Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for measuring carbon and oxygen isotopes of carbonate samples containing nitrate

A measurement method, nitrate technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as inability to accurately measure carbon and oxygen isotopes, and achieve the effect of improving test accuracy, accuracy, and purity

Active Publication Date: 2019-10-18
INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of stalagmites is calcium carbonate, but when the water body erodes the bedrock through the soil layer, impurities such as nitrate in the soil will also be mixed in. Some stalagmites are mixed with nitrate during the formation process, and traditional methods cannot be accurate. Determination of carbon and oxygen isotopes of nitrate-containing stalagmite calcium carbonate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for measuring carbon and oxygen isotopes of carbonate samples containing nitrate
  • A method for measuring carbon and oxygen isotopes of carbonate samples containing nitrate
  • A method for measuring carbon and oxygen isotopes of carbonate samples containing nitrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Accurate determination of carbon and oxygen isotopes of salt lake samples containing nitrate, the salt lake samples used were collected from the same section of a certain salt lake, and the samples were numbered JG04-10, NE01-09, NE01-10, NE01-11, NE01-12, NE01-14, JC02-04, LWD01-06, JCSP01-G02, JCSP01-G04. It is measured by the following method:

[0064] Add nitrate-doped carbonate sample powder of the same number less than 200 mesh into a borosilicate reaction bottle, dry in an oven, tighten the bottle cap and place it on a constant temperature sample tray at 25°C, and use an automatic sampler to Fill the sample bottle with high-purity helium for 8 minutes to blow out the air in the bottle; manually drop 6-8 drops of 100% phosphoric acid into each sample bottle, and react for 10 hours at a constant temperature of 25°C. CO produced by the reaction 2 After the gas (including miscellaneous gas) is processed by the following path, helium is introduced into the gas sourc...

Embodiment 2

[0075] The carbon and oxygen isotopes of stalagmite samples containing nitrate are accurately determined, and the samples used are continuous samples collected from the same stalagmite, and the content of nitrate is 1%. The samples were numbered Test1-Test22. Each group of numbered samples was collected from Fujian, and the following methods were used for its determination:

[0076] Put the stalagmite sample powder of the same number less than 200 mesh into the borosilicate reaction bottle, put it in an oven to dry, tighten the bottle cap and place it on a constant temperature sample tray at 25°C, and fill the sample bottle with high-purity helium in turn with an automatic sampler 8 minutes to blow out the air in the bottle; manually drop 6-8 drops of 100% phosphoric acid into each sample bottle, and react for 20 hours at a constant temperature of 25°C. CO produced by the reaction 2 The gas (including miscellaneous gas) is introduced into the gas source isotope ratio mass sp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention provides a measurement method of carbon and oxygen isotopes of a nitrate-containing carbonate sample, and belongs to the technical field of isotope analysis of rock minerals. The measurement method comprises the following steps: carrying out replacement reaction on the nitrate-containing carbonate sample and phosphoric acid under an inertial atmosphere, thus obtaining nitrogen oxide-containing carbon dioxide gas, wherein the temperature of the replacement reaction is 25 DEG C, and the time is 24 to 28 hours; enabling the nitrogen oxide-containing carbon dioxide gas to pass through a heatable chromatographic column, thus obtaining carbon dioxide gas, wherein the temperature of the heatable chromatographic column is 45 DEG C; baking the heatable chromatographic column at 140 DEG C after completing sequencing on 88 samples in one sequence, wherein the baking time is 4 to 24 hours; introducing the obtained carbon dioxide gas to a mass spectrometer, and carrying out carbon andoxygen isotope determination. According to the measurement method provided by the invention, the analytical testing accuracy of the carbon and oxygen isotopes of nitrate-containing carbonate can be up to 0.02 percent; the measurement method has an important significance in analyzing a part of stalagmite and carbonate samples in high-salinity regions (such as a salt lake).

Description

technical field [0001] The invention relates to the technical field of isotope analysis of rock minerals, in particular to a method for measuring carbon and oxygen isotopes of carbonate samples containing nitrate. Background technique [0002] Salt samples are rich in various halides, carbonates, sulfates, nitrates, etc. During the determination of carbon and oxygen isotopes of salt samples, it is impossible to accurately determine the carbon and oxygen isotopes of salt samples according to the traditional method. carbon and oxygen isotopes. [0003] The lithology of the salt lake deposits is mainly composed of mudstone, argillaceous carbonate rock, and carbonate mudstone, with some argillaceous glauberite, anhydrite, pyrite, magnesite and other complex mixtures of minerals Rocks. The composition of carbonate rocks in salt lakes contains important paleoclimate and paleoenvironmental clues. Through the study of carbonate rocks in salt lakes, the changes in paleoclimate and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 高建飞范昌福胡斌李延河
Owner INST OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI