On February 28, AQSIQ and the National Standards Commission jointly issued seven national standards for nanomaterials. This is the first nanomaterial standard issued in the form of national standards in the world. The 7 standards will be implemented on April 1, 2005.
The seven criteria are: "Nano-Material Terminology" (GB/T19619-2004), "Determination of Nano-Powder Particle Size Distribution by X-ray Small Angle Scattering" (GB/T13221-2004), and "Gas Adsorption BET Method for Determination of Specific Surface Area of ​​Solid Substances". "(GB/T19587-2004), "Nano Nickel Powder" (GB/T19588-2004), "Nano-Zinc Oxide" (GB/T19589-2004), "Ultrafine Calcium Carbonate" (GB/T19590-2004) and " Nano-titanium dioxide (GB/T19591-2004).
The seven criteria are: "Nano-Material Terminology" (GB/T19619-2004), "Determination of Nano-Powder Particle Size Distribution by X-ray Small Angle Scattering" (GB/T13221-2004), and "Gas Adsorption BET Method for Determination of Specific Surface Area of ​​Solid Substances". "(GB/T19587-2004), "Nano Nickel Powder" (GB/T19588-2004), "Nano-Zinc Oxide" (GB/T19589-2004), "Ultrafine Calcium Carbonate" (GB/T19590-2004) and " Nano-titanium dioxide (GB/T19591-2004).