BPA / Bisphenol A detection
What is BPA/ Bisphenol A
What does BPA mean?
The scientific name of bisphenol A is 2,2-bis(4-hydroxyphenyl)propane, also known as bisphenol propane, abbreviated as bisphenol propane, and the English name bisphenol A is abbreviated as BPA.
BPA is a white crystal that is flammable and has a slight phenol smell. Boiling point 250~252℃ (1.773kPa). The melting point is 150~156℃, the relative density is 1.195 (25℃), and the flash point is 79.4℃. BPA is soluble in ethanol, acetone, ether, benzene and dilute alkali, slightly soluble in carbon tetrachloride, and almost insoluble in water.
Bisphenol A is synthesized from phenol and acetone in acidic media. Bisphenol A is basically divided into polycarbonate grade and epoxy grade. As the main raw material, it is commonly used in epoxy resin, polycarbonate (PC plastic), etc. Resins, flame retardants and other products.
What does BPA free mean?
In the process of foreign trade, some products will be required to be BPA free by foreign customers. So what does BPA free mean? The word "free" in "BPA free" means "does not contain". Being asked for BPA free by a customer means that the customer requires the product to pass testing to prove that it does not contain BPA.
Dangers of BPA/Bisphenol A
American experimental researchers have discovered that bisphenol A (BPA), a chemical commonly found in plastic bottles, may cause cancer and other functional disorders.
In addition, bisphenol A (BPA) has been proposed to cause hormonal dysfunction in the human body, potentially causing harm to growth, development and reproduction.
In 2015, it was classified as a chemical known to cause female reproductive toxicity by the U.S. Developmental and Reproductive Toxicants Identification Committee (DARTIC).
Standard restrictions on BPA/bisphenol A in major countries
Some common bisphenol A testing standards in China:
GB 13116-91 Hygienic Standard for Polycarbonate Resin for Food Containers and Packaging Materials
GB 14942-94 Hygienic Standard for Polycarbonate Molded Products for Food Containers
and Packaging Materials GB/T 5009.99-2003 Hygienic Standard for Polycarbonate Resin for Food Containers and Packaging Materials Standard analysis method
China's health standards stipulate that the dissolution amount of phenol (distilled water, reflux for 6 hours) in carbonate resin and molded products should not exceed 0.05 mg/kg. The titration method is used to quantitatively calculate the free phenol in the solution.
GB/T 23296.16-2009 Determination of 2,2-di(4-hydroxyphenyl)propane (bisphenol A) in food contact materials polymeric material food simulants by high performance liquid chromatography GB/T29609-2013 Rubber phenol
and bisphenol Determination of phenol A
GB/T30939-2014 Determination of contaminant bisphenol A in cosmetics High performance liquid chromatography-tandem mass spectrometry
GB31604.10-2016 Food safety standard Food contact materials and products 2,2-bis(4-hydroxyphenyl ) Determination of the migration amount of propane (bisphenol A) (released)
GB/T 32889-2016 Determination of tetrabromobisphenol A in electronic and electrical products Gas chromatography-mass spectrometry
GB/T 34455-2017 Paper, cardboard and pulp 2, Determination of 2-bis(4-hydroxyphenyl)propane (bisphenol A) by liquid chromatography
Some EU bisphenol A testing standards :
European food grade regulations such as EU EU 10/2011 and German LFGB all stipulate that the migration limit of BPA/bisphenol A in plastic food contact materials is 3 mg/kg.
The European Union uses liquid chromatography to detect the migration of bisphenol A (the detection limit is 0.2 to 0.7 mg/kg).
Some U.S. bisphenol A testing standards :
The US food-grade FDA has proposed BPA/bisphenol A testing requirements for related food contact materials .
The California 65 standard in the United States requires that some related products such as food-grade PC plastics cannot contain BPA.
EPA (1993) stipulates that the maximum acceptable dose or reference dose is 0.05mg/kg.bw.
Japan:
The Food Hygiene Law stipulates that the dissolution limit of BPA/bisphenol A in polycarbonate food containers is 2.5 mg/kg.
BPA/bisphenol A detection
BPA testing currently mainly targets food-grade plastic products, mainly PC plastics and polyester resins. At the same time, more and more daily necessities made of related materials are subject to relevant testing requirements.
BPA/bisphenol A detection methods are mainly divided into BPA content detection and BPA dissolution detection. BPA content detection is to detect the BPA content of product types. BPA dissolution detection is usually a food-grade material immersed in a solution to detect the BPA dissolution of related materials. The amount of soaking liquid.