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

From: Recent trends of copper detection in water samples

Types of reagents used to detect Cu(II) using the Spectrophotometry method The detection limit of Cu(II)
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