Solid-Phase Spectrophotometric Analysis of 1-Naphthol Using Silica Functionalized with m-Diazophenylarsonic Acid

Table 4 Effect of possible interferes on the determination of 1-naphthol, t test (p = 0.95, n = 3) = 4.303. Added amount of 1-naphthol is 100 μg L⁻¹

Possible interferents	Molar relation of interfering reagent	1-Naphthol found, μg L⁻¹
Phenol	100	99 ± 9
Resorcinol	100	96 ± 10
Catechol	50	97 ± 12
2-Naphthol	1	105 ± 11
3-Aminobenzoic acid	1	154 ± 32
Diphenylamine	10	188 ± 15
4-Nitroaniline	100	141 ± 20