The reporter learned from the State Administration for Market Regulation that in 2024, China approved 1135 new national standard substances, an increase of 51.9% over the previous year, and the total number exceeded 18000 for the first time, providing strong support for ensuring that various fields can be measured accurately. From the perspective of distribution fields, the proportion of primary standard substance food and secondary standard substance environmental categories is relatively large. In 2024, 83 new national first-class standard substances were approved, an increase of 22.1% over the previous year. Among them, there are 45 food standard substances, accounting for 54.2%. Approved the construction of 1052 new national secondary standard substances, an increase of 54.9% over the previous year. Among them, there are 578 environmental standard substances, accounting for 54.9%. The newly established national first-class standard substances for food in 2024 are applied to the detection of veterinary drug residues, genetically modified corn, heavy metals in vegetables and grains, etc., to meet the high accuracy and technical difficulty requirements of standard substance application in the field of food testing, and to support China's food safety supervision work; The national first-class standard substances for chemical environment are mainly aimed at greenhouse gas emissions, environmental monitoring, and other aspects. Among them, gas standard substances that meet the requirements of high-precision carbon monitoring provide a high-precision "ruler" for national carbon monitoring; The physical and chemical characteristics and engineering technology standard materials are mainly aimed at precision manufacturing and energy performance related testing, providing measurement standards with traceability assurance for China's precision manufacturing and crude oil cetane number and viscosity value. It is reported that among the 83 approved national first-class standard substances, 55 were developed by scientific research institutions, accounting for 66.3%. Among the approved national secondary standard substances, 153 have been developed by scientific research institutions, accounting for 14.5%; 899 enterprise R&D projects, accounting for 85.5%. (New Society)