Table 4 Reproducibility of the suggested sensor.

From: Characterization of a simple potentiometric graphite based sensor and its effective applicability in sensitive and selective determination of Cu(II) ion in vegetable foliar, real water and pharmaceutical samples

Taken (mg

ml−1)

Intra-day

Inter-day

Found (mg ml−1)

Recovery %

SD*

RSD %

Found (mg ml−1)

Recovery %

SD*

RSD %

0.635 × 10−3

0.606 × 10−3

95.43

1.14 × 10−6

1.23

0.622 × 10−3

97.95

4.04 × 10−7

2.12

6.35 × 10−3

5.90 × 10−3

92.91

1.48 × 10−5

2.08

6.500 × 10−3

102.36

5.77 × 10−6

1.15

63.5 × 10−3

64.10 × 10−3

100.94

7.4 × 10−5

1.75

64.70 × 10−3

101.89

6.43 × 10−5

0.94

  1. *SD of 6 replicates.
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