms liquid storage reaction zone from deep to shallow in same direction.Separating pipe includes charging pipeline section, goes out liquid
Pipeline section and resolution pipeline section, the internal diameter for clearing up pipeline section are gradually reduced to drain pipe section from charging pipeline section and form liquid storage reaction zone, this
Soil is entered in separating pipe and falls the liquid storage reaction zone in resolution pipeline section by sample from charging pipeline section, is then added to hydrofluoric acid
Resolution soil in liquid storage reaction zone, separating pipe is tilted into 10 °~30 ° to drain pipe section makes hydrofluoric acid slowly be flowed from liquid storage reaction zone
Separated into drain pipe Duan Bingcong separating pipes, then carry out the resolution of salpeter solution, perchloric acid solution successively with separating, both realized
Progressively clear up, reduce the solution loss in separation process or soil loss again, and separate can be direct after a kind of acid solution
A kind of acid solution resolution, without adding water to clean in soil, reduces the task of subsequent concentration under addition.
One kind as the inventive method is improved, clear up pipeline section cross section inner circle with the cylindrical center of circle in vertical direction
On deviate, make cross section in off-centre operation annular.The highest liquid level line of liquid storage reaction zone is set to be in the cylindrical center of circle of digestion tube
Top, the volume capacity of raising liquid storage reaction zone, and resolution pipeline section and the internal diameter that drain pipe section mutually picks out are big, flow liquid speed
It hurry up.
One kind as the inventive method is improved, and resolution pipeline section is being provided with filter membrane close to the junction of itself and drain pipe section
Plate, all sides of filter membrane plate and clears up the medial surface of pipeline section and fits, and the material of filter membrane plate is polytetrafluoroethylene (PTFE), the hole of filter membrane plate
Footpath is 20~50 μm.Prevent a small amount of soil from flowing out separating pipe with acid solution, improve detection accuracy degree.
One kind as the inventive method is improved, and drain pipe section is provided with stop valve, and the port of export of drain pipe section, which is provided with, leads
Stem bar.
Stop valve conveniently controls the solution in separating pipe, avoids maloperation from causing solution to flow out, and flow-guiding mouth can avoid it is molten
Drop is spilt when liquid stream goes out, and reduces wetted area of the solution to drain pipe section port.
One kind as the inventive method is improved, and the drying temperature of soil is 200~300 DEG C, and drying time 8~12 is small
When, it is 100~200 mesh to cross grit number.Accelerate digestion process, remove the impurity such as moisture.
One kind as the inventive method is improved, and bath temperature is 60~80 DEG C, and the power of ultrasonic wave is 45~60W, is surpassed
Sound time 10min.Accelerate digestion process, improve resolution efficiency.
One kind as the inventive method is improved, and the quality of the soil added in separating pipe is 0.5~0.75g, and nitric acid is molten
The volume of liquid is 4~6mL, and the volume of hydrofluoric acid solution is 2~3mL, and the volume of perchloric acid solution is 2~3mL.Select in right amount
Soil improves the speed of follow-up heating concentration with acid solution while realizing to Soil K+adsorption.
One kind as the inventive method is improved, step（5）Middle heating-up temperature is 150~200 DEG C, digestion solution after concentration
Volume is 1~2mL.Excessive acid solution is evaporated, facilitates subsequent instrumentation to detect.
Beneficial effects of the present invention are as follows：
The pre-treating method of the soil minor metallic element detection of the present invention first clears up soil substep, avoids perchloric acid and nitre
The mixing of acid, resolution effect is improved, while the separating pipe selected can be realized and efficiently separate acid solution, and a kind of acid solution is divided
A kind of lower acid solution can be directly added into from after to be cleared up, and reduced the loss amount of solution, improved operating efficiency.
Brief description of the drawings
Fig. 1 is the configuration diagram of the separating pipe of the inventive method.
Fig. 2 is the cross sectional view at A-A in Fig. 1.
In figure：1st, separating pipe, 11, charging pipeline section, 12, resolution pipeline section, 13, drain pipe section, 14, liquid storage reaction zone, 15, lead
Stem bar, 2, filter membrane plate, 3, stop valve, 4, highest liquid level line.
Embodiment
Just the embodiment of the present invention is described further below in conjunction with the accompanying drawings.
Unless otherwise instructed, the raw material employed in the present invention is commercially available or commonly used in the art, such as
Without special instruction, the method in following embodiments is the conventional method of this area.
Separating pipe used in the inventive method of embodiment 1
As shown in figure 1, the "the" shape that the separating pipe 1 of the present invention is placed in erectting, including two vertical pipeline sections and horizontally disposed
Pipeline section 12 is cleared up, two vertical pipeline sections include charging pipeline section 11 and the drain pipe section 13 being staggeredly arranged below charging pipeline section, charging
The upper end of the lower end of pipeline section and drain pipe section connect through clearing up pipeline section, clears up the internal diameter of pipeline section in the pipeline section that feeds to drain pipe section
Walk and be gradually reduced upwards so that form liquid storage reaction zone 14 in resolution pipeline section, the depth of liquid storage reaction zone prolong charging pipeline section to
The trend of drain pipe section is gradually from depth to shallow change.The material of separating pipe is the transparent organic resin of acid and alkali-resistance, such as poly- methyl
Methyl acrylate lucite.For ease of improve flow rate of liquid, as shown in Fig. 2 resolution pipeline section cross section inner circle with it is cylindrical
Center of circle in the vertical direction deviate, cross section and is so made the highest liquid level of liquid storage reaction zone in off-centre operation annular
Line 4 did not had the cylindrical center of circle of the cross section of resolution pipeline section, increased the capacity of liquid storage reaction zone.For convenience of separation acid solution and retain
Soil, resolution pipeline section are being provided with filter membrane plate 2, all sides and the resolution pipeline section of filter membrane plate close to the junction of itself and drain pipe section
Medial surface fits, and the material of filter membrane plate is polytetrafluoroethylene (PTFE), and the aperture of filter membrane plate is 20~50 μm.For convenience of condition acid solution,
Drain pipe section is provided with stop valve 3, and the port of export of drain pipe section is provided with flow-guiding mouth 15.
Need from separating pipe separate acid solution when, be first turned on stop valve, then separating pipe is tilted clockwise 10 °~
30 °, the acid solution in separating pipe is entered liquid storage pipeline section through filter membrane plate from liquid storage reaction zone, collection acid is moved down into flow-guiding mouth water conservancy diversion
In the vessel of liquid, the soil of liquid storage reaction zone then keeps in situ, and very small amount retains with the soil that acid solution flow through filter membrane plate, when dividing
Fallen back to after recovering vertical state from pipe on the side of liquid storage reaction zone, and the acid solution with being again added in separating pipe mixes,
The progressively resolution of nitric acid, hydrofluoric acid and perchloric acid to soil has been achieved in that, has avoided nitric acid from being mixed with perchloric acid and influences resolution
Effect, and can directly add down a kind of acid solution after separating a kind of acid solution, it is not necessary to soil is washed, that is, reduced molten
Liquid loses, and facilitates follow-up concentration again.
The implementation steps of the inventive method of embodiment 2
A kind of pre-treating method of soil minor metallic element detection, comprises the following steps：
（1）Soil treatment：Soil is ground after 200 DEG C of 12 hours drying times, then the screen cloth sieving through 100 mesh, took
Soil 0.5g after sieve adds the liquid storage reaction zone of resolution pipeline section from charging pipeline section, is then placed in separating pipe in 60 DEG C of water-bath
Heat 90min；
（2）Nitric acid is cleared up：The salpeter solution 4mL submergence soil that mass percent is 40wt% is added into separating pipe in a water bath
Earth, ultrasonic wave added are cleared up to bubble-free, and the power of ultrasonic wave is 45W, ultrasonic time 15min, then by separating pipe from water-bath
Salpeter solution is separated after taking-up and obtains primary first-order equation liquid；
（3）Hydrofluoric acid is cleared up：Separating pipe is placed in water-bath and adds the hydrofluoric acid solution 3mL that mass percent is 37wt% and is soaked
No soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 45W, ultrasonic time 15min, then by separating pipe from water
Separation hydrofluoric acid solution obtains secondary response liquid after being taken out in bath；
（4）Perchloric acid is cleared up：Separating pipe is placed in water-bath and adds the perchloric acid solution 2mL that mass percent is 70wt% and is soaked
No soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 45W, ultrasonic time 10min, then by perchloric acid from water
Separation perchloric acid solution obtains third-order reaction liquid after being taken out in bath；
（5）It is prepared by constant volume：Primary first-order equation liquid, secondary response liquid, third-order reaction liquid are mixed to get digestion solution, added at 150 DEG C
Heat concentration, adds water constant volume when the volume of digestion solution is 1mL.
The implementation steps of the inventive method of embodiment 3
A kind of pre-treating method of soil minor metallic element detection, comprises the following steps：
（1）Soil treatment：Soil is ground after 250 DEG C of 10 hours drying times, then the screen cloth sieving through 150 mesh, took
Soil 0.625g after sieve adds the liquid storage reaction zone of resolution pipeline section from charging pipeline section, then separating pipe is placed in 70 DEG C of water-bath
Middle heating 60min；
（2）Nitric acid is cleared up：The salpeter solution 5mL submergence soil that mass percent is 42wt% is added into separating pipe in a water bath
Earth, ultrasonic wave added are cleared up to bubble-free, and the power of ultrasonic wave is 55W, ultrasonic time 12min, then by separating pipe from water-bath
Salpeter solution is separated after taking-up and obtains primary first-order equation liquid；
（3）Hydrofluoric acid is cleared up：Separating pipe is placed in water-bath and adds the hydrofluoric acid solution 2.5mL that mass percent is 38wt%
Submerge soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 55W, ultrasonic time 12min, then by separating pipe from
Separation hydrofluoric acid solution obtains secondary response liquid after being taken out in water-bath；
（4）Perchloric acid is cleared up：Separating pipe is placed in water-bath and adds the perchloric acid solution 2.5mL that mass percent is 71wt%
Submerge soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 55W, ultrasonic time 12min, then by perchloric acid from
Separation perchloric acid solution obtains third-order reaction liquid after being taken out in water-bath；
（5）It is prepared by constant volume：Primary first-order equation liquid, secondary response liquid, third-order reaction liquid are mixed to get digestion solution, added at 180 DEG C
Heat concentration, adds water constant volume when the volume of digestion solution is 1.5mL.
The implementation steps of the inventive method of embodiment 4
A kind of pre-treating method of soil minor metallic element detection, comprises the following steps：
（1）Soil treatment：Soil is ground after 300 DEG C of 8 hours drying times, then the screen cloth sieving through 200 mesh, takes sieving
Soil 0.75g afterwards adds the liquid storage reaction zone of resolution pipeline section from charging pipeline section, is then placed in separating pipe in 80 DEG C of water-bath
Heat 30min；
（2）Nitric acid is cleared up：The salpeter solution 6mL submergence soil that mass percent is 45wt% is added into separating pipe in a water bath
Earth, ultrasonic wave added are cleared up to bubble-free, and the power of ultrasonic wave is 60W, ultrasonic time 10min, then by separating pipe from water-bath
Salpeter solution is separated after taking-up and obtains primary first-order equation liquid；
（3）Hydrofluoric acid is cleared up：Separating pipe is placed in water-bath and adds the hydrofluoric acid solution 3mL that mass percent is 40wt% and is soaked
No soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 60W, ultrasonic time 10min, then by separating pipe from water
Separation hydrofluoric acid solution obtains secondary response liquid after being taken out in bath；
（4）Perchloric acid is cleared up：Separating pipe is placed in water-bath and adds the perchloric acid solution 3mL that mass percent is 72wt% and is soaked
No soil, ultrasonic wave added is cleared up to bubble-free, and the power of ultrasonic wave is 60W, ultrasonic time 10min, then by perchloric acid from water
Separation perchloric acid solution obtains third-order reaction liquid after being taken out in bath；
（5）It is prepared by constant volume：Primary first-order equation liquid, secondary response liquid, third-order reaction liquid are mixed to get digestion solution, added at 200 DEG C
Heat concentration, adds water constant volume when the volume of digestion solution is 2mL.
Claims (9)
1. a kind of pre-treating method of soil minor metallic element detection, comprises the following steps：
（1）Soil treatment：Sieving is ground after soil is dried, is then added in separating pipe, separating pipe is heated in a water bath；
（2）Nitric acid is cleared up：The salpeter solution that mass percent is 40wt%~45wt% is added into separating pipe and submerges soil, ultrasound
Auxiliary resolution to bubble-free, then by salpeter solution from separating pipe isolated primary first-order equation liquid；
（3）Hydrofluoric acid is cleared up：The hydrofluoric acid solution that mass percent is 37wt%~40wt% is continuously added into separating pipe to submerge
Soil, ultrasonic wave added clear up to bubble-free after by hydrofluoric acid from separating pipe isolated secondary response liquid；
（4）Perchloric acid is cleared up：The perchloric acid solution that mass percent is 70wt%~72wt% is continuously added into separating pipe to submerge
Soil, ultrasonic wave added clear up to bubble-free after by perchloric acid from separating pipe isolated third-order reaction liquid；
（5）It is prepared by constant volume：Primary first-order equation liquid, secondary response liquid, third-order reaction liquid are mixed to get digestion solution, heating concentration resolution
Liquid, then add water constant volume.
2. the pre-treating method of soil minor metallic element detection according to claim 1, it is characterised in that separating pipe bag
Two vertical pipeline sections and horizontally disposed resolution pipeline section are included, two vertical pipeline sections include charging pipeline section and the cloth that staggers below charging pipeline section
The drain pipe section put, the lower end for the pipeline section that feeds and the upper end of drain pipe section connect through clearing up pipeline section, clear up the internal diameter of pipeline section from
Charging pipeline section is to being gradually reduced on the direction of drain pipe section, so that resolution inner tube segment is formed from deep to shallow in same direction
Liquid storage reaction zone.
3. the pre-treating method of soil minor metallic element detection according to claim 2, it is characterised in that resolution pipeline section
The inner circle of cross section deviated with cylindrical center of circle in the vertical direction, make cross section in off-centre operation annular.
4. the pre-treating method of soil minor metallic element detection according to claim 2, it is characterised in that resolution pipeline section
Filter membrane plate is being provided with close to the junction of itself and drain pipe section, all sides of filter membrane plate fit with clearing up the medial surface of pipeline section,
The material of filter membrane plate is polytetrafluoroethylene (PTFE), and the aperture of filter membrane plate is 20~50 μm.
5. the pre-treating method of the soil minor metallic element detection according to Claims 2 or 3 or 4, it is characterised in that go out
Liquid pipe section is provided with stop valve, and the port of export of drain pipe section is provided with flow-guiding mouth.
6. the pre-treating method of soil minor metallic element detection according to claim 1, it is characterised in that soil is done
Dry temperature is 200~300 DEG C, and 8~12 hours drying times, it is 100~200 mesh to cross grit number.
7. the pre-treating method of soil minor metallic element detection according to claim 1, it is characterised in that bath temperature
For 60~80 DEG C, the power of ultrasonic wave is 45~60W, 10~15min of ultrasonic time.
8. the pre-treating method of soil minor metallic element detection according to claim 1, it is characterised in that in separating pipe
The quality of the soil of addition is 0.5~0.75g, and the volume of salpeter solution is 4~6mL, and the volume of hydrofluoric acid solution is 2~3mL,
The volume of perchloric acid solution is 2~3mL.
9. the pre-treating method of soil minor metallic element detection according to claim 1, it is characterised in that step（5）
Middle heating-up temperature is 150~200 DEG C, and the volume of digestion solution is 1~2mL after concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710802572.5A CN107702975B (en) | 2017-09-07 | 2017-09-07 | Pretreatment method for detecting trace metal elements in soil |
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| CN201710802572.5A CN107702975B (en) | 2017-09-07 | 2017-09-07 | Pretreatment method for detecting trace metal elements in soil |
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| CN107702975B CN107702975B (en) | 2020-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507012A (en) * | 2018-12-25 | 2019-03-22 | 广电计量检测（湖南）有限公司 | The full potassium digestion procedure of total Phosphorus In Soil and detection method |
| CN111948007A (en) * | 2020-09-17 | 2020-11-17 | 中国环境监测总站 | Method for measuring various metal elements in soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101634617A (en) * | 2009-08-18 | 2010-01-27 | 广东省生态环境与土壤研究所 | Digestion method of soil metal elements |
| CN104931330A (en) * | 2015-06-11 | 2015-09-23 | 大连谱尼测试科技有限公司 | Digestion method of detection of heavy metals in soil |
| CN106092720A (en) * | 2016-08-19 | 2016-11-09 | 上海应用技术学院 | A kind of Soil K+adsorption measures the micro-wave digestion pre-treating method of total sodium potassium calcium content |
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- 2017-09-07 CN CN201710802572.5A patent/CN107702975B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634617A (en) * | 2009-08-18 | 2010-01-27 | 广东省生态环境与土壤研究所 | Digestion method of soil metal elements |
| CN104931330A (en) * | 2015-06-11 | 2015-09-23 | 大连谱尼测试科技有限公司 | Digestion method of detection of heavy metals in soil |
| CN106092720A (en) * | 2016-08-19 | 2016-11-09 | 上海应用技术学院 | A kind of Soil K+adsorption measures the micro-wave digestion pre-treating method of total sodium potassium calcium content |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507012A (en) * | 2018-12-25 | 2019-03-22 | 广电计量检测（湖南）有限公司 | The full potassium digestion procedure of total Phosphorus In Soil and detection method |
| CN111948007A (en) * | 2020-09-17 | 2020-11-17 | 中国环境监测总站 | Method for measuring various metal elements in soil |
| CN111948007B (en) * | 2020-09-17 | 2023-04-07 | 中国环境监测总站 | Method for measuring various metal elements in soil |
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| Publication number | Publication date |
|---|---|
| CN107702975B (en) | 2020-04-03 |
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