GB/T 35861-2024 "General mass requirements and Measurement traceability of gas mixtures for gas analysis calibrate" specifies the general mass assurance requirements for the preparation of calibrate mixtures with Stability and Comparability, and establishes procedures for verifying the composition of such mixtures to ensure their accuracy within specified measurement uncertainties. This document provides guidance on uncertainty assessment, describes the use of traceable standard gas mixtures to calibrate the composition of unknown calibrate mixtures, and describes the mass management system used by manufacturers of calibrate mixtures. Validation of the preparation and composition of gas mixtures for calibrating equipment and methods, measurement procedures and equipment performance evaluation.