ONORM EN 25663:1993現(xiàn)行
Water Quality - Determination Of Kjeldahl Nitrogen - Method After Mineralization With Selenium
出版：Osterreichisches Normungsinstitut
專家解讀視頻
Specifies a method for the determination of nitrogen by a Kjeldahl-type method. Coverage includes reagents, apparatus, procedure, interferences and suggested procedure for removal of selenium from mineralisation residues.
NF EN 25663:1994 - Identical
I.S. EN 25663:1994 - Identical
NBN EN 25663:1994 - Identical
BS EN 25663:1993 - Identical
DIN EN 25663 (1993-11) - Identical
UNE EN 25663:1994 - Identical
SS EN 25663 Ed. 1 (1994) - Identical
ISO 5663:1984 - Identical
UNI EN 25663:1995 - Identical
