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A kind of preparation method of nanometer material that absorbs and detects iron ion in food

A nanomaterial, iron ion technology, applied in the preparation of test samples, chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult conventional analysis, difficult direct measurement, complicated operation, etc., and achieve a wide range of application value. and economic value, the preparation method is simple, and the sensitivity is high.

Active Publication Date: 2017-06-16
云南商测质量检验技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Modern analytical techniques and analytical instruments are also constantly developing, and the detection limit of elements has been greatly reduced. However, in the analysis of some low-concentration heavy metals, a large number of coexisting interferences make direct determination difficult.
And the operation is more complex, expensive and time-consuming, so it is difficult to achieve routine analysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Nanomaterial SiO for adsorption and detection of iron ions in food 2 The preparation method of -catechol specifically comprises the following steps:

[0027] (1) Weigh nano-silica (30nm) into the ethanol solution according to the liquid-solid ratio of 40:1, and then add 3-aminopropyltriethoxysilane, Deionized water and ammonia water were refluxed at 40°C for 9h, then centrifuged at 3000r / min, the solid matter was taken out and dried at 40°C for 24h, and the obtained product was marked as SiO 2 -NH 2 ; Wherein, the volume ratio of 3-aminopropyltriethoxysilane and ethanol solution is 1:15, the volume ratio of deionized water and ethanol solution is 1:25, and the volume ratio of ammonia water and ethanol solution is 1:30;

[0028] (2) Dilute the SiO obtained in step (1) according to the liquid-solid ratio of 60:1 2 -NH 2 Add it into ethanol to obtain a mixed solution, then weigh 3,4-dihydroxybenzaldehyde 0.5 times the mass of nano-silica, add it to the mixed solution, ...

Embodiment 2

[0034] Nanomaterial SiO for adsorption and detection of iron ions in food 2The preparation method of -catechol specifically comprises the following steps:

[0035] (1) Weigh nano-silica (40nm) into the ethanol solution according to the liquid-solid ratio of 50:1, and then add 3-aminopropyltriethoxysilane, Deionized water and ammonia water were refluxed at 40°C for 8h, then centrifuged at 3500r / min, the solid matter was taken out and dried at 40°C for 24h, and the obtained product was marked as SiO 2 -NH 2 ; Wherein, the volume ratio of 3-aminopropyltriethoxysilane and ethanol solution is 1:17, the volume ratio of deionized water and ethanol solution is 1:15, and the volume ratio of ammonia water and ethanol solution is 1:35;

[0036] (2) The SiO obtained in step (1) was mixed according to the liquid-solid ratio of 55:1 2 -NH 2 Add it into ethanol to obtain a mixed solution, then weigh 3,4-dihydroxybenzaldehyde, which is 1 times the mass of nano-silica, add it to the mixed ...

Embodiment 3

[0042] Nanomaterial SiO for adsorption and detection of iron ions in food 2 The preparation method of -catechol specifically comprises the following steps:

[0043] (1) Weigh nano-silica (50nm) into the ethanol solution according to the liquid-solid ratio of 60:1, and then add 3-aminopropyltriethoxysilane, Deionized water and ammonia water were refluxed at 40°C for 10h, then centrifuged at 4000r / min, the solid matter was taken out and dried at 40°C for 24h, and the obtained product was marked as SiO 2 -NH 2 ; Wherein, the volume ratio of 3-aminopropyltriethoxysilane and ethanol solution is 1:20, the volume ratio of deionized water and ethanol solution is 1:20, and the volume ratio of ammonia water and ethanol solution is 1:40;

[0044] (2) According to the liquid-solid ratio of 50:1, the SiO obtained in step (1) 2 -NH 2 Add it into ethanol to obtain a mixed solution, then weigh 3,4-dihydroxybenzaldehyde, which is 1.5 times the mass of nano-silica, add it to the mixed solut...

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Abstract

The invention discloses a preparation method of a nanometer material adsorbing and detecting iron ions in foods and belongs to the technical field of detection and adsorption of Fe3 +. The preparation method comprises the steps that nano silicon dioxide is put into ethanol, then 3-amino propyl triethoxy silane, deionized water and ammonia water are added, a product obtained after reflux reaction is marked as SiO2-NH2; then the obtained SiO2-NH2 is put into the ethanol, 3,4-dihydroxy benzaldehyde is added and stirred, and then reflux reaction is performed under the condition of 50 DEG C; the nanometer silica material is obtained after the obtained product is rapidly centrifuged and dried. The nanometer material prepared by means of the preparation method can quickly detect out Fe3 + in foods, is high in Fe3 + adsorption rate and sensitivity and can be recycled.

Description

technical field [0001] The invention discloses a preparation method of a nano-material for absorbing and detecting iron ions in food, which belongs to Fe 3+ The field of detection and adsorption technology. Background technique [0002] Iron is an extremely important component of human and animal body tissues and blood, and is the most essential trace element in the human body, accounting for about 0.006% of the total weight of the human body. Iron is not only necessary for blood exchange and transport of oxygen in the human body, but also an indispensable element for certain enzymes and many redox systems. It plays an important role in biocatalysis, electron transfer on the respiratory chain, etc. Iron deficiency may affect the normal functions of the body's functional systems, such as impairing the bactericidal ability of phagocytes and reducing the body's immunity. But because iron is an active metal, too much iron can also cause damage to the body, such as abnormal me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30G01N1/28
Inventor 李丽蓉刘入源
Owner 云南商测质量检验技术服务有限公司