硫代乙酰胺键合硅胶在线选择性固相萃取火焰原子吸收测定环境样品中痕量铜

引用本文: 谢发之, 张峰君, 宣寒, 葛业君, 王颖. 硫代乙酰胺键合硅胶在线选择性固相萃取火焰原子吸收测定环境样品中痕量铜[J]. 分析化学, 2012, 40(11): 1720-1724. doi: 10.3724/SP.J.1096.2012.20218 shu

Citation: XIE Fa-Zhi, ZHANG Feng-Jun, XUAN Han, GE Ye-Jun, WANG Ying. Determination of Trace Copper in Environmental Samples by Flame Atomic Absorption Spectrometry After On-line Selective Preconcentration with Thioacetamide Modified Silica Gel Mini-Column[J]. Chinese Journal of Analytical Chemistry, 2012, 40(11): 1720-1724. doi: 10.3724/SP.J.1096.2012.20218 shu

硫代乙酰胺键合硅胶在线选择性固相萃取火焰原子吸收测定环境样品中痕量铜

通讯作者: 谢发之

基金项目:
本文系国家科技支撑计划项目(No.2011BAJ03B04) (No.2011BAJ03B04)

国家自然科学基金项目(No.21107001)资助 (No.21107001)

摘要: 以制备的硫代乙酰胺键合硅胶为微柱填充材料,建立酸性条件(pH 1.0)下流动注射微柱选择性预富集,0.6 mol/L硫脲溶液洗脱,火焰原子吸收测定环境样品中痕量铜的方法。流动注射在线固相萃取的最佳采样流速为8.0 mL/min;最佳洗脱流速为5.0 mL/min,时间为60 s。在优化的条件下,采样体积为10和50 mL时,线性范围分别为2.0-100.0 μg/L和0.5-30.0 μg/L;检出限(3σ)分别为0.36和0.07 μg/L;富集倍数分别为80和170;相对标准偏差分别为(n=9) 3.5%和2.0%。研究了环境样品中常见阴阳离子对测定的干扰。应用于灌木枝叶样品(GBW07602)、标准模拟水样(GBW08608)样品和环境样品中铜的分离与富集,取得满意结果。

关键词:

English

Determination of Trace Copper in Environmental Samples by Flame Atomic Absorption Spectrometry After On-line Selective Preconcentration with Thioacetamide Modified Silica Gel Mini-Column

1.
School of Materials Science and Chemical Engineering, Anhui University of Architecture, Hefei 230022, China

Corresponding author: 谢发之

Received Date: 03 March 2012
Fund Project:
本文系国家科技支撑计划项目(No.2011BAJ03B04)

国家自然科学基金项目(No.21107001)资助

Abstract: A selective and sensitive on-line preconcentration procedure was developed for the determination of trace levels of copper(Ⅱ) by flame atomic absorption spectrometry(FAAS). A mini-column packed with a silica gel functionalized with thioacetamide was used for the on-line selective enrichment of copper(Ⅱ) at pH 1.0.The copper(Ⅱ) was eluted with 0.6 mol/L thiourea solution and determined by FAAS. Some important flow injection variables affecting preconcentration were optimized (sample flow rate was 8.0 mL/min, eluent flow rate was 5.0 mL/min and elution time was 60 s). Under the optimum conditions, linear calibration graphs over the concentration ranges of 2.0-100.0 μg/L and 0.5-30.0 μg/L; detection limits of 0.36 and 0.07 μg/L; preconcentration factor of 80 and 170 were obtained for the preconcentration volumes of 10.0 and 50.0 mL of copper(Ⅱ) solutions, respectively. The relative standard deviations for 9 replicate determinations of copper(Ⅱ) were 3.5% and 2.0% at same conditions, respectively. The effect of the presence of various species commonly associated with environmental samples was also investigated. The method has been successfully applied to the selective determination of the trace Copper in standard reference materials GBW07602, GBW08608 with satisfactory results.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

硫代乙酰胺键合硅胶在线选择性固相萃取火焰原子吸收测定环境样品中痕量铜

通讯作者: 谢发之

English

Determination of Trace Copper in Environmental Samples by Flame Atomic Absorption Spectrometry After On-line Selective Preconcentration with Thioacetamide Modified Silica Gel Mini-Column

Corresponding author: 谢发之

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

硫代乙酰胺键合硅胶在线选择性固相萃取火焰原子吸收测定环境样品中痕量铜

通讯作者: 谢发之

English

Determination of Trace Copper in Environmental Samples by Flame Atomic Absorption Spectrometry After On-line Selective Preconcentration with Thioacetamide Modified Silica Gel Mini-Column

Corresponding author: 谢发之

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs