Synthesis of 6-(2-Methoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione as a New Reagent for Spectrophotometric Determination of Copper

Table 1

Effect of the solvent system on the absorbance value of Cu(II)-MNDTT complex (20 µg Cu(II)/mL).

Solvent	0.1 M NaOH	Acetonitrile	Methanol	Ethanol
𝜆max	476	482	475	479
Absorbance	0.05	0.108	0176	0143