Determination of Lead in Seawater by Flow-Injection On-line Preconcentration–Electrothermal Atomic Absorption Spectrometry after Coprecipitation with Iron(III) Hydroxide

Nakajima, Jun; Hirano, Yoshihiro; Oguma, Koichi

doi:10.2116/analsci.19.585

Cited by 37 publications

(13 citation statements)

References 31 publications

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“…Because of its high sensitivity, low cost and easy operation, graphite furnace atomic absorption spectrometry (GFAAS) has been frequently used for the determination of trace Cd in seawater [1][2][3]. To eliminate the matrix effects, several separation and preconcentration procedures have been proposed, based on solution-phase chelation followed by adsorption onto reversed-phase C 18 substrates [4][5][6], or retention on chelating resins or activated carbon [7][8][9], coprecipitation [10], cloud point extraction [11,12] and flow injection on-line preconcentration techniques [13,14].…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive determination of cadmium in seawater by hollow fiber supported liquid membrane extraction coupled with graphite furnace atomic absorption spectrometry

Peng

Liu

et al. 2007

Spectrochimica Acta Part B: Atomic Spectroscopy

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A new procedure, based on hollow fiber supported liquid membrane preconcentration coupled with graphite furnace atomic absorption spectrometry (GFAAS) detection, was developed for the determination of trace Cd in seawater samples. With 1-octanol that contained a mixture of dithizone (carrier) and oleic acid immobilized in the pores of the polypropylene hollow fiber as a liquid membrane, Cd was selectively extracted from water samples into 0.05 M HNO 3 that filled the lumen of the hollow fiber as a stripping solution. The main extraction related parameters were optimized, and the effects of salinity and some coexisting interferants were also evaluated. Under the optimum extraction conditions, an enrichment factor of 387 was obtained for a 100-mL sample solution. In combination with graphite furnace atomic absorption spectrometry, a very low detection limit (0.8 ng L − 1 ) and a relative standard deviation (2.5% at 50 ng L − 1 level) were achieved. Five seawater samples were analyzed by the proposed method without dilution, with detected Cd concentration in the range of 56.4-264.8 ng L − 1 and the relative spiked recoveries over 89%. For comparison, these samples were also analyzed by the Inductively Coupled Plasma Mass Spectrometry (ICP-MS) method after a 10-fold dilution for matrix effect elimination. Statistical analysis with a one-way ANOVA shows no significant differences (at 0.05 level) between the results obtained by the proposed and ICP-MS methods. Additionally, analysis of certified reference materials (GBW (E) 080040) shows good agreement with the certified value. These results indicate that this present method is very sensitive and reliable, and can effectively eliminate complex matrix interferences in seawater samples.

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Section: Introductionmentioning

confidence: 99%

Ultrasensitive determination of cadmium in seawater by hollow fiber supported liquid membrane extraction coupled with graphite furnace atomic absorption spectrometry

Peng

Liu

et al. 2007

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The on-line SPE could be hyphenated with spectrophotometry, 56,57 FAAS, 58,59 electrothermal atomic absorption spectrometry (ETAAS), 60,61 inductively coupled plasma-atomic emission spectrometry (ICP-AES) [62][63][64] and ICPmass spectrometry (ICP-MS) 65 for the sensitive and selective determination of metals. A highly sensitive spectrophotometric semi-automated methodology using FIA coupled with an on-line gas diffusion separation/ion exchange concentration was proposed for ammonium ion determination in seawater.…”

Section: Fia Methodsmentioning

confidence: 99%

Advancement of Flow-based Analysis with Alternative Chemical Reactions and New Devices for Environmental and Biological Samples

Sakai

Teshima

2008

ANAL. SCI.

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This review includes our researches and other methodologies related to flow-based techniques, such as flow injection analysis (FIA) and sequential injection analysis (SIA). The methods will demonstrate semi-and full automated FIA and SIA, including liquid-liquid and liquid-solid extraction. FIA using alternative chemical reactions in the aqueous solution was applied to the trace analysis of metals in biological and environmental samples. For durable liquid-liquid extraction, several phase separators were designed. Moreover, multi-channel FIA with newly designed flow cells and SIA with labon-valve devices have been used for the simultaneous and successive determination of metals and organic compounds. On-line solid phase extraction (SPE) has also been proposed for highly sensitive analysis of organic and inorganic compounds.

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“…The determination of lead(II) at parts per trillion levels in natural water samples using ETAAS requires a preliminary separation and preconcentration step to eliminate the matrix components, and to improve the detection limits. Several preconcentration methods have been used for trace lead(II) determinations; these include co-precipitation, 2,3 liquid-liquid extraction, [4][5][6][7] solid-phase extraction (SPE), [8][9][10][11][12][13][14][15][16][17] combination of co-precipitation and SPE, 18 combination of liquid-liquid extraction and SPE, 19 and cloud point extraction. 20 Research in this area has recently been reviewed; several different techniques have been outlined.…”

Section: Introductionmentioning

confidence: 99%

“…[39][40][41] A flow-injection on-line preconcentration system was also developed using a lead selective resin that was modified with an 18-crown 6-ether derivative, and a superior performance was obtained in the lead(II) determination using ETAAS. 18 In this study, we describe a new preconcentration technique based on the ion-pair solid-phase extraction of lead(II) to a small piece of hydrophilic polymer membrane filter for ultra-trace determination. The lead(II) complex with dicyclohexano-18-crown 6-ether (DC18C6) was extracted to a cellulose acetate-type membrane filter (2 × 5 mm) merely by vigorous eccentric stirring for 120 min under the coexistence of sodium dodecyl sulfate (SDS).…”

Section: Introductionmentioning

confidence: 99%

Ultra-Trace Determination of Lead(II) in Water Using Electrothermal Atomic Absorption Spectrometry after Preconcentration by Solid-Phase Extraction to a Small Piece of Cellulose Acetate Type Membrane Filter

et al. 2011

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Determination of Lead in Seawater by Flow-Injection On-line Preconcentration–Electrothermal Atomic Absorption Spectrometry after Coprecipitation with Iron(III) Hydroxide

Cited by 37 publications

References 31 publications

Ultrasensitive determination of cadmium in seawater by hollow fiber supported liquid membrane extraction coupled with graphite furnace atomic absorption spectrometry

Ultrasensitive determination of cadmium in seawater by hollow fiber supported liquid membrane extraction coupled with graphite furnace atomic absorption spectrometry

Advancement of Flow-based Analysis with Alternative Chemical Reactions and New Devices for Environmental and Biological Samples

Ultra-Trace Determination of Lead(II) in Water Using Electrothermal Atomic Absorption Spectrometry after Preconcentration by Solid-Phase Extraction to a Small Piece of Cellulose Acetate Type Membrane Filter

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