A Modified <i>o</i>-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer

<div>The spatial variation of ammonium concentration in Huajian River.</div>

Journal of Analytical Methods in Chemistry

Figure 6: A Modified <i>o</i>-Phthalaldehyde Fluorometric Analytical Method for Ultratrace Ammonium in Natural Waters Using EDTA-NaOH as Buffer 