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

Table 3

Accuracy and precision data for determination of copper in one day (𝑛=3) and three subsequent days (𝑛=9).

Added (µg/mL)	Found (µg/mL)	CV%	Error%
Within-day (𝑛=3)
5.00	4.88±0.14	2.87	−2.40
10.00	10.14±0.13	1.28	1.40
17.50	17.43±0.06	0.34	−0.40
Between-day (𝑛=9)
5.00	4.89±0.18	3.68	−2.20
10.00	10.17±0.13	1.28	1.70
17.50	17.36±0.11	0.63	−0.80