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Method for detecting sulfur stable isotope of Jinjiang No.1 garlic

A stable isotope, sulfur isotope technology, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of affecting detection results, difficult to focus receivers, etc., to achieve good reproducibility, easy operation, and improved accuracy. Sexual and Reproducible Effects

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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  • Method for detecting sulfur stable isotope of Jinjiang No.1 garlic
  • Method for detecting sulfur stable isotope of Jinjiang No.1 garlic
  • Method for detecting sulfur stable isotope of Jinjiang No.1 garlic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for detecting the sulfur stable isotope of Jinjiang No. 1 garlic, comprising the following steps:

[0023] a. After the Jinjiang No. 1 garlic bulb sample is dried, ground, and sieved, accurately weigh 5.0 mg of the sample and put it into a tin cup and wrap it;

[0024] 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.

[0025] 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 1020 ° C, column oven 85 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and granular 50 grams of pure copper.

[0026] d. The high-energy ion source ionizes the sample to generate SO + The parameters of the ion source of the stable isotope mass spectrometer are: the core voltage of the ion source is 6.3KV, the pressure of the carrier gas He is ...

Embodiment 2

[0034] A method for detecting the sulfur stable isotope of Jinjiang No. 1 garlic, comprising the following steps:

[0035] a. After the Jinjiang No. 1 garlic bulb sample was dried, ground, and sieved, the samples of 1.0, 2.5, 4.0, 5.5, 7.0, 8.5, and 10.0 mg were accurately weighed and put into tin cups and wrapped.

[0036] 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.

[0037] 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 1020 ° C, column oven 85 ° C, the catalyst in the quartz tube in the oxidation furnace is 25 grams of tungsten oxide and granular 50 grams of pure copper.

[0038] d. The high-energy ion source ionizes the sample to generate SO +The parameters of the ion source of the stable isotope mass spectrometer are: the core voltage of the ion source is 6.3KV,...

Embodiment 3

[0046] comparative test

[0047]

[0048] In summary, the method of the present invention has the advantages of high precision, good repeatability, and simple operation, and can effectively improve the ability of sulfur isotope analysis and detection of Jinjiang No. 1 garlic sample.

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Abstract

The invention discloses a method for detecting sulfur stable isotope of Jinjiang No.1 garlic in an SO+ mode, which comprises the following specific steps: drying, grinding and filtering a Jinjiang No.1 garlic bulb sample by a screen, filling into a tin cup, wrapping, and detecting a sample to be detected by adopting an element analyzer- stable isotope mass spectrometer. The secondary ionization effect of high-energy electron flow on SO2+ is realized by tuning the half-plate voltage of the ion source and the pressure of the carrier gas, and SO+ is generated for sulfur isotope detection, so that the efficiency and precision of the sulfur isotope ratio of Jinjiang No.1 garlic are improved, the result reproducibility is good, the accuracy is high, and the operation is simple and convenient.

Description

[0001] The invention was funded by the 2021 Agricultural Achievement Transformation and Promotion Project of the Tianjin Agricultural Commission. technical field [0002] The invention belongs to the technical field of stable isotope analysis, and in particular relates to a method for detecting garlic sulfur stable isotope. Background technique [0003] Garlic is an important spicy vegetable variety on the table of our people, and has important edible and medicinal values. A number of studies have confirmed that a variety of biologically active substances contained in garlic, such as allicin and polysaccharides, have significant anti-virus, anti-cancer cell activity, anti-thrombosis, lowering blood lipids, lowering blood pressure, and alleviating atherosclerosis. [0004] Plant tissue culture refers to the cultivation of isolated plant organs, tissues, cells or protoplasts under sterile environment conditions, artificially controlling temperature, light, humidity, nutrition,...

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 范宝莉王振英尚云涛刘晓颖高健田立鹏
Owner TIANJIN NORMAL UNIVERSITY
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