Non-destructive testing method for formaldehyde content of textiles

Abstract

The invention discloses a non-destructive testing method for formaldehyde content of textiles, which is characterized by comprising the following steps: (1) placing a to-be-tested whole textile in a sealed container, feeding air into the sealed container, sending gas containing a to-be-tested volatile-matter sample in the sealed container to an absorption container holding formaldehyde-absorbing solution and allowing the absorbing solution to absorb the gas from the sealed container; (2) continuing to feed air into the sealed container and send the gas in the sealed container into the absorbing solution for at least 30 minutes and then stopping the process that the water absorbs the gas; and (3) taking the absorbing solution obtained in a step (2) to perform formaldehyde qualitative identification or quantitative determination. The method can test the formaldehyde in the whole textile without damaging the textile, and can test the content of low-concentration formaldehyde in the textile.

Description

technical field [0001] The invention relates to a method for measuring formaldehyde content in textiles, in particular to a nondestructive detection method for formaldehyde content in textiles. Background technique [0002] Formaldehyde, also known as formaldehyde, is a colorless, highly irritating gas with a specific gravity of 1.06 to air and a boiling point of -19.5°C. It is easily soluble in water, alcohol and ether. Its aqueous solution is mostly a 35%-40% solution, which is volatile and can emit gaseous formaldehyde at room temperature, and the release speed is faster when heated. [0003] Formaldehyde can enter the human body through various routes, such as eating, breathing or skin contact. It can coagulate proteins and affect the genetics of organisms. It has been identified as a suspected carcinogenic and teratogenic substance by the World Health Organization. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, nasopharyngeal cance...

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Problems solved by technology

[0009] (1) Cause irreversible damage to textile products and cause waste: since the above method must take out a small sample from one or some parts of the original textile (such as clothing) for measurement, the object to be measured will be Causes damage such that it cannot be used after testing and must be discarded, thus creating waste

Especially for valuables with high value, every damaged textile is a great loss to the manufacturer

[0010] (2) Low-concentration formaldehyde that cannot be detected: the existing national standard method can only detect the concentration in the range of 20mg / kg to 3500mg / kg, if the concentration of formaldehyde in the small piece of textile sample taken is lower than 20mg / kg kg, it cannot be measured, resulting in the final result inconsistent with the actual

[0011] (3) The accuracy and reliability of the results are low: since the detection method is to take a small sample from a certain part or multiple parts of the textile for measurement, the measured formaldehyde content is only the local content of a certain part of the textile Or the average content of certain parts cannot represent the formaldehyde content level of the entire textile. If it is used to judge whether the formaldehyde content of a textile meets the national standard, its accuracy and reliability are very low.

[0012] (4) It can only be applied to the sampling inspection of batch textiles, not to the inspection of single textiles

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