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

Table 4

Application of the proposed method to the determination of Cu(II) in amalgam (𝑛=3).

Compound	Label claimed (mg)	Found (mean ± sd)		Statistical tests*
		Proposed method	A. A. method
110-plus	10.00	9.75±0.07	9.66±0.10	𝑡=0.265	𝐹=0.647

∗Theoretical values of 𝑡 and 𝐹 at 𝑃=0.05 and 95% confidence are 2.776 and 6.388, respectively.