PET (polyethylene terephthalate) bottles do not typically contain bisphenol A (BPA). BPA is commonly found in polycarbonate plastics and epoxy resins, which are different materials from PET. PET is a type of plastic that is widely used for food and beverage packaging, including water bottles and soda bottles.
However, it's important to note that PET bottles can potentially leach other chemicals, such as antimony, into their contents under certain conditions. These conditions include high temperatures and extended storage time. Antimony is a substance that is used as a catalyst in the production of PET. The leaching of antimony from PET bottles is more likely to occur with repeated use or when bottles are exposed to high temperatures, such as when heated in a microwave oven.
Regarding the specific amount of BPA that would be released into the contents of a PET bottle when heated in a microwave oven, it's important to reiterate that PET bottles do not contain BPA. Therefore, no BPA would be released from a PET bottle when heated in a microwave.
If you have concerns about using PET bottles in the microwave, it is generally recommended to transfer the contents to a microwave-safe container before heating. This precaution helps ensure that no potentially harmful chemicals are leached into the food or beverage.