Journal of Analytical Methods in Chemistry / 2014 / Article / Tab 2

Research Article

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

Table 2

The FI of different concentration standard ammonium solution in existence and absence of EDTA.

Concentration of ammonium (, mol/L)FI in existence of EDTAFI in absence of EDTA

062.87174.994
0.125253.749235.408
0.250444.613414.782
0.375589.166551.247
0.500760.241690.585

The relationship between FI and FI = FI =

Corresponding parameters
0.9973 ( 0.0001)0.9970 ( 0.0001)
 The standard deviation of the intercept12.6511.90
 The standard deviation of the slope41.3238.87