CN105486569B - A kind of continuous experimental provision for extracting each Sulfur in sediment sample - Google Patents
A kind of continuous experimental provision for extracting each Sulfur in sediment sample Download PDFInfo
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- CN105486569B CN105486569B CN201510898993.3A CN201510898993A CN105486569B CN 105486569 B CN105486569 B CN 105486569B CN 201510898993 A CN201510898993 A CN 201510898993A CN 105486569 B CN105486569 B CN 105486569B
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Abstract
The invention discloses a kind of experimental provisions of each Sulfur in continuous extraction deposit, which includes four units, wherein example reaction extraction unit includes reaction vessel, condenser pipe and magnetic stirring apparatus, and reaction vessel is placed on magnetic stirring apparatus；The preparation of reaction reagent and addition unit include chromatographic column, cylindrical separatory funnel and dedicated three-way selector valve, chromatographic column is used to prepare chromium dichloride solution and is added into reaction vessel, for cylindrical separatory funnel for acid adding in reaction vessel, different solutions are added in dedicated three-way selector valve switching；Nitrogen gas circuit unit includes nitrogen cylinder, pressure reducing valve and gas flow meter, and nitrogen is separately connected two gas flowmeters with pipe, one of them connect with the air inlet of chromatographic column upper end, another is connected to the intake interface on reaction vessel；Gas absorbing unit is gas absorption tube.The configuration of the present invention is simple, air-tightness are good, extraction efficiency is high, and easy to operate, quick, effectively can continuously extract the sulphur with six kinds of occurrence patterns in a sediment sample.
Description
Technical field
The present invention relates to a kind of experimental provisions of each Sulfur in continuous extraction sediment sample, are used as in deposit each
The content of kind occurrence patterns sulphur and its Sample Pretreatment Technique and device of Stable Isotopic Analysis, are mainly used for the geochemical of sulphur
Learn the field of cycle and the research of earth history evolution process.
Technical background
In nature, sulphur by a variety of valence states and in the form of exist, redox reaction easily occurs, be control deposit in oxygen
Change the one of the chief elements of reduction system, usually participates in the important diagenetic processes such as exchange, absorption, redox and precipitation.Cause
This, geochemical cycle and the research of earth history evolution process to sulphur have obtained the attention of scholars.With the ground to sulphur
Geochemistry circulating research deepens continuously, and total sulfur content has been not enough to the geochemistry of the complicated sulphur of parsing in Dan Congyong deposits
Process.Therefore, of increasing concern to the research of various occurrence patterns sulphur in deposit, but complete sulfur speciation classification continuously carries
The flow taken has no systematic account, mainly with inorganic sulfur：Based on i.e. sour volatile sulfur, elementary sulfur and pyritic sulfur, extraction side
Method generally uses cold diffusion method and thermal distillation method, the form that cold diffusion method extracts a sample to need to take 24 hours, and
Its extraction rate of thermal distillation method is very fast, but these methods reported are mainly for the extraction of single form, and generally use one
The reaction vessel of a single-necked flask or three-necked flask as extraction, after the extraction process of a certain form, extractant and heavy
Product object is not readily separated, that is, is difficult to continuously extract second, third kind of sulfur speciation.
Invention content
The purpose of the present invention is in view of the deficiencies of the prior art and water-soluble state-can in the continuous extraction deposit of one kind that provides
The experimental provision of exchange state sulphur, sour volatile sulfur, salt acid-solubility sulphur, elementary sulfur, pyritic sulfur and organic sulfur, and from same
Part sediment sample can continuously extract the sulphur of six kinds of occurrence patterns in sample.The device uses high temperature resistant, acid and alkali-resistance, resists simultaneously
High-purity polytetrafluoroethylene (PTFE) (PTFE) material of organic solvent and easy processing is made, and the apparatus structure is simple, air-tightness is good, extraction effect
Rate is high, easy to operate, quick, and effectively can continuously extract the sulphur with six kinds of occurrence patterns in a sediment sample.
Realizing the specific technical solution of the object of the invention is：
A kind of continuous experimental provision for extracting each Sulfur in sediment sample, feature is that the device includes：
A sample reaction member, including reaction vessel, condenser pipe and the magnetic stirring apparatus with heating mantle, reaction vessel
It is placed on the magnetic stirring apparatus with heating mantle, the sealing cover upper end of reaction vessel is equipped with intake interface, liquid feeding interface and outlet
Mouthful；Condenser pipe is installed on the sealing cover upper end gas outlet of reaction vessel, and condenser pipe upper end is equipped with gas outlet, which passes through pipe
Part is directly connected to gas absorbing unit；Intake interface and liquid feeding interface on reaction vessel sealing cover are respectively connected with pipe fitting；
The preparation of one reaction reagent and addition unit, including chromatographic column, cylindrical separatory funnel and dedicated three-way selector valve, chromatographic column
Interior that zinc granule and chromium trichloride solution are housed, bottom is equipped with piston；Hydrochloric acid solution is housed, bottom, which is equipped with, lives in cylindrical separatory funnel
Plug；Dedicated three-way selector valve be set between chromatographic column and the two-piston of cylindrical separatory funnel, and with the liquid feeding on reaction vessel sealing cover
The pipe fitting of interface connects, and chromium dichloride solution and hydrochloric acid solution is added for switching；The gas outlet of chromatographic column passes through pipe fitting and cylinder
Shape separatory funnel is connected to；
One nitrogen gas circuit unit, including nitrogen cylinder, pressure reducing valve and gas flow meter, nitrogen cylinder connect pressure reducing valve, pressure reducing valve
Two gas flowmeters are separately connected by pipe fitting, one of flowmeter is connected by pipe fitting and the air inlet of chromatographic column upper end
It connects, and the connecting pipe is inserted into the chromium trichloride solution in chromatographic column, another flowmeter passes through pipe fitting and reaction vessel
Intake interface connection on sealing cover；
One gas absorbing unit is gas absorption tube, is connected to the pipe fitting of the gas outlet of condenser pipe upper end, the pipe fitting end
Drawing-down is inserted to gas and absorbs bottom of the tube.
The condenser pipe is serpentine condenser.
The reaction vessel is made of high-purity PTFE materials, and the pipe fitting is high-purity PTFE tube that outer diameter is 3mm.
A kind of special continuous extraction of centrifuge tube conduct with thread sealed closure of the present invention high-purity PTFE materials of use first
The reaction vessel of each Sulfur in deposit, when extraction water-soluble state-exchangeable species sulphur, salt acid-solubility sulphur, elementary sulfur and organic
When sulphur, using reaction vessel as centrifuge tube, oscillation can be carried out and in centrifuge directly on shaking table by then screwing on common cover
On be centrifuged；And when the sour volatile sulfur of extraction and pyritic sulfur, as long as centrifuge tube is simply passed through screw thread and spy
The PTFE seal lid of system, which is tightened, can access, and without shifting the soil or sediment sample that are extracted, avoids sample and is shifting
Pollution in the process and loss, thus it is easy to operate, quick, and air-tightness is good.
Secondly, three hickeys of setting are covered in special PTFE seal, one is directly connected to condense using M12 screw threads
Pipe, another two using M6 thread bush can directly be connected to nitrogen and online addition reagent PTFE（Φ3mm）Pipe connects；Condenser pipe
Using serpentine condenser, condensation effect is greatly improved, it is ensured that end gas outlet does not have acid vapor effusion during the experiment, ensures
The hydrogen sulfide gas that sodium hydroxide solution can be generated effectively in absorbing reaction container in gas absorption tube, while the two of condenser pipe
End is all made of M12 hickeys, facilitates installation and connecting line.
Again, the structure of existing experimental provision is simplified, i.e. the gas after condensation eliminates hydrochloric acid vapour passes through
PTFE（Φ3mm）Pipe is directly connect with gas absorption tube, and has done drawing-down processing to the PTFE tube of end gas outlet, is reduced out
The tubing internal diameter of gas port so that outlet bubble is substantially reduced, and improves the efficiency that sodium hydroxide solution absorbs hydrogen sulfide gas.
Finally, chemical reagent used is added online using dedicated three-way selector valve, and is passed through certain nitrogen protection, avoids
The introducing of surrounding air and the preparation efficiency for influencing chromium dichloride reagent, at the same also avoid the air dissolved in hydrochloric acid solution into
Enter reactor and influence sour volatile sulfur and the extraction efficiency of pyritic sulfur, it is ensured that inertia of the whole experiment process in an anaerobic
It is carried out in closed system.
In conclusion the experimental provision of each Sulfur includes sample in a kind of continuous extraction sediment sample provided by the invention
Product reaction member, the preparation of reaction reagent and addition unit, nitrogen gas circuit unit and gas absorbing unit.Between the device each unit
Connection it is easy, quickly, air-tightness it is good, effectively can continuously extract the sulphur of six kinds of occurrence patterns in deposit, and pass through inductance coupling
Sulfur content and sulfur isotope in each Sulfur sample solution obtained by the above-mentioned continuous extraction of Plasma Mass Spectrometry are closed, can be
The geochemical cycle of sulphur and the science data extremely abundant in the research offer of earth history evolution process.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is reaction vessel sealing cover vertical view of the present invention.
Specific implementation mode
Refering to fig. 1-2, the present invention includes example reaction extraction unit, the preparation of reaction reagent and addition unit, nitrogen gas
Road unit and gas absorbing unit.Wherein：
The example reaction extraction unit includes with high-purity polytetrafluoroethylene (PTFE)（PTFE）It is the special reaction vessel 13 of material, cold
Solidifying pipe 17 and the magnetic stirring apparatus 23 with heating mantle, reaction vessel 13 are placed on the magnetic stirring apparatus 23 with heating mantle,
The upper end of its sealing cover 14 is equipped with intake interface 15, liquid feeding interface 16 and gas outlet 18, wherein using M12 screw threads in gas outlet 18
M12 screw threads and polyvinyl fluoride are used with the gas outlet 19 of PTFE washer close installations serpentine condenser 17,17 upper end of condenser pipe
（ETFE）The PTFE tube that washer is 3mm with outer diameter is directly connected to gas absorbing unit 22, and tracheae end is drawn and attenuated and is inserted into gas
The bottom of body absorptive unit, intake interface 15 and liquid feeding interface 16 on reaction vessel sealing cover 14 be all made of M6 threaded sleeves and
ETFE taper washers can be directly connected to the PTFE tube that outer diameter is 3mm.
The preparation of the reaction reagent and unit is added includes chromatographic column 4, cylindrical separatory funnel 9 and dedicated three-way selector valve 12,
Zinc granule 5 and chromium trichloride solution are housed in chromatographic column 4, chromium dichloride solution is used to prepare and is added into reaction vessel 13,
Hydrochloric acid solution is housed in cylindrical separatory funnel 9, for acid adding in reaction vessel 13, solution in chromatographic column 4 and separatory funnel 9
Outflow is controlled by PTFE pistons 10 and 11 respectively, and is connected to respectively with dedicated three-way selector valve 12 by pipe fitting, and dedicated three-way selector valve 12
It is directly connected to the liquid feeding interface of reaction vessel 13 16, addition chromium dichloride solution is switched by dedicated three-way selector valve 12 or hydrochloric acid is molten
Liquid.
The nitrogen gas circuit unit includes nitrogen cylinder 1,2 and gas flow meter 3 of pressure reducing valve, nitrogen cylinder 1 by pressure reducing valve 2 with
Two gas flowmeters 3 are directly connected to, and one of flowmeter A3 passes through pipe fitting and chromium dichloride solution preparation unit chromatographic column 4
The air inlet 7 of upper end connects, and the pipe fitting is inserted into the chromium trichloride solution in chromatographic column 4 by sealing-plug 6, chromatographic column 4
Gas outlet 8 is connected to by pipe fitting with cylindrical separatory funnel 9；Another flowmeter B3 and the intake interface 15 of reaction vessel 13 connect
It is logical.
The gas absorbing unit is gas absorption tube 22, sodium hydroxide solution is housed in pipe, with 17 upper end of condenser pipe
The pipe fitting of gas outlet 19 is connected to, which draws and attenuates and be inserted to 22 bottom of gas absorption tube.
All connecting pipes of the present invention are all made of the PTFE tube that outer diameter is 3mm and nipple and gasket progress is closed
Connection, it is ensured that it is with good air-tightness.
Before the present invention is used as in deposit the content of various occurrence patterns sulphur and its sample of Stable Isotopic Analysis
Reason technology and device can be sulphur content in deposit：Water-soluble state-exchangeable species sulphur, sour volatile sulfur, salt acid-solubility sulphur,
Six kinds of elementary sulfur, pyritic sulfur and organic sulfur occurrence patterns.Specific extraction flow is as follows：
The extraction of water-soluble state-exchangeable species sulphur：It accurately weighs 1.0000 g soil or sediment sample is placed in reaction vessel
13（Centrifuge tube）In, extraction reagent is added, tightens centrifuge tube lid (normal pipe lid), after oscillation and centrifugation, pipettes supernatant, this
Sulphur in supernatant is water-soluble state-exchangeable species sulphur.
The extraction of sour volatile sulfur：In the above-mentioned centrifuge tube access device containing residual residue, nitrogen cylinder 1, decompression will be opened
2 and gas flow meter B3 of valve adjusts nitrogen flow rate, so that nitrogen is flowed through air of the entire experimental provision to remove in device, together
When check and ensure that end gas outlet is inserted into equipped with sodium hydroxide solution by the air-tightness of each connector, ventilation after a certain period of time
The piston 11 of separatory funnel 9 is opened in the bottom of absorption tube 22, by dedicated three-way selector valve 12 and liquid feeding interface 16 by separatory funnel 9
In hydrochloric acid solution be slowly added into reaction vessel 13, open 23 power supply of magnetic stirring apparatus, open heating and adjusting furnace temperature
It at 100 DEG C or so, opens magnetic agitation and is stirred with slow uniform speed, wait for after reaction, closing 23 electricity of magnetic stirring apparatus
Gas absorption tube 22 is removed in source, closes nitrogen cylinder 1, and the sulphur in 22 solution of gas absorption tube is sour volatile sulfur at this time.
The extraction of salt acid-solubility sulphur：Centrifuge tube is removed after the cooling of above-mentioned reaction solution, is tightened after pipe lid is centrifuged,
Supernatant is pipetted, the sulphur in this supernatant is salt acid-solubility sulphur.
The extraction of elementary sulfur：Acetone is added in the above-mentioned centrifuge tube containing residual residue, tightens pipe lid, after oscillation centrifuges
Supernatant is pipetted, sulphur is elementary sulfur in this supernatant.
The extraction of pyritic sulfur：By in the above-mentioned centrifuge tube access device containing residual residue, in the chromatographic column equipped with zinc granule 5
Chromium trichloride solution is added in 4, opens nitrogen cylinder 1, pressure reducing valve 2 and gas flow meter A3 and B3, adjusts nitrogen flow rate, makes nitrogen
Air of the entire experimental provision to remove in device is flowed through, while checking and ensuring the air-tightness of each connector, waits for chromatographic column 4
In reaction solution when becoming sapphirine by green, i.e., prepared by chromium dichloride completes, and is then inserted into end gas outlet and hydrogen-oxygen is housed
Change the bottom of the absorption tube 22 of sodium solution, open the piston 10 of chromatographic column 4, by dedicated three-way selector valve 12 and liquid feeding interface 16 by layer
Chromium dichloride solution in analysis column 4 is slowly added into reaction vessel 13, and then switching selector valve 12 will be in separatory funnel 9
Hydrochloric acid solution is slowly added into reaction vessel 13, opens 23 power supply of magnetic stirring apparatus, opens heating and adjusting furnace temperature is 100
DEG C or so, it opens magnetic agitation and is stirred with slow uniform speed, wait for after reaction, closing 23 power supply of magnetic stirring apparatus, taking
Lower gas absorption tube closes nitrogen cylinder 1, and the sulphur in 22 solution of gas absorption tube is pyritic sulfur at this time.
The extraction of organic sulfur：Centrifuge tube is removed after the cooling of above-mentioned reaction solution, tightens after pipe lid is centrifuged, discards
Clear liquid dries residual residue, ground sieving at 105 DEG C, weighs the 0.1000 g residues using micro-wave digestion, this resolution
Sulphur in liquid is organic sulfur.
Finally, each Sulfur sample solution obtained by above-mentioned continuous extraction is measured using inductively coupled plasma mass spectrometry
Middle sulfur content and sulfur isotope, be obtained by calculation the content of six kinds of occurrence patterns sulphur in soil or sediment sample, distribution with
And the fractionating degree of sulfur isotope.
Claims (3)
1. the experimental provision of each Sulfur in a kind of continuous extraction sediment sample, it is characterised in that the device includes：
A sample reacts extraction unit, including reaction vessel, condenser pipe and the magnetic stirring apparatus with heating mantle, reaction vessel
It is placed on the magnetic stirring apparatus with heating mantle, the sealing cover upper end of reaction vessel is equipped with intake interface, liquid feeding interface and outlet
Mouthful；Condenser pipe is installed on the sealing cover upper end gas outlet of reaction vessel, and condenser pipe upper end is equipped with gas outlet, which passes through pipe
Part is directly connected to gas absorbing unit；Intake interface and liquid feeding interface on reaction vessel sealing cover are respectively connected with pipe fitting；
The preparation of one reaction reagent and addition unit, including chromatographic column, cylindrical separatory funnel and dedicated three-way selector valve, chromatographic column are built-in
There are zinc granule and chromium trichloride solution, bottom to be equipped with piston；Hydrochloric acid solution is housed, bottom is equipped with piston in cylindrical separatory funnel；Three
Logical selector valve is set between chromatographic column and the two-piston of cylindrical separatory funnel, and with the liquid feeding interface on reaction vessel sealing cover
Pipe fitting connects, and chromium dichloride solution and hydrochloric acid solution is added for switching；The gas outlet of chromatographic column passes through pipe fitting and tubular liquid separation
Funnel is connected to；
One nitrogen gas circuit unit, including nitrogen cylinder, pressure reducing valve and gas flow meter, nitrogen cylinder connect pressure reducing valve, and pressure reducing valve passes through
Pipe fitting is separately connected two gas flowmeters, and one of flowmeter is connect by pipe fitting with the air inlet of chromatographic column upper end, and
The connecting pipe is inserted into the chromium trichloride solution in chromatographic column, another flowmeter passes through pipe fitting and reaction vessel sealing cover
On intake interface connection；
One gas absorbing unit is gas absorption tube, is connected to the pipe fitting of the gas outlet of condenser pipe upper end that the pipe fitting end draws and attenuates
It is inserted to gas and absorbs bottom of the tube；
The device is used as the content of various occurrence patterns sulphur and its sample pre-treatments of Stable Isotopic Analysis dress in deposit
It sets, is sulphur content in deposit：Water-soluble state-exchangeable species sulphur, sour volatile sulfur, salt acid-solubility sulphur, elementary sulfur, pyritic sulfur
With six kinds of occurrence patterns of organic sulfur；Specific extraction flow is as follows：
The extraction of water-soluble state-exchangeable species sulphur：It accurately weighs 1.0000g sediment samples to be placed in reaction vessel, extraction is added
Reagent tightens centrifuge tube lid, after oscillation and centrifugation, pipettes supernatant, and the sulphur in this supernatant is water-soluble state-exchangeable species
Sulphur；
The extraction of sour volatile sulfur：Will in the above-mentioned reaction vessel access device containing residual residue, open nitrogen cylinder, pressure reducing valve and
Gas flowmeter adjusts nitrogen flow rate, so that nitrogen is flowed through air of the entire experimental provision to remove in device, while checking simultaneously
Ensure that the gas outlet of condenser pipe upper end is inserted into equipped with sodium hydroxide solution by the air-tightness of each connector, ventilation after a certain period of time
The piston of cylindrical separatory funnel is opened in the bottom of absorption tube, will be in cylindrical separatory funnel by dedicated three-way selector valve and liquid feeding interface
Hydrochloric acid solution be slowly added into reaction vessel, open the power supply of magnetic stirring apparatus, open heating and adjusting furnace temperature is to 100
DEG C, it is stirred with slow uniform speed, waits for the power supply for closing magnetic stirring apparatus after reaction, remove gas absorption tube, close
Nitrogen cylinder, the sulphur in gas absorption tube solution is sour volatile sulfur at this time；
The extraction of salt acid-solubility sulphur：Reaction vessel is removed after the cooling of above-mentioned reaction solution, centrifuge tube lid is tightened, is centrifuged
Afterwards, supernatant is pipetted, the sulphur in this supernatant is salt acid-solubility sulphur；
The extraction of elementary sulfur：Acetone is added in the above-mentioned reaction vessel containing residual residue, tightens centrifuge tube lid, is centrifuged through oscillation
After pipette supernatant, in this supernatant sulphur be elementary sulfur；
The extraction of pyritic sulfur：By in the above-mentioned reaction vessel access device containing residual residue, in the chromatographic column equipped with zinc granule
Chromium trichloride solution is added, opens nitrogen cylinder, pressure reducing valve and gas flow meter, adjusts nitrogen flow rate, nitrogen is made to flow through entire reality
The experiment device air in device to remove, while checking and ensuring the air-tightness of each connector, wait for the reaction solution in chromatographic column
When becoming sapphirine by green, i.e., prepared by chromium dichloride completes, and condensation pipe end gas outlet is inserted into, sodium hydroxide solution is housed
Absorption tube bottom, the piston of chromatographic column is opened, by dedicated three-way selector valve and liquid feeding interface by the chromium dichloride in chromatographic column
Solution is slowly added into reaction vessel, is then switched selector valve and is slowly added into the hydrochloric acid solution in separatory funnel instead
It answers in container, opens the power supply of magnetic stirring apparatus, open heating and adjusting furnace temperature is to 100 DEG C, stirred with slow uniform speed,
The power supply for waiting for closing magnetic stirring apparatus after reaction removes gas absorption tube, closes nitrogen cylinder, gas absorption tube is molten at this time
Sulphur in liquid is pyritic sulfur；
The extraction of organic sulfur：Reaction vessel is removed after the cooling of above-mentioned reaction solution, centrifuge tube lid is tightened, after being centrifuged, abandons
Supernatant is removed, residual residue is dried at 105 DEG C, ground sieving, the 0.1000g residues is weighed and uses micro-wave digestion, this
Sulphur in digestion solution is organic sulfur；
Finally, sulphur in each Sulfur sample solution obtained by above-mentioned continuous extraction is measured using inductively coupled plasma mass spectrometry
The content of six kinds of occurrence patterns sulphur, distribution and sulfur isotope in sediment sample is obtained by calculation in content and sulfur isotope
Fractionating degree.
2. experimental provision according to claim 1, it is characterised in that the condenser pipe is serpentine condenser.
3. experimental provision according to claim 1, it is characterised in that the reaction vessel is made of polytetrafluoroethylene (PTFE) material,
The pipe fitting is polyfluortetraethylene pipe.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108152099B (en) * | 2017-12-13 | 2019-03-12 | 中国科学院地质与地球物理研究所 | The extracting method of organic sulfur in the carbonate rock of the low content of organic matter |
| CN108562571A (en) * | 2018-06-07 | 2018-09-21 | 中国有色桂林矿产地质研究院有限公司 | The assay method of effective sulphur in soil |
| CN108896700B (en) * | 2018-06-25 | 2024-05-28 | 南方电网科学研究院有限责任公司 | Compatibility test system |
| CN109238788B (en) * | 2018-09-29 | 2021-05-18 | 浙江省海洋水产研究所 | Device and method for collecting VOC in water body |
| CN109387390B (en) * | 2018-11-23 | 2022-04-15 | 江苏大学 | Sediment anaerobic incubator |
| CN110208062A (en) * | 2019-06-26 | 2019-09-06 | 核工业北京地质研究院 | Multichannel extraction element and method for pyritic sulfur in rock, pedotheque |
| CN110716003A (en) * | 2019-09-23 | 2020-01-21 | 河海大学 | Extraction device, extraction method and determination method for reductive inorganic sulfur in sediment |
| CN113698603B (en) * | 2021-08-21 | 2022-05-17 | 昆明理工大学 | Method for preparing sulfur-containing high-molecular functional material by using sulfur dioxide flue gas |
| CN115855603A (en) * | 2023-01-03 | 2023-03-28 | 成都理工大学 | Device and method for efficiently extracting pyrite sulfur in ancient sediments |
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| CN101008592A (en) * | 2007-01-22 | 2007-08-01 | 中国科学院广州地球化学研究所 | Sampling device for volatile gas on the surface of water body and soil and sampling method thereof |
| CN202145205U (en) * | 2011-06-29 | 2012-02-15 | 华南理工大学 | Device for quickly detecting water body sediment AVS and SEM |
| CN102353638A (en) * | 2011-06-29 | 2012-02-15 | 华南理工大学 | Method and apparatus for rapid determination of water body sediment AVS and SEM |
| CN102998157B (en) * | 2012-11-30 | 2015-08-19 | 中国地质大学（武汉） | A kind of device extracting sour volatile sulfur in geological sample |
| CN103018084B (en) * | 2012-11-30 | 2015-03-18 | 中国地质大学（武汉） | Device for extracting pyritic sulfur contained in geological sample |
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Effective date of registration: 20221213 Address after: 200241 Room 0881, Floor 2, Jilou, 555 Dongchuan Road, Minhang District, Shanghai Patentee after: Shanghai Hanghong Engineering Management Co.,Ltd. Address before: 200241 No. 500, Dongchuan Road, Shanghai, Minhang District Patentee before: EAST CHINA NORMAL University |