Cultivation landscape plant sulfur isotope determination method and application

A sulfur isotope and determination method technology, which is applied in the direction of measuring devices, chemical analysis by catalysis, and material analysis by electromagnetic means, can solve the problems of affecting detection results and difficult to focus receivers, etc., and achieve good reproducibility, Ease of handling, improved accuracy and reproducible results

Inactive Publication Date: 2021-04-30
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When switching from carbon and nitrogen isotope detection to sulfur isotope detection, due to the influence of the memory effect of the instrument, SO with a high mass-to-charge ratio 2 + Difficult to effectively focus on the receiver, affecting detection results

Method used

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  • Cultivation landscape plant sulfur isotope determination method and application
  • Cultivation landscape plant sulfur isotope determination method and application
  • Cultivation landscape plant sulfur isotope determination method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The sulfur isotope determination method and application of cultivated landscape plants comprise the following steps:

[0021] a. After drying, grinding, and filtering the cultivated landscape plant samples, accurately weigh 5.0 mg of the sample and put it into a tin cup and wrap it.

[0022] b. IAEA-S-1 (silver sulfide, δS34=-0.30‰), IAEA-S-3 (silver sulfide, δS34=-32.3‰), NBS-127 (barium sulfate, δS34=20.3‰) is the standard product.

[0023] c. Use an element analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the element analyzer are: oxidation furnace 960 ° C, separation column 80 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and granular pure Copper 50 grams.

[0024] d. The high-energy ion source ionizes the sample to generate SO+; the ion source parameters of the stable isotope mass spectrometer are: ion source high voltage 6.3KV, carrier gas He pressure 15psi, ion source fi...

Embodiment 2

[0032] The sulfur isotope determination method and application of cultivated landscape plants comprise the following steps:

[0033] a. After drying, grinding and filtering the cultivated landscape plant samples, accurately weigh 1.0, 2.5, 4.0, 5.5, 7.0, 8.5 and 10.0 mg samples respectively, put them into tin cups and wrap them.

[0034] b. IAEA-S-1 (silver sulfide, δS34=-0.30‰), IAEA-S-3 (silver sulfide, δS34=-32.3‰), NBS-127 (barium sulfate, δS34=20.3‰) is the standard product.

[0035] c. Use an element analyzer-stable isotope mass spectrometer to detect the sample to be tested; the parameters of the element analyzer are: oxidation furnace 960 ° C, separation column 80 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and granular pure Copper 50 grams.

[0036] d. The high-energy ion source ionizes the sample to generate SO+; the ion source parameters of the stable isotope mass spectrometer are: ion source high voltage 6.3KV, carr...

Embodiment 3

[0044] comparative test

[0045]

[0046] To sum up, the method of the present invention has the advantages of high precision, good repeatability, high accuracy, easy operation, high efficiency, etc., and is a perfect and supplement to the blank sulfur isotope detection technology of the existing cultivated landscape plant samples.

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PUM

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Abstract

The invention discloses a method for generating SO+ by utilizing secondary ionization of an isotope mass spectrum ion source so as to accurately and efficiently detect sulfur stable isotopes in a cultivated landscape plant sample, which comprises the following specific steps: drying, grinding and filtering the cultivated landscape plant sample by a screen, filling a tin cup with the dried and ground cultivated landscape plant sample, and wrapping; and detecting the sample to be detected by adopting an element analyzer stable isotope mass spectrometer. High voltage of the tuning ion source and filament voltage are utilized to generate high-energy electron flow to perform secondary ionization on SO2+, SO+ is generated to perform sulfur isotope detection, and the result shows that the precision is high, the repeatability is good, and the analysis and test efficiency is high.

Description

[0001] The invention is supported by Tianjin Normal University Education Fund (043-135202WT1703). technical field [0002] The invention belongs to the technical field of stable isotope analysis, and in particular relates to a sulfur isotope determination method and application of cultivated landscape plants. Background technique [0003] Sulfur stable isotope analysis technology has been applied in many fields such as environmental protection and agricultural production, especially in the study of the mechanism of plant sulfur migration and transformation and the traceability of pollutants. [0004] At present, the common sulfur stable isotope analysis method is the combination of an elemental analyzer and a mass spectrometer, that is, the sulfur element in the sample is oxidized to sulfur dioxide by the elemental analyzer, and then the sulfur dioxide (SO 2 ) into sulfur dioxide ions (SO 2 + ) for sulfur isotope ratio analysis. But the SO involved in the method 2 + (an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64G01N27/68G01N31/10
CPCG01N27/68G01N27/64G01N31/10
Inventor 高健赵静媛李煜王义东尚云涛李玉琴
Owner TIANJIN NORMAL UNIVERSITY
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