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Test method for formaldehyde and aniline of chromium-free leather

An inspection method, chrome leather technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as no product standard system

Active Publication Date: 2016-01-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since there are many ways to manufacture chrome-free tanning, and various chrome-free leather products have different performances, there is no complete and general product standard system at home and abroad to rely on.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The detection method of formaldehyde and aniline in the use process of chrome-free tanned children's shoes leather part

[0018] (1) Sampling of chrome-free leather for children's shoes, using vegetable tanning agent - glutaraldehyde, sampling 20g;

[0019] (2) Soak the sample with artificially simulated alkaline sweat 2 to 5 times the weight of the sample for 20 minutes, take out the sample after soaking, and dry at 50°C until the water content is 16% to 18%; the preparation of artificially simulated alkaline sweat refers to OB / T2464.23-99;

[0020] (3) Use a sun aging box for treatment, the parameters are RH60%, the temperature of the blackboard is 50°C, and the radiation amount is 1.0MJ / m 2 process;

[0021] (4) Put the sample after aging treatment in the sun into a 500mL conical flask, add a reducing alkaline aqueous solution 50 times the weight of the sample, and extract it on a cradle at 80r / min for 60min at 30°C; the reducing alkaline aqueous soluti...

Embodiment 2

[0023] Example 2: The detection method of formaldehyde and aniline in the use process of chrome-free tanned shoe lining

[0024] (1) Sampling 20g of chrome-free tanned shoe inner leather, vegetable tanning agent-aromatic syntan, vegetable tanning agent-oxazolidine used in this material;

[0025] (2) Soak the obtained chromium-free leather sample with artificially simulated alkaline sweat 2 to 5 times the weight of the sample for 20 minutes, take out the sample after soaking, and dry at 50°C until the moisture content is 16% to 18%. The perspiration preparation refers to OB / T2464.23-99;

[0026] (3) Use a sun aging box for treatment, the parameters are RH90%, the temperature of the blackboard is 40°C, and the radiation amount is 1.0MJ / m 2 process;

[0027] (4) Put the sample after the sun aging treatment into a 500mL conical flask, add a reducing alkaline aqueous solution 50 times the sample weight, and extract it on a cradle at 60r / min for 60min at 30°C; The aqueous solutio...

Embodiment 3

[0029] Embodiment 3: the detection method of formaldehyde and aniline in the use process of chrome-free tanned visor leather

[0030] (1) Sampling 20g of chrome-free tanned shoe inner leather, which uses vegetable tanning agent-glutaraldehyde;

[0031] (2) Soak the obtained chromium-free leather sample with artificially simulated alkaline sweat 5 times the weight of the sample for 20 minutes; take out the sample after soaking, and dry it at 50°C until the water content is 16% to 18%; artificially simulated alkaline sweat preparation Refer to OB / T2464.23-99;

[0032] (3) Use a sun aging box for treatment, the parameters are RH90%, the temperature of the blackboard is 37°C, and the radiation amount is ~1.32MJ / m 2 process;

[0033] (4) Put the sample after the sun aging treatment into a 500mL conical flask, add a reducing alkaline aqueous solution 50 times the sample weight, and extract it on a cradle at 60r / min for 60min at 30°C; The aqueous solution is a sodium sulfite solut...

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Abstract

The invention relates to a product toxicant detection method and in particular relates to a method for testing formaldehyde and aniline of a chromium-free leather. The method comprises the following steps: sampling the chromium-free leather; preprocessing the sample by use of simulated human alkaline sweat and performing aging treatment on the sample in an insolation aging box; extracting in a reducing alkaline aqueous solution and performing solvent extraction on the extract liquid; and testing the content of formaldehyde and the content of aniline in the water phase and the solvent phase after extraction, respectively. The method is capable of testing formaldehyde and aniline of the leather products manufactured by use of a third-class chromium-free tanning method and by simulating a leather use condition of contacting with the skin, and finally, the final safety discrimination can be obtained according to the analysis of the content of extracted formaldehyde and aniline.

Description

technical field [0001] The invention relates to a method for detecting toxic substances in products, in particular to a method for detecting formaldehyde and aniline in chrome-free leather. Background technique [0002] Because there are many ways to manufacture chrome-free tanning, and various chrome-free leather products have different properties, there is no complete and general product standard system at home and abroad. Leather raw materials before manufacture of goods from chrome-free leather goods, chrome-free leather WIP or chrome-free leather. These leathers will be used in the manufacture of various gloves, belts, shoe linings, hat brims and other products that come into contact with the skin. According to the manufacturing characteristics of chrome-free tanned leather samples currently recognized in the market, chrome-free leather mainly comes from combined tanning such as vegetable tanning agent-glutaraldehyde, vegetable tanning agent-oxazolidine, and vegetable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 单志华杨萌李瑞李伟朱洪亮杨茂
Owner SICHUAN UNIV