Where is the most authoritative and cost effective non ferrous metal detection in China?

I learned that China Nonferrous Metals East China Quality Inspection Center is a very authoritative testing organization, formerly known as Shanghai Nonferrous Metals Research Institute, which can be verified, and their company is introduced as follows.

Shanghai Nonferrous Metals Industry Technology Monitoring Center (hereinafter referred to as the Monitoring Center) is a high-tech enterprise jointly funded by Beijing Nonferrous Metals Research Institute, Shanghai Nonferrous Metals Industry Association, and Shanghai Youxie Energy-saving Technology Assessment and Consulting, with analysis and testing services as the core.

At the same time, the monitoring center operates and manages the "China Nonferrous Metals Industry East China Product Quality Supervision and Inspection Center" and "China Nonferrous Metals Industry Nondestructive Testing Center", two verification and testing institutions with national certification qualifications, and is also the testing organization designated by the Shanghai ** Stock Exchange.

The main business involves third-party testing services (including metal material chemical composition testing, performance testing, environmental monitoring, non-destructive testing, etc.), equipment verification, testing and training, etc., and is a testing agency authorized by the National Industrial Product Production License Office of the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, and is the executive agency for the implementation of non-ferrous metal industry supervision in Shanghai, and one of the technical support units of the Shanghai Bureau of Quality and Technical Supervision.

Non-ferrous metal detection:

Non-ferrous metals refer to all metals except iron, chromium, and manganese. It has good comprehensive mechanical properties. So what standards should non-ferrous metal detection follow?

GB Import Environmental Protection Control Standard for Solid Waste that Can Be Used as Raw Materials - Waste Non-ferrous Metals.

GB 20664-2006 Natural Radioactivity Limits for Non-Ferrous Metal Mineral Products.

GB T 20902-2007 Requirements for the equipment and management of energy measuring instruments in non-ferrous metal smelting enterprises.

GB T 25953-2010 Non-ferrous metal beneficiation**Iron ore concentrate.

GB T Fasteners Mechanical Properties Bolts, screws, studs and nuts made of non-ferrous metals.

GB T Metals and other inorganic coatings Cleaning and preparation of metal surfaces Part 2: Non-ferrous metals and their alloys.

GB T General Technical Conditions for Heavy Machinery Part 5: Non-ferrous metal castings.

GB T 5125-2008 Test method for non-ferrous metal cupping.

GB T 8063-2017 Method for Representation of Cast Non-ferrous Metals and Their Composite Grades.

GB T Phillips Groove Countersunk Screws Part 2: Grade, Stainless Steel and Non-Ferrous Screws.

SN T Classification and Identification of Imported Solid Wastes that Can Be Used as Raw Materials Part 4: Waste Non-ferrous Metals.

YS T 1256-2018 Non-ferrous metal materials Specific heat capacity test Differential scanning calorimetry.

YS T 1257-2018 Non-ferrous metal materials -- Enthalpy test of melting and crystallization -- Differential scanning calorimetry.

YS T 1258-2018 Non-ferrous metal materials -- Melting and crystallization temperature test -- Thermal analysis methods.

National Nonferrous Metals and Electronic Materials Analysis and Testing Center.