A Novel Kinetic Spectrophotometric Method for the Determination of Dopamine in Biological and Pharmaceutical Samples

Table 2

Interfering effect of foreign species on the determination of 1.0 μg mL⁻¹ of dopamine.

Foreign species	Tolerance limit; (WSpecies/Wdopamine)
Li^+, Na^+, Mg^+2, NH4^+	1000
Ca^+2, K^+	950
Cu^+2	700
Fe^+2	670
Fe^+3	650
NO3^−, SO4^−2, CH3CO2^−, PO4^−3, H2PO4^−, CO3^−2	1000
Cl^−, NO2^−	10
Saccharose	900
Glucose, fructose	850
Ethanol, methanol	800
Urea	650
Uric acid	325
Ascorbic acid	5