氨氮标准曲线水质氨氮纳氏试剂光度法标准曲线标准溶液测试标液体积(ml)氨氮含量(mg)吸光度空白吸光度校正吸光度00.0000.0280.0280.0000.50.0050.0550.0280.0271.00.0100.0690.0280.0413.00.0300.1390.0280.1117.00.0700.2750.0280.24710.00.1000.3860.0280.358水样测试空白吸光度0.053氨氮含量mg0.121水样吸光度0.483水样体积ml5校正吸光度0.430氨氮mg/L24.21...