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Method for detecting sulfur stable isotope of six-petal red garlic in sulfur monoxide mode

A stable isotope, pattern detection technology, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as affecting detection results, difficult to focus receivers, etc., achieving good reproducibility, easy operation, and accuracy. high effect

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 six-petal red garlic in sulfur monoxide mode
  • Method for detecting sulfur stable isotope of six-petal red garlic in sulfur monoxide mode
  • Method for detecting sulfur stable isotope of six-petal red garlic in sulfur monoxide mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for detecting sulfur stable isotopes of six-petal red garlic in sulfur monoxide mode, comprising the following steps:

[0022] a. After drying, grinding, and sieve-filtering the "Liupethong" garlic bulb sample, accurately weigh 5.0 mg of the sample and put it into a tin cup and wrap it;

[0023] 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.

[0024] 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.

[0025] 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 6KV, the pressure ...

Embodiment 2

[0033] A method for detecting sulfur stable isotopes of six-petal red garlic in sulfur monoxide mode, comprising the following steps:

[0034] a. After drying, grinding, and filtering the "Liu Petanhong" garlic bulb 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.

[0035] 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.

[0036] 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.

[0037] 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 o...

Embodiment 3

[0045] comparative test

[0046]

[0047] In summary, the method of the present invention has the characteristics of high precision, good repeatability, high analysis efficiency, and easy operation, and can be applied to the detection of sulfur isotopes in "Liupethong" garlic samples.

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Abstract

The invention discloses a method for detecting sulfur stable isotope of six-petal red garlic in an SO+ mode, which comprises the following specific steps: drying, grinding and filtering a six-petal red garlic bulb sample by a screen, filling the six-petal red garlic bulb sample into a tin cup, wrapping, and detecting a sample to be detected by adopting an element analyzer-stable isotope mass spectrometer. According to the method, the tuning ion source electron bombardment source generates the high-energy electron flow to perform secondary ionization on SO2+ to generate SO+, and the signal stability of the SO+ is improved by controlling the pressure intensity of the carrier gas, so that the accurate and efficient detection of the sulfur isotope ratio of the six-petal red garlic is realized, the result precision is high, the reproducibility is good, and the operation is easy.

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. Baodi "six petals red" garlic, as a national geographical landmark characteristic crop, has distinctive characteristics: the garlic skin is mostly purple-red, the garlic head usually has 4 or 6 petals, a single-colu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 王振英尚云涛李海燕田立鹏耿以工范宝莉刘晓颖
Owner TIANJIN NORMAL UNIVERSITY
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