Applicability of a magnetic bucky gel for microextraction of mercury from complicated matrices followed by cold vapor atomic absorption spectroscopy

Figures & data

Figure 1. (A) IL and MGO mixed in a mortar for synthesis of the magnetic bucky gel. (B) TEM image of the magnetic bucky gel.

Figure 2. FT-IR spectrum of the magnetic bucky gel.

Figure 3. The effect of pH (A), sorbent amount (B), extraction times (C), and the ratio of IL/MGO (D) on the extraction recovery of Hg-DTZ.

Figure 4. The effect of eluent type (A), and desorption time (B) on the desorption process.

Table 1. Comparison of the presented method with some other reported methods for determination of mercury ions in different samples.

Matrix	Analytical method^a	Sample Preparation method	RSD%	LOD	Linearity (µg L^−1)	Ref
Aqueous samples	HPLC-DAD	IL-Single-drop-ME	11.6 (n = 8)	22.8 µg L^−1	80–480	^[Citation23]
Omega-3	CV/HG-AAS	Digestion method	NR^b	0.183–6.42 µg g^−1	NR	^[Citation43]
Liquid cosmetics	HPLC-ICP-MS	IL-DLLME	7.4 (n = 10)	1.3 × 10 ^−3 µg L^−1	2–40	^[Citation47]
River water, cow milk, omega 3, lipstick	CV -AAS	Magnetic-DSPME	3.6–25% (n = 3)	0.57 µg L^−1	1–200	Present work

^aHPLC-DAD: high performance liquid chromatography with a photodiode array detector, CV/HG AAS: cold vapor hydride generation atomic absorption spectroscopy, ICP-MS: inductively coupled plasma mass spectroscopy, HPLC-ICP-MS: high performance liquid chromatography inductively coupled plasma mass spectroscopy,

^bNR: Not reported

Table 2. Determination of mercury in different samples using the proposed method.

Samples	Creal ± SD^a	Cadded	Ctotal ± SD^a	^bRR%
Milk	n.f ^a	20 µg L^−1	19.50 µg L^−1 ± 1.8	97
		40 µg L^−1	41.66 µg L^−1 ± 3.5	104
River water	n.f	20 µg L^−1	20.8 µg L^−1 ± 0.76	104
		40 µg L^−1	42.3 µg L^−1 ± 1.76	105
Omega-3 capsule (w = 1.2 g)	0.2 µg g ^−1 ± 0.03	1 µg g^−1	1.16 µg g^−1 ± 0.3	96
		3 µg g^−1	2.98 µg g ^−1 ± 0.7	93
Lipstick (w = 2 g)	1.0 µg g^−1 ± 0.26	1 µg g^−1	1.86 µg g ^−1 ± 0.4	86
		2 µg g^−1	2.9 µg g ^−1 ± 0.6	95

^aStandard deviation for three replicates

^bRelative recovery

^aNot found

Pena-Pereira, F.; Lavilla, I.; Bendicho, C.; Vidal, L.; Canals, A. (2009) Speciation of mercury by ionic liquid-based single-drop microextraction combined with high-performance liquid chromatography-photodiode array detection. Talanta, 78 (2): 537–541. doi:10.1016/j.talanta.2008.12.003.

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