Solidified Floating Organic Drop Microextraction for the Detection of Trace Amount of Lead in Various Samples by Electrothermal Atomic Absorption Spectrometry

Table 4

Determination of Pb (II) ions in tap-water and river-water samples.

Sample	Added (Pb^2+) (µg L^−1)	Found (µg L^−1)	Recovery (%)
Tap water	0	—	—
	12.5	12.32 ± 0.03	98.56 ± 2
	15	14.77 ± 0.02	98.46 ± 2
	17.5	16.0 ± 0.01	91.42 ± 1
River water	0	—	—
	12.5	11.98 ± 0.01	95.84 ± 1
	15	14.74 ± 0.02	98.26 ± 2
	17.5	16.66 ± 0.01	95.20 ± 1