Home / Standards / GB/Z 42520-2023 GB/Z 42520-2023 Active Guidelines for X-ray fluorescence spectrometric laboratory practice for the analysis of iron ores 铁矿石X射线荧光光谱分析实验室操作指南 Standard Type GBZ ICS 73.060.10 CCS D31 Status 现行 Issue Date 2023-05-23 Implementation N/A Responsible Dept 中国钢铁工业协会 Drafting Unit N/A