Home / Standards / GB/T 14668-93 GB/T 14668-93 Air quality—Determination of ammonia—Nessler's reagent colorimetric method 空气质量 氨的测定 纳氏试剂比色法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A