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Table 4 Analytical characteristics of the DLLME-FAAS method for copper determination

From: Determination of copper(II) by flame atomic absorption spectrometry after its perconcentration by a highly selective and environmentally friendly dispersive liquid–liquid microextraction technique

Parameter

Analytical feature

Sample consumption (mL)

10.0

Linear range (μg L− 1)

3.0–120

Regression eq. (C in μg mL−1, n = 9)

ΔA = 2.9003C + 1.8 × 10− 2

Limit of detection, μg L−1 (3σ)

0.60

Preconcentration factor

50

Enrichment factor

49

Precision (20.0 μg mL−1, n = 6) RSD (%)

1.5

Consumptive index (mL)

0.20

Recovery (%)

96–105