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Method for detecting content of formamide in product

A detection method, formamide technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems affecting the accuracy of formamide, difficult to achieve long-term storage, poor stability of standard products, etc., to achieve simple and fast operation, reduce Effect of loss, low detection limit

Active Publication Date: 2021-07-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional extraction solvents include acetone, methanol, ethanol, ethyl acetate, etc. However, it is difficult for the above extraction solvents to fully enrich the formamide in the sample, which affects the accuracy of the detection of formamide in artificial leather and foamed products
In addition, the above-mentioned detection method needs to prepare formamide standard substance. If the above-mentioned extraction solvent is used to prepare formamide standard substance, the stability of the standard substance is not good, and it is difficult to achieve long-term storage.

Method used

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  • Method for detecting content of formamide in product
  • Method for detecting content of formamide in product
  • Method for detecting content of formamide in product

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment one (about the detection of artificial leather product)

[0052] The present embodiment provides a kind of detection method to the formamide residual content in the artificial leather product, and it comprises the steps:

[0053] (1), after pulverizing the artificial leather product, extract it in an acetonitrile solution (as an extraction solvent) to obtain an extract;

[0054] (2), filter extract, obtain filtrate;

[0055] (3), adopt high performance liquid chromatography to detect the content of the formamide in the filtrate.

[0056] Wherein, in step (1), the artificial leather product is shredded into fragments with a particle size of about 2-3mm, accurately weighed 1.000g (accurate to 3 decimal places), and then placed in a 10mL volumetric flask with a stopper .

[0057] In step (1), add 10 mL of pure acetonitrile solution into the above-mentioned 10 mL volumetric flask, stopper the bottle tightly, and place it in an ultrasonic generator for extracti...

Embodiment 2

[0061] Embodiment two (detection about rubber and plastic insulation material)

[0062] This embodiment provides a method for detecting residual formamide content in rubber and plastic insulation materials, which includes the following steps:

[0063] (1), after pulverizing the rubber-plastic insulation material, extract it in an acetonitrile solution to obtain an extract;

[0064] (2), filter extract, obtain filtrate;

[0065] (3), adopt high performance liquid chromatography to detect the content of the formamide in the filtrate.

[0066] Wherein, in step (1), the rubber-plastic insulation material contains nitrile rubber (NBR). The rubber and plastic insulation material is cut into fragments with a particle size of about 2-3mm, accurately weighed 1.000g (accurate to 3 decimal places), and then placed in a 10mL volumetric flask with a stopper.

[0067] In step (1), add 10 mL of pure acetonitrile solution into the above-mentioned 10 mL volumetric flask, stopper the bottle ...

Embodiment 3

[0071] Embodiment 3 (detection about yoga mat)

[0072] The present embodiment provides a kind of detection method to formamide residual content in yoga mat, and it comprises the steps:

[0073] (1), after the yoga mat is pulverized, extract in an acetonitrile solution to obtain an extract;

[0074] (2), filter extract, obtain filtrate;

[0075] (3), adopt high performance liquid chromatography to detect the content of the formamide in the filtrate.

[0076] Wherein, in step (1), the yoga mat contains nitrile rubber (NBR). The yoga mat is cut into fragments with a particle size of about 2-3mm, accurately weighed 1.000g (accurate to 3 decimal places), and then placed in a 10mL volumetric flask with a stopper.

[0077] In step (1), add 10 mL of pure acetonitrile solution into the above-mentioned 10 mL volumetric flask, stopper the bottle tightly, and place it in an ultrasonic generator for extraction at room temperature in a water bath for 1 h to obtain the extract as the sol...

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Abstract

The invention provides a method for detecting the content of formamide in a product. The method comprises the following steps: crushing the product, extracting in a nitrile solution, filtering, and detecting the content of the formamide in the product by adopting a high performance liquid chromatography. According to the method, the nitrile solution is used as the extraction solvent to extract the formamide in the product, and water and acetonitrile are used as mobile phases when the high performance liquid chromatography is used for detection, so that the loss of the formamide in the extraction process and the detection process can be reduced, and the method has the advantages of high extraction efficiency, high detection precision and high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of formamide content detection, and in particular relates to a detection method for formamide content in products. Background technique [0002] In the production of artificial leather and related foam products, formamide is often used as a foaming agent to increase the flexibility of the product, thereby effectively preventing product breakage and reducing production costs. However, formamide (also known as amino formaldehyde, Formamide) is likely to remain in products, and it is a toxic and harmful substance that is likely to cause allergic reactions and may have a potentially serious impact on human health. For example, formamide is irritating to the eyes and skin to a certain extent, and it is also harmful to health after inhalation. If the human body is exposed to formamide for a long time, it will also affect the central nervous system, and has teratogenic, carcinogenic and reproductive toxicity. The...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 倪力军侯焕瑶张立国栾绍嵘
Owner EAST CHINA UNIV OF SCI & TECH
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