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氢化物发生新体系-原子荧光法同时测定铅和镉
A Novel Hydride Generation System for the Simultaneous Determination of Lead and Cadmium Using Atomic Fluorescence Spectrometry

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文摘 报道了Pb和Cd同时氢化物发生的K_3Fe(CN)_6-(NH_4)_2Ce(NO_3)_6-NaBH_4-HCl新体系,并探讨了相关反应机理。(NH_4)_2Ce(NO_3)_6作为氧化剂将Pb(Ⅱ)氧化为Pb(Ⅳ),Fe(CN)~3-6与Pb(Ⅳ)络合促进了Pb的氢化物发生。同时,体系中的(NH_4)_2Ce(NO_3)_6作为Cd氢化物发生过程中的增敏剂使荧光信号显著增强。在该体系中,Pb和Cd的氢化物发生不产生相互干扰。本实验据此建立了顺序注射-氢化物发生-双道原子荧光同时测定Pb和Cd的方法。所采用的实验条件包括NaBH_4、HCl、K_3Fe(CN)_6和(NH_4)_2Ce(NO_3)_6的浓度分别为2%、3%、0.6%和0.3%。以125μL/s进样500μL,得到的线性范围分别为0.4-15μg/L(Pb)和0.5-20μg/L(Cd);对应的检出限分别为0.09μg/L(Pb)和0.17μg/L(Cd);方法的精密度为0.5%(6.0μg/L Pb,n=9)和1.0%(6.0μg/L Cd,n=9)。将本法应用于国家标准样品GBW08608中Pb和Cd的检测。检测值与标准值相符;对河水及海水中Pb和Cd进行了同时测定,加标回收率合格。
其他语种文摘 A novel hydride generation system was developed for the simultaneous hydride generation of lead and cadmium, i.e., the system of K_3 Fe (CN) _6-(NH_4)_2 Ce(NO_3)_6-NaBH_4-HCl, which no interfering effects from the hydride generation of the two species were identified. The mechanisms of the hydride generation process include the oxidation of Pb (Ⅱ) by (NH_4)_2 Ce (NO_3)_6, meanwhile, the K_3 Fe(CN)_6 was used as a coordinating reagent to form a complex with Pb(Ⅳ) which facilitates its ensuing hydride generation. Cadmium hydride generation follows the conventional process with (NH_4)_2 Ce(NO_3)_6 serves as a sensitizer. A sequential injection-hydride generation-atomic fluorescence spectrometric procedure was developed for the simultaneous determination of lead and cadmium. When employing the following experimental parameters, i. e., 2% NaBH_4o3% HCl-0.6% K_3Fe(CN)_6-0.3% (NH_4)_2 Ce(NO_3)_6, a 500-μL sampling volume at a flow rate of 125 μL/s, the obtained linear ranges were 0. 4 - 15 μg/L (Pb) and 0. 5 -20 μg/L (Cd) respectively, along with limits of detection of 0. 09 μg/L (Pb) and 0. 17 μg/L (Cd). The RSDs of the procedure were derived as 0.5% (6.0 μg/L Pb, n =9) and 1.0 % (6.0 μg/L Cd, n =9). The present procedure was applied for the determination of lead and cadmium in a certified reference material of water sample, GBW08608, a coastal sea water and a riverine water sample, with satisfactory spiking recoveries.
来源 分析化学 ,2008,36(2):162-166 【核心库】
关键词 氢化物发生-原子荧光 ; ;
地址

东北大学分析科学研究中心, 辽宁, 沈阳, 110004

语种 中文
文献类型 研究性论文
ISSN 0253-3820
学科 化学;环境科学基础理论
基金 国家自然科学基金 ;  国家教育部高等学校博士学科点专项科研基金
文献收藏号 CSCD:3207217

参考文献 共 15 共1页

1.  Duan T C. Talanta,2005,67:968-974 被引 6    
2.  Edwin A. Talanta,2004,63:419-424 被引 1    
3.  Guo X W. Anal. Chim. Acta,1995,310:377-385 被引 27    
4.  Liu Z F. Anal. Chim. Acta,2005,550:151-155 被引 5    
5.  Lu Y K. Anal. Chem,2002,74:1525-1529 被引 9    
6.  Madrid Y. Analyst,1994,119:1647-1658 被引 3    
7.  Mesko M F. Anal. Chim. Acta,2004,517:195-200 被引 4    
8.  Sun H W. Anal. Chim. Acta,2004,505:255-261 被引 12    
9.  Tyson J F. Talanta,2000,52:403-410 被引 6    
10.  Wan Z. Analyst,2006,131:141-147 被引 10    
11.  Wang J H. At. Spectrom,2004,19:1559-1563 被引 1    
12.  Wang Y. Anal. Chem,2005,77:5396-5401 被引 7    
13.  Ye Q Y. Agric. Food Chem.,2003,51:2111-2114 被引 5    
14.  宋雪洁. 氢化物发生原子荧光光谱法测定铅基合金中砷. 分析化学,2007,35(8):1183-1186 被引 8    
15.  李安模. 原子吸收及原子荧光光谱分析,2002:215-232 被引 1    
引证文献 13

1 周乐舟 中孔分子筛P123-SH分离富集-火焰原子吸收法测定水样中镉 分析化学,2008,36(8):1109-1112
被引 7

2 韩晓燕 流动注射-微柱在线富集/电感耦合等离子发射光谱法测定中成药中痕量铅和镉 分析化学,2009,37(7):1014-1018
被引 4

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