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

Table 2

Analytical parameters of calibration curves of copper (II)-reagent (𝑛=9).

Parameters
Linearity	2.50–20.00 µg/mL
Limit of detection	0.33 µg/mL
Limit of quantification	1.10 µg/mL
Molar absorptivity	4350.5
Regression equation	𝑌=0.01286𝑥+0.01213
SD of slope	8.66 × 10^−5
RSD of slope	0.57
SD of intercept	3.60 × 10^−4
Coefficient correlation	0.992