Table 3 Types of reagents used in Cu(II) spectrophotometry detection method

4-amino-3-mercapto-6-[2-(2-thienyl) vinyl]-1,2,4-triazin-5(4H)-one (AMT)

0.011 µg mL⁻¹

azo-Schiff base 1-((4-(1-(2-hydroxyphenylimino) ethyl)-phenyl) diazenyl) naphthalene-2- ol (HPEDN)

1.7 to 5.4 g mL⁻¹

chloro (phenyl) glyoxime

10 µg L⁻¹

Cefixime in 1,4-dioxan-distilled water

3.19 × 10^–2 µg mL⁻¹

1-(2-pyridylazo)-2-naphthal

0.1–2.5 μg mL⁻¹

5-(4-nitrophenylazo) salicylic acid (NPAS) and 2,2’-Dipyridyl(Dp)

0.63–5.04 mg L⁻¹

polyethyleneimine (PEI)

566 nM

The sodium salt of 4-phenylsemicarbazone1,2-naphthoquinone-4-sulfon

0.012 mg L⁻¹