Home / Standards / GB/T 41965-2022 GB/T 41965-2022 Active Photography—Processing waste—Determination of total amino nitrogen (microdiffusion Kjeldahl method) 摄影 冲洗废液 氨态氮总含量的测定 (微扩散凯氏氮法) Standard Type GBT ICS 37.040.30;13.030.30 CCS G84 Status 现行 Issue Date 2022-12-30 Implementation 2023-07-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A