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Table 9 Cd(II) levels of real samples (eggplant, lettuce, parsley, apple, and apricot amount: 0.750 g, sea and stream water volume: 500 mL, final volume: 5.0 mL)

From: Insights into brewed tea waste as a green and low-priced adsorbent for solid-phase extraction of Cd(II) ions: isotherm, kinetic, and artificial neural network approach

Water samples

Cd(II) conc. (µg L−1)

Stream water (DeÄŸirmendere)

1.76 ± 0.28

Stream water (HarÅŸit)

0.81 ± 0.08

Sea water

0.37 ± 0.04

Solid samples

Cd(II) conc. (µg g−1)

Eggplant

0.97 ± 0.03

Lettuce

0.37 ± 0.01

Parsley

0.83 ± 0.01

Apple

3.27 ± 0.07

Apricot

0.25 ± 0.02