Oxidised nitrogen (NOxeN)was calculated as the difference between total nitrogen (TN) and TKN. TNwas measured by means of a carbon analyzer (model 5050) with an additional total nitrogen measuring unit (model TNM-1) by Shimadzu Co Japan
Oxidised nitrogen (NOxeN)was calculated as the difference between total nitrogen (TN) and TKN.TNwas measured by means of a carbon analyzer (model 5050) with an additional total nitrogen measuring unit (model TNM-1) by Shimadzu Co Japan