CN112924615A - Method for measuring volatile carbon content of arbor - Google Patents
Method for measuring volatile carbon content of arbor Download PDFInfo
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- CN112924615A CN112924615A CN202110105296.3A CN202110105296A CN112924615A CN 112924615 A CN112924615 A CN 112924615A CN 202110105296 A CN202110105296 A CN 202110105296A CN 112924615 A CN112924615 A CN 112924615A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 64
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 238000004108 freeze drying Methods 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 13
- 239000003566 sealing material Substances 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 7
- 210000000481 breast Anatomy 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 238000009777 vacuum freeze-drying Methods 0.000 claims description 5
- 240000007263 Pinus koraiensis Species 0.000 abstract description 8
- 235000011615 Pinus koraiensis Nutrition 0.000 abstract description 8
- 238000007710 freezing Methods 0.000 abstract description 6
- 230000008014 freezing Effects 0.000 abstract description 6
- 240000006055 Dacrydium cupressinum Species 0.000 description 5
- 235000018782 Dacrydium cupressinum Nutrition 0.000 description 5
- 235000013697 Pinus resinosa Nutrition 0.000 description 5
- 241000894007 species Species 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 244000058281 Ulmus pumila Species 0.000 description 2
- 235000001547 Ulmus pumila Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 241000694401 Acer maximowiczianum Species 0.000 description 1
- 241000219240 Acer pictum subsp. mono Species 0.000 description 1
- 244000274847 Betula papyrifera Species 0.000 description 1
- 235000009113 Betula papyrifera Nutrition 0.000 description 1
- 235000009109 Betula pendula Nutrition 0.000 description 1
- 235000010928 Betula populifolia Nutrition 0.000 description 1
- 235000002992 Betula pubescens Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000565391 Fraxinus mandshurica Species 0.000 description 1
- 244000264601 Juglans mandschurica Species 0.000 description 1
- 235000014075 Juglans mandschurica Nutrition 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001480055 Quercus mongolica Species 0.000 description 1
- 240000006661 Serenoa repens Species 0.000 description 1
- 235000005318 Serenoa repens Nutrition 0.000 description 1
- 244000046101 Sophora japonica Species 0.000 description 1
- 235000010586 Sophora japonica Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000793823 Tilia amurensis Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001543 one-way ANOVA Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a method for measuring the volatile carbon content of an arbor, which comprises the following steps: (1) collecting a sample; (2) sample pretreatment; (3) drying the sample; (4) grinding a sample: grinding the dried sample; (5) volatile carbon content determination: placing 2-3mg of ground sample in a high-purity oxygen environment with the purity of 99.99% for combustion, and detecting CO released in the combustion process2Amount, volatile carbon content was calculated. Compared with the traditional drying and natural drying, the drying step of freezing and drying after drying can reduce the loss of volatile carbon in the Korean pine, provides a basis for accurately measuring the carbon content, is easy to operate, and accurately measures the carbon content, thereby improving the prediction accuracy of the forest carbon reserves.
Description
Technical Field
The invention belongs to the technical field of forest carbon reserves, and particularly relates to a method for measuring the volatile carbon content of arbors.
Background
The accurate determination of the carbon content of the trees is very important for accurately estimating the carbon reserves of the forests, the carbon content of 0.5 or 0.45 is widely used as a conversion coefficient in the estimation of the carbon reserves, experiments show that the carbon content of different trees has obvious difference in recent years, the carbon content of each tree has a change range of 47% -59%, and the carbon storage changes along with the aging of the forests, which is probably because wood contains a plurality of small molecular organic matters such as alcohols, aldehydes, ketones, phenols, furan, terpenes, isoprenoids and the like, and the small molecular substances can volatilize at high temperature, so a certain carbon loss can be caused in the process of drying samples at high temperature.
In the middle of the 90 s of the last century, scholars at home and abroad begin to carry out deep research on vegetation carbon-containing rate and obtain certain results. At present, the determination of the organic carbon content of plants mostly adopts a dry burning method. Lamlom et al performed carbon content determination on 41 tree species in North America in 2003, and applied two treatment methods of natural drying and drying to the sample, respectively, and found that there was a significant difference in the carbon content determined in the two treatment methods, and the carbon content obtained by drying was lower than that obtained by natural drying. Martin et al also found that there was a significant difference in carbon content measured under the freeze-drying and oven-drying treatments, which suggests the presence of volatile carbon. Thomas et al freeze-dried and oven-dried the test material separately and calculated the volatile and non-volatile carbon content from the difference between the average carbon values of the freeze-dried and oven-dried samples.
At present, in many studies, the carbon content of 0.5 is used as a conversion coefficient to evaluate the carbon reserves of forests, and volatile carbon and internal and external factors such as tree species, places, ages and the like are not considered. Carbon contents of different tree species or the same tree species are different, and neglecting the difference causes great errors on estimation of the carbon reserves of the forest ecosystem.
Therefore, the development of a method for measuring the carbon content of the Korean pine, which can reduce the loss of volatile carbon of the arbor, accurately measure the carbon content and improve the prediction accuracy of the forest carbon reserves, is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method for determining the volatile carbon content of arbor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for measuring the volatile carbon content of an arbor comprises the following steps:
(1) collecting samples: in summer, sampling the arbor with the diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment: polishing the sample core until the annual ring limit is clear, measuring the annual ring of the sample core, then utilizing COFECHA software to inspect the sequence of the sample core, determining the year of the sample core, and stripping the first five-year ring of the sample core;
(3) drying a sample: carrying out vacuum freeze drying on the stripped sample, then sealing the sample by using a sealing material, taking out the sample from the sealing material after the sample is cooled to room temperature, and then putting the sample into an oven for drying;
(4) grinding a sample: grinding the dried sample;
(5) volatile carbon content determination: placing 2-3mg of ground sample in a high-purity oxygen environment with the purity of 99.99% for combustion, and detecting CO released in the combustion process2Amount, volatile carbon content was calculated.
Further, in the step (3), the freeze-drying temperature is-60 ℃, the freeze-drying time is 41h, and the freeze-drying pressure is 6.0-7.0 pa.
Further, in the step (3), the drying temperature is 85 ℃ and the drying time is 28 hours.
Further, in the step (3), the sealing material is a sealing film.
Further, in the step (4), the polishing is performed to a polishing size of 150-.
The beneficial effects of the further technical scheme are that: the loss of volatile carbon in the arbor is reduced, the carbon content of the arbor is accurately measured, and a basis is provided for evaluating the forest carbon reserve.
Further, the arbor species is any one of Korean pine, Juglans mandshurica, Manchurian ash, Tilia amurensis, white birch, Acer nikoense Maxim, Acer mono Maxim, Quercus mongolica, Ulmus pumila, and Sophora japonica.
The invention also provides application of the method for determining the volatile carbon content of the arbor in evaluating forest carbon reserves.
The invention has the beneficial effects that: compared with the traditional drying and natural drying, the drying step of freezing and drying after drying can reduce the loss of volatile carbon in the Korean pine, provides a basis for accurately measuring the carbon content, is easy to operate, and accurately measures the carbon content, thereby improving the prediction accuracy of the forest carbon reserves.
Drawings
FIG. 1 is a graph showing the change in the drying treatment quality of a first sample;
FIG. 2 is a graph showing the change in the quality of the second sample after freeze-drying;
FIG. 3 is a graph showing the mass change of a third sample after freeze-drying and then drying;
FIG. 4 is a graph showing the mass change of the fourth sample after drying and freeze-drying.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Example 1
The method for measuring the volatile carbon content of the Korean pine comprises the following steps:
(1) collecting samples: in summer, sampling the arbor with the diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment: polishing the sample core until the annual ring limit is clear, measuring the annual ring of the sample core, then utilizing COFECHA software to inspect the sequence of the sample core, determining the year of the sample core, and stripping the first five-year ring of the sample core;
(3) drying a sample: carrying out vacuum freeze drying on the stripped sample, wherein the freeze drying temperature is-60 ℃, the freeze drying time is 41 hours, and the freeze drying pressure is 6.0pa, then sealing by using a sealing film, taking out the sample from the sealing material after the sample is cooled to room temperature, and then putting the sample into an oven for drying, wherein the drying temperature is 85 ℃, and the drying time is 28 hours;
(4) grinding a sample: grinding the dried sample to 150 meshes;
(5) volatile carbon content determination: placing 2-3mg of ground sample in high purity oxygen environment with purity of 99.99% for combustion, and detecting released in combustion processCO2Amount, volatile carbon content was calculated.
Example 2
The method for determining volatile carbon content of the sabal pine comprises the following steps:
(1) collecting samples: in summer, sampling the arbor with the diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment: polishing the sample core until the annual ring limit is clear, measuring the annual ring of the sample core, then utilizing COFECHA software to inspect the sequence of the sample core, determining the year of the sample core, and stripping the first five-year ring of the sample core;
(3) drying a sample: carrying out vacuum freeze drying on the stripped sample, wherein the freeze drying temperature is-60 ℃, the freeze drying time is 41 hours, and the freeze drying pressure is 6.5pa, then sealing by using a sealing film, taking out the sample from the sealing material after the sample is cooled to room temperature, and then putting the sample into an oven for drying, wherein the drying temperature is 85 ℃, and the drying time is 28 hours;
(4) grinding a sample: grinding the dried sample to 200 meshes;
(5) volatile carbon content determination: placing 2-3mg of ground sample in a high-purity oxygen environment with the purity of 99.99% for combustion, and detecting CO released in the combustion process2Amount, volatile carbon content was calculated.
Example 3
The method for measuring the volatile carbon content of the ulmus pumila comprises the following steps:
(1) collecting samples: in summer, sampling the arbor with the diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment: polishing the sample core until the annual ring limit is clear, measuring the annual ring of the sample core, then utilizing COFECHA software to inspect the sequence of the sample core, determining the year of the sample core, and stripping the first five-year ring of the sample core;
(3) drying a sample: carrying out vacuum freeze drying on the stripped sample, wherein the freeze drying temperature is-60 ℃, the freeze drying time is 41 hours, and the freeze drying pressure is 7.0pa, then sealing by using a sealing film, taking out the sample from the sealing material after the sample is cooled to room temperature, and then putting the sample into an oven for drying, wherein the drying temperature is 85 ℃, and the drying time is 28 hours;
(4) grinding a sample: grinding the dried sample to 250 meshes;
(5) volatile carbon content determination: placing 2-3mg of ground sample in a high-purity oxygen environment with the purity of 99.99% for combustion, and detecting CO released in the combustion process2Amount, volatile carbon content was calculated.
Comparative experiment
The method for determining the volatile carbon content of the Korean pine comprises the following steps:
(1) collecting samples:
in summer, sampling Korean pine with diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment:
grinding the sample core by using sand paper until the limit of a growth ring is clear, performing cross dating on the sample core by using a tree ring width measuring instrument, then inspecting a sample core sequence by using COFECHA software, determining the year of the sample core, and stripping the previous five-year-round of the sample core;
(3) drying a sample:
dividing the stripped sample into 4 parts;
drying: putting the 1 st sample into an envelope, drying the envelope in an oven at the drying temperature of 85 ℃ for 25 hours, taking the sample out of the oven, putting the sample into a drying oven, cooling the sample to room temperature, weighing the mass of the envelope by using a one-ten-thousandth balance, continuously putting the envelope into the oven, drying the envelope, taking the sample out every time the envelope is dried, weighing the sample, stopping drying the envelope after the mass is stable, and accumulating the drying time for 41 hours;
② freeze drying: placing the 2 nd sample in a vacuum freeze dryer for freeze drying at the temperature of-60 ℃ under the freeze drying pressure of 6.0pa, taking out the sample after freeze drying for a period of time, weighing the sample by using a one-ten-thousandth balance, stopping freeze drying after the quality is stable, and placing the sample in a drying box by using a sealing film after the sample is subjected to accumulative freeze drying for 41 hours;
thirdly, freeze drying and then drying: and (3) placing the 3 rd sample in a vacuum freeze dryer for freeze drying at the temperature of minus 60 ℃ under the freeze drying pressure of 6.0pa, taking out the sample after freeze drying for a period of time, weighing the sample by using a one-ten-thousandth balance, stopping freezing after the quality is stable, accumulating the freezing for 41 hours, sealing the sample by using a sealing film, cooling the sample to room temperature, placing the sample in an oven for drying at the drying temperature of 85 ℃ for 28 hours.
Fourthly, drying firstly and then freeze drying: and putting the 4 th sample into an envelope, drying in an oven at the drying temperature of 85 ℃ for 41 hours, taking out the sample from the oven, putting the sample into a drying oven, cooling to room temperature, putting the sample into a vacuum freeze dryer, freeze-drying at the freeze-drying temperature of-60 ℃ under the freeze-drying pressure of 6.0pa, taking out the sample every time of drying, weighing, stopping freeze-drying after the quality is stable, and accumulating the freeze-drying for 25 hours.
(4) Grinding a sample:
respectively placing 4 dried samples into 2ml centrifuge tubes, adding 2-3 steel balls with the diameter of 4mm into the centrifuge tubes, grinding to 250 meshes by using a grinder, and respectively filling into 4 envelopes;
(5) and (3) carbon content determination:
selecting 2-3mg of samples from each sample, containing the samples in tin capsules, putting the samples into a combustion furnace for combustion, fully combusting the samples in the combustion furnace at 1200 ℃ in a high-purity oxygen environment with the purity of 99.99%, and analyzing CO released in the combustion process by using a PE2400SERIES II analyzer2And (3) calculating the volatile carbon content and the carbon content in the samples, wherein the measurement time of each sample is 5min, and the measurement data are automatically recorded by a computer in the whole measurement process.
At least three samples are weighed per envelope and if the standard deviation of carbon content is greater than 0.3, the test is repeated 1 time. After Excel processing, the carbon content difference of the Korean pine under different treatments is compared by adopting One-way ANOVA, and P is 0.05 as a threshold value for the significance test of the difference.
TABLE 1 variation of mass loss, carbon content, volatility in terms of carbon ratio in different drying modes
| Sample (I) | Mass loss rate (%) | Carbon content (%) | Volatile carbon content (%) |
| Sample No. 1 | 2.62 | 48.17 | 3.67 |
| 2 nd sample | 3.22 | 47.15 | 1.59 |
| Sample No. 3 | 3.17 | 46.63 | 0.49 |
| 4 th sample | 3.21 | 46.40 | 0.00 |
As shown in table 1 and fig. 1-4, the carbon content of the sample core of the red pine is the lowest when the red pine is dried only, which indicates that the freeze-drying mode can retain a certain volatile carbon in the red pine, the carbon content of the sample core is the highest when the sample core is dried first and then frozen, and compared with the 4 drying modes, it can be found that the mass loss rate is inversely proportional to the carbon content and the volatile carbon content, and the volatile carbon loss rate is higher when the mass loss rate is higher, but the mass of the sample core of the red pine is increased in the freezing process in the first drying and then freeze-drying method, which is because the water absorption in the later drying process of the sample core of the red pine can cause the inaccuracy of the carbon content determination, so the optimal drying mode in the experiment is selected from the 3 drying modes of freeze-drying, dry-drying, first freezing and then drying.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (6)
1. A method for measuring the volatile carbon content of an arbor is characterized by comprising the following steps:
(1) collecting samples: in summer, sampling the arbor with the diameter at breast height of more than or equal to 5cm to obtain a sample core;
(2) sample pretreatment: polishing the sample core until the annual ring limit is clear, measuring the annual ring of the sample core, then utilizing COFECHA software to inspect the sequence of the sample core, determining the year of the sample core, and stripping the first five-year ring of the sample core;
(3) drying a sample: carrying out vacuum freeze drying on the stripped sample, then sealing the sample by using a sealing material, taking out the sample from the sealing material after the sample is cooled to room temperature, and then putting the sample into an oven for drying;
(4) grinding a sample: grinding the dried sample;
(5) volatile carbon content determination: placing 2-3mg of ground sample in a high-purity oxygen environment with the purity of 99.99% for combustion, and detecting CO released in the combustion process2Amount, volatile carbon content was calculated.
2. The method for determining the volatile carbon content in the arbor as claimed in claim 1, wherein in step (3), the freeze-drying temperature is-60 ℃, the freeze-drying time is 41h, and the freeze-drying pressure is 6.0-7.0 pa.
3. The method for measuring the volatile carbon content of the arbor as claimed in claim 1, wherein in the step (3), the drying temperature is 85 ℃ and the drying time is 28 hours.
4. The method for determining the volatile carbon content of the arbor as recited in claim 1, wherein in the step (3), the sealing material is a sealing film.
5. The method for determining the volatile carbon content in arbor as claimed in claim 1, wherein in step (4), the grinding is performed to 150-250 mesh.
6. Use of the method of any one of claims 1 to 5 for determining the volatile carbon content of trees for the assessment of forest carbon reserves.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011052975A (en) * | 2009-08-31 | 2011-03-17 | Shimadzu Corp | Total organic carbon measuring instrument |
| CN102621294A (en) * | 2012-04-09 | 2012-08-01 | 东北林业大学 | Method for measuring carbon content in wood |
| US20140114627A1 (en) * | 2012-08-28 | 2014-04-24 | Saudi Arabian Oil Company | Method for reconstructing the total organic carbon content from compositional modeling analysis |
-
2021
- 2021-01-26 CN CN202110105296.3A patent/CN112924615A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011052975A (en) * | 2009-08-31 | 2011-03-17 | Shimadzu Corp | Total organic carbon measuring instrument |
| CN102621294A (en) * | 2012-04-09 | 2012-08-01 | 东北林业大学 | Method for measuring carbon content in wood |
| US20140114627A1 (en) * | 2012-08-28 | 2014-04-24 | Saudi Arabian Oil Company | Method for reconstructing the total organic carbon content from compositional modeling analysis |
Non-Patent Citations (5)
| Title |
|---|
| 于雯泉 等: "海洋沉积物有机碳分析方法中干燥预处理过程人为误差的发现及其意义", 《环境科学学报》 * |
| 付尧等: "植物有机碳测定研究进展", 《世界林业研究》 * |
| 方楷等: "木材碳含量变异研究进展", 《江西林业科技》 * |
| 梅莉等: "水曲柳和落叶松人工林乔木层碳、氮储量及分配", 《应用生态学报》 * |
| 陈立雷等: "海洋沉积物有机碳和稳定氮同位素分析的前处理影响", 《沉积学报》 * |
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Application publication date: 20210608 |