| 薄膜梯度扩散-石墨炉原子吸收光谱法测定自来水中痕量Cd(Ⅱ) |
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| 引用本文： | 陈宏,张晗,封丽,张梦晗,郭连文,励建荣,陈颖.薄膜梯度扩散-石墨炉原子吸收光谱法测定自来水中痕量Cd(Ⅱ)[J].食品科学,2015,36(4):185-188. |
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| 作者姓名： | 陈宏 张晗 封丽 张梦晗 郭连文 励建荣 陈颖 |
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| 作者单位： | 1.渤海大学化学化工与食品安全学院，辽宁省食品安全重点实验室，辽宁 锦州 121013；;
2.沈阳医学院化学教研室，辽宁 沈阳 110034；3.中国检验检疫科学研究院，北京 100123 |
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| 基金项目： | “十二五”国家科技支撑计划项目(2012BAD29B06);辽宁省科学事业公益研究基金项目(2012003001);辽宁省食品安全重点实验室开放课题(LNSAKF2011038) |
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| 摘 要： | 建立薄膜梯度扩散(diffusive gradients in thin-films,DGT)富集-石墨炉原子吸收光谱(graphite?furnace?atomic?absorption?spectrometry,GFAAS)法测定自来水中痕量Cd(Ⅱ)的新方法。先以聚天冬氨酸溶液为结合相的DGT装置富集自来水中Cd(Ⅱ),再使用GFAAS测定DGT结合相中Cd(Ⅱ)的含量,最后依据DGT方程计算自来水中Cd(Ⅱ)质量浓度。DGT-GFAAS法测得配制水中Cd(Ⅱ)的回收率为96.2%~101.7%;测得自来水中Cd(Ⅱ)质量浓度为0.21~0.35 mg/L,加标回收率为95.4%~107.0%,相对标准偏差为3.7%~7.4%;DGT-GFAAS法对自来水中Cd(Ⅱ)的检出限为0.002 5μg/L(采样48 h),可应用于饮用水中痕量Cd(Ⅱ)的定量测量。
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| 关 键 词： | 镉 薄膜梯度扩散 石墨炉原子吸收光谱法 聚天冬氨酸 自来水 |
Determination of Trace Cadmium in Tap Water by Diffusive Gradients in Thin-Films Technique Combined with Graphite Furnace Atomic Absorption Spectrometry |
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| CHEN Hong;ZHANG Han;FENG Li;ZHANG Menghan;GUO Lianwen;LI Jianrong;CHEN Ying.Determination of Trace Cadmium in Tap Water by Diffusive Gradients in Thin-Films Technique Combined with Graphite Furnace Atomic Absorption Spectrometry[J].Food Science,2015,36(4):185-188. |
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| Authors: | CHEN Hong;ZHANG Han;FENG Li;ZHANG Menghan;GUO Lianwen;LI Jianrong;CHEN Ying |
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| Affiliation: | 1. Food Safety Key Lab of Liaoning Province, College of Chemistry, Chemical Engineering and Food Safety,;
Bohai University, Jinzhou 121013, China; 2. Department of Chemistry, Shenyang Medical College, Shenyang 110034, China;
3. Chinese Academy of Inspection and Quarantine, Beijing 100123, China |
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| Abstract: | The Cd (Ⅱ) in tap water was enriched by diffusive gradients in thin-film (DGT) technique with sodium poly
(aspartic acid) (PASP) as binding phase (PASP-DGT) and measured by graphite furnace atomic absorption spectrometry
(GFAAS). The recoveries of Cd (Ⅱ) in the synthetic solutions measured by DGT-GFAAS method were 96.2%–101.7%. The
concentration of Cd (Ⅱ) in tap water measured by DGT-GFAAS was 0.21–0.35 mg/L with recoveries of 95.4%–107.0% and
RSD of 3.7%–7.4%. The detection limit of the DGT-GFAAS method was 0.002 5 μg/L (sampling time 48 h). Therefore, this
method can be used to measure trace Cd (Ⅱ) in tap water. |
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| Keywords: | cadmium diffusive gradients in thin-films (DGT) graphite furnace atomic absorption spectrometry (GFAAS) poly (aspartic acid) (PASP) tap water |
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