Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction

高等学校化学研究 ›› 2011, Vol. 27 ›› Issue (3): 366-370.

Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction

SHAH Syed Mazhar¹, WANG Hao-nan² and SU Xing-guang^1*

1. College of Chemistry,
2. College of Environment and Resources, Jilin University, Changchun 130012, P. R. China

收稿日期:2010-10-18 修回日期:2010-12-30 出版日期:2011-05-25 发布日期:2011-04-29
通讯作者: SU Xing-guang E-mail:suxg@jlu.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(No.20075009).

Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction

SHAH Syed Mazhar¹, WANG Hao-nan² and SU Xing-guang^1*

1. College of Chemistry,
2. College of Environment and Resources, Jilin University, Changchun 130012, P. R. China

Received:2010-10-18 Revised:2010-12-30 Online:2011-05-25 Published:2011-04-29
Contact: SU Xing-guang E-mail:suxg@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.20075009).

摘要/Abstract

摘要： A new method based on the cloud point extraction(CPE) for separation and preconcentration of nickel(II) and its subsequent determination by graphite furnace atomic absorption spectrometry(GFAAS) was proposed, 8-hydroxyquinoline and Triton X-100 were used as the ligand and surfactant respectively. Nickel(II) can form a hydrophobic complex with 8-hydroxyquinoline, the complex can be extracted into the small volume surfactant rich phase at the cloud point temperature(CPT) for GFAAS determination. The factors affecting the cloud point extraction, such as pH, ligand concentration, surfactant concentration, and the incubation time were optimized. Under the optimal conditions, a detection limit of 12 ng/L and a relative standard deviation(RSD) of 2.9% were obtained for Ni(II) determination. The enrichment factor was found to be 25. The proposed method was successfully applied to the determination of nickel(II) in certified reference material and different types of water samples and the recovery was in a range of 95%―103%.

关键词: Cloud point extraction, Phase separation, Graphite furnace atomic absorption spectrometry, Nickel(II)

Abstract: A new method based on the cloud point extraction(CPE) for separation and preconcentration of nickel(II) and its subsequent determination by graphite furnace atomic absorption spectrometry(GFAAS) was proposed, 8-hydroxyquinoline and Triton X-100 were used as the ligand and surfactant respectively. Nickel(II) can form a hydrophobic complex with 8-hydroxyquinoline, the complex can be extracted into the small volume surfactant rich phase at the cloud point temperature(CPT) for GFAAS determination. The factors affecting the cloud point extraction, such as pH, ligand concentration, surfactant concentration, and the incubation time were optimized. Under the optimal conditions, a detection limit of 12 ng/L and a relative standard deviation(RSD) of 2.9% were obtained for Ni(II) determination. The enrichment factor was found to be 25. The proposed method was successfully applied to the determination of nickel(II) in certified reference material and different types of water samples and the recovery was in a range of 95%―103%.

Key words: Cloud point extraction, Phase separation, Graphite furnace atomic absorption spectrometry, Nickel(II)

SHAH Syed Mazhar, WANG Hao-nan and SU Xing-guang*. Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction[J]. 高等学校化学研究, 2011, 27(3): 366-370.

参考文献

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Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction

Determination of Trace Amounts of Nickel(II) by Graphite Furnace Atomic Absorption Spectrometry Coupled with Cloud Point Extraction

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