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Table 7 Addition/recovery data for water samples (sample volume: 50 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

Samples

Added (µg)

Found (µg)

Recovery (%)

Stream water (DeÄŸirmendere)

0

ND*

–

6.0

5.67 ± 0.23

94.5

12.0

11.9 ± 0.4

99.2

Stream water (HarÅŸit)

0

ND*

–

6.0

5.61 ± 0.13

93.5

12.0

10.9 ± 0.6

90.8

Sea water

0

ND*

–

6.0

5.55 ± 0.31

92.5

12.0

11.4 ± 0.7

95.0

  1. *Not detected