The GB/T 603-2023 standard specifies the preparatory requirements for chemical reagents for preparations and articles used in test methods. This standard describes in detail the preparatory process of chemical reagents, ensuring the Reliability and conformity of the mass and performance of reagents used in the test. The standard covers the preparatory methods of different types of chemical reagents, including solid, liquid and gas reagents, as well as their storage and handling requirements before use in the laboratory. In addition, the standard also emphasizes the safe operating procedures that must be followed during the test, as well as specific techniques and precautions that may be involved in the reagent preparatory process. The implementation of the GB/T 603-2023 standard helps to improve the accuracy and repeatability of chemical reagents in laboratory applications.