. . . . . . . . . . . . . "SDN:S04::S04271" . . "Ammonium analysis protocol described in Jones RD (1991) An improved fluorescence method for the determination of nanomolar concentrations of ammonium in natural seawaters. Limnol. Oceanogr. 36:814-819."@en . "1" . "2006-10-02 18:26:59.0" . "2006-10-02 18:26:59.0" . . "1" . . "false" . "SDN:S04::S04271" . "nanomolar ammonium system after Jones (1991)"@en . . . "" . "SDN:S04::S04271" . "accepted"@en . . .