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Method for quickly detecting fluorine content in specific vegetables

A technology for rapid determination of fluorine content, applied in measuring devices, material analysis by electromagnetic means, instruments, etc., which can solve problems such as long incubation period and onset of disease

Inactive Publication Date: 2011-09-07
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metal residues in vegetables cannot be removed by boiling or soaking. The harm to the human body is cumulative and has a long incubation period. At the beginning, people have no symptoms and are not easy to detect at ordinary times, but when they accumulate to a certain extent, they will develop symptoms , and very serious

Method used

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  • Method for quickly detecting fluorine content in specific vegetables
  • Method for quickly detecting fluorine content in specific vegetables
  • Method for quickly detecting fluorine content in specific vegetables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Dried the pakchoi collected in the supermarket at 80°C to constant weight, and put them in a desiccator for testing;

[0063] (2) Extraction solution:

[0064] 1) Pipette 14ml of concentrated sulfuric acid with 1.0mol / L sulfuric acid, dilute with distilled water, and finally adjust the volume to 1L with a volumetric flask;

[0065] 2) 0.2mol / L sodium citrate-1mol / L sodium nitrate: weigh 58.8g sodium citrate dihydrate and 85g sodium nitrate, add water to dissolve, transfer to a 1000ml volumetric flask, dilute to the marked line, and shake well;

[0066] 3) Prepare 100μg / ml sodium fluoride standard stock solution containing fluoride ions first, then pipette 10.00ml of the stock solution with a 10ml pipette, pour it into a 100ml volumetric flask, dilute to the marked line, and shake well for later use;

[0067] (3) Preparation of standard curve:

[0068] Use a pipette to pipette 0.25, 0.50, 1.00, 3.00, 5.00, 10.00ml of fluoride standard solution respectively, put it ...

Embodiment 2

[0072] (1) Dry the parsley collected in the supermarket at 80°C to constant weight, and put it in a desiccator for testing;

[0073] (2) Extraction solution:

[0074] 1) Pipette 14ml of concentrated sulfuric acid with 1.0mol / L sulfuric acid, dilute with distilled water, and finally adjust the volume to 1L with a volumetric flask;

[0075] 2) 0.2mol / L sodium citrate-1mol / L sodium nitrate: weigh 58.8g sodium citrate dihydrate and 85g sodium nitrate, add water to dissolve, transfer to a 1000ml volumetric flask, dilute to the marked line, and shake well;

[0076] 3) Prepare 100μg / ml sodium fluoride standard stock solution containing fluoride ions first, then pipette 10.00ml of the stock solution with a 10ml pipette, pour it into a 100ml volumetric flask, dilute to the marked line, and shake well for later use;

[0077] (3) Preparation of standard curve:

[0078] Use a pipette to pipette 0.25, 0.50, 1.00, 3.00, 5.00, 10.00ml of fluoride standard solution respectively, put it in a...

Embodiment 3

[0082] (1) Dry the carrots collected in the supermarket at 80°C to constant weight, and put them in a desiccator for testing;

[0083] (2) Extraction solution:

[0084] 1) Pipette 14ml of concentrated sulfuric acid with 1.0mol / L sulfuric acid, dilute with distilled water, and finally adjust the volume to 1L with a volumetric flask;

[0085] 2) 0.2mol / L sodium citrate-1mol / L sodium nitrate: weigh 58.8g sodium citrate dihydrate and 85g sodium nitrate, add water to dissolve, transfer to a 1000ml volumetric flask, dilute to the marked line, and shake well;

[0086] 3) Prepare 100μg / ml sodium fluoride standard stock solution containing fluoride ions first, then pipette 10.00ml of the stock solution with a 10ml pipette, pour it into a 100ml volumetric flask, dilute to the marked line, and shake well for later use;

[0087] (3) Preparation of standard curve:

[0088] Use a pipette to pipette 0.25, 0.50, 1.00, 3.00, 5.00, 10.00ml of fluoride standard solution respectively, put it in...

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Abstract

The invention discloses a method for quickly detecting fluorine content in specific vegetables. In the invention, an ion selective electrode method is used to detect the concentration content of fluoride in vegetables; Fluorine contents in leafy, root and tuber, and fruit vegetables from the majority of supermarket in Tianjin, and reasons of fluorine content difference in the vegetables are analyzed, wherein the fluorine content in common leafy vegetable is obviously higher than that in the other two vegetables, the main reason is probably that the leafy vegetable absorbs fluorine from the air and solid dust through pores on leaf surfaces during the growing process and the fluorine are enriched continually; meanwhile, fluorine content in green vegetables is far lower than that in the same common vegetables. The results show that the method for quickly detecting fluorine content in the specific vegetables is effective.

Description

technical field [0001] The invention belongs to the technical field of determination of pesticide residues, and relates to a determination method of pesticide residues in agricultural products and vegetables, more specifically, a rapid determination method of fluorine content in several vegetables. Background technique [0002] Food quality and safety status is an important symbol of a country's economic development level and people's quality of life. Vegetables are one of the most basic consumer goods, and their safety issues are related to the health of the entire nation. Therefore, the quality and safety of fresh vegetables has become the focus of our government and the public, and has become a key factor that affects the international competitiveness of our vegetables and continues to increase the income of our farmers. For a long time, heavy metal pollution has been one of the main factors affecting the quality and safety of agricultural products in my country. Due to...

Claims

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Application Information

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IPC IPC(8): G01N27/416
Inventor 赵树兰多立安
Owner TIANJIN NORMAL UNIVERSITY
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