GB/T 7991.10-2024 is Part 10 of the series of standards for testing vitreous and porcelain enamel coatings. It specifies the test methods and limits for the release of heavy metal ions from vitreous and porcelain enamel coatings on equipment used for the production and storage of food. The standard applies to the detection of 16 heavy metal ions, including aluminum, silver, arsenic, lead, and cadmium. It involves extracting heavy metal ions released from test samples under specific test conditions, with the core purpose of determining whether they meet safety limit requirements. The testing requires precision instruments such as inductively coupled plasma mass spectrometers or atomic absorption spectrophotometers, along with sample preparation devices and constant temperature equipment. This standard provides a unified technical basis for quality control and food safety assurance of vitreous and porcelain enamel equipment in contact with food.