Table 1 Summary of conducted studies on Cu detection by AAS in water samples

GFAAS

Seawater

0.3–0.4 µg L⁻¹

0.07 µg L⁻¹

Huang and Shih (1993)

FAAS

Wastewater

4 ppb

Khayatian et al. (2018)

FAAS

Samples were prepared by solid-phase extraction

River and sewage water

ng mL⁻¹

Taylor et al. (2020)

FAAS

Samples were prepared by highly selective dispersive liquid–liquid microextraction

Water/food samples

0.60 μg L⁻¹

Bagherian et al. (2019)

FAAS

Water samples spiked with Cu

With different atomic lines at 324.754 nm, 249.215 nm, and 224.426 nm, detection limits were 21, 310, and 1400 µg L⁻¹, respectively

Lima et al. (2010)

FAAS

1.5 µg L⁻¹

Lemos et al. (2007)

FAAS

Samples were prepared by cloud-point preconcentration

Seawater and river

0.04 µg L⁻¹

Goudarzi (2007)

FAAS

Samples were prepared by

dispersive liquid–liquid micro-extraction-slotted quartz tube (DLLME-SQT)

Wastewater, tap, and seawater

0.67 µg L⁻¹

Özzeybek et al. (2017)