Gas chromatography identifies excessive formamide in household products, detecting "toxic mats".
Nowadays, with economic development, changes in people's living needs, and the rise of the e-commerce industry, a variety of new household products are emerging online. Among them, children's furniture items marketed under labels such as "educational," "protective," and "eco-friendly" are especially sought after by most parents. Children's play mats, in particular, have become a popular household item due to their ability to prevent injuries, ease of cleaning, and convenient storage.
However, as a parenting product that has long maintained high sales and popularity, its safety is also a matter of concern. It is not difficult to see that in many news reports, excessive formamide levels have consistently been a major safety hazard in children's floor mats. In 2015, Jiangsu Province released a quality inspection report on children's play mats, which showed that over 40% of the samples had safety risks, with excessive formamide being one of the main concerns. In 2018, the Huangpu District Market Supervision and Administration Bureau in Shanghai conducted another quality抽查 of children's mats, in which nearly half of the samples exceeded the allowable formamide limits.
It is known that formamide is a colorless, transparent liquid compound with a wide range of applications, including the synthesis of pharmaceuticals, fragrances, dyes, synthetic fibers, and plastics. However, it is also a toxic substance with carcinogenic potential. It can irritate the skin, eyes, mucous membranes, and upper respiratory tract, and in severe cases, may even induce leukemia. Additionally, formamide is a reproductive toxicant, and the harm it causes to children is irreversible.
As early as 2014, the Taiwan Bureau of Standards, Metrology and Inspection classified formamide as a toxic chemical substance subject to mandatory inspection and prohibited its use in the production of children's toys and products. The European Chemicals Agency also long ago stipulated that the formamide content in children's play mats should not exceed 200 mg/kg. However, in China, the production, manufacturing, and testing of children's mats follow toy safety standards, which do not mandate formamide testing. Some unscrupulous companies, in order to make mats lighter, thinner, and more flexible, use large amounts of foaming agents during production, resulting in persistently high levels of formamide residue in children's mats, posing a serious threat to the safety of young children in China. Therefore, strengthening the inspection and regulation of children's furniture and products such as mats is an urgent and important task.
Currently, the most common methods for formamide detection are gas chromatography and gas chromatography-mass spectrometry. Gas chromatographs use chromatographic separation and detection techniques to qualitatively and quantitatively analyze complex mixtures with multiple components. They offer advantages such as high separation efficiency, fast analysis speed, high sensitivity, low sample consumption, and good selectivity. These instruments can not only separate and analyze various gases and volatile organic substances but also analyze high-boiling-point substances and solid samples, meeting the detection requirements for formamide in mat products. In addition, liquid chromatography, which uses a liquid mobile phase, is also a common method for formamide detection.
