90.93 Standard confirmed Sep 3, 2023
CEN
CEN/TC 308 Characterization and management of sludge
European Norm
13.030.20 Liquid wastes. Sludge
This method describes a procedure for the determination of "Kjeldahl Nitrogen" in sludge and sludge products. The digestion is catalysed by selenium or copper, the temperature being raised by a high concentration of sodium sulphate. Although wet samples are normally taken for analysis, it is recognised practice to report results on a dry mass basis (g/kg). Consequently, it is also necessary to determine the dry residue of the homogenised sample used for analysis (see EN 12880).
PUBLISHED
EN 13342:2000
90.93
Standard confirmed
Sep 3, 2023