A Method to Determination of Lead Ions in Aqueous Samples: Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction Method Based on Solidification of Floating Organic Drop and Back-Extraction Followed by FAAS

Table 3

Determination of lead ions in several water samples ().

Sample	Added (μg·L^−1)	Found (μg·L^−1)	Recovery %
Tap water	0	0	—
	25.0	24.1 ± 0.9	96.4
	50.0	48.6 ± 1.3	97.2
	100.0	98.1 ± 1.9	98.1
Lake water	0	7.6 ± 0.2	—
	25.0	31.9 ± 1.1	97.8
	50.0	56.1 ± 1.4	97.4
	100.0	106.2 ± 1.8	98.7