氢化物发生-原子荧光光谱法同时测定水中砷和汞
Simultaneous Determination of As and Hg in Water by Hydride Generation-Atomic Fluorescence Spectrometry
摘 要
采用氢化物发生-原子荧光光谱法同时测定水中砷和汞.对仪器的工作条件负高压、灯电流、载气和屏蔽气流量作了详述,还就各种对测定有影响的因素,包括酸的种类及其浓度、硼氢化钾的加入量、硫脲-抗坏血酸混合液的浓度及共存离子的干扰等也作了研究并予以优化选择.荧光强度与砷及汞的质量浓度在0.20~100.00 μg·L-1及0.01~80.00 μg·L-1范围内呈线性关系,方法的检出限(3S/N)依次为0.06 μg·L-1和0.006 μg·L-1,精密度试验求得其相对标准偏差(n=11)均小于5%.应用此法对自来水和景观用水进行分析,并以此两样品为基体做回收试验,测得砷和汞的回收率分别为100.2%,104.9%和98.0%,101.0%.
原子荧光法
砷
汞
Hydride genration
Atomic fluorescence spectrometry
Arsenic
Mercury
Abstract
HG-AFS was applied to the simultaneous determinations of arsenic and mercury in water.The working condition of instrument,including negative high-voltage,lamp current,the rates of carrier and shield gases,was described in detail.Influential factors,including the concentration and kinds of acids,amount of potassium borohydride added,concentration of mixed solution of thiourea and ascorbic acid,and interferences of the coexisting ions were studied.Linear relationships between the fluorescence intensity and mass concentration of As and Hg found were in the ranges of 0.20-100.00 and 0.01-80.00 μg·L-1,with detection limits (3S/N) of 0.06 μg·L-1 and 0.006 μg·L-1,respectively.Values of RSD′ (n=11) of the method found were less than 5%.The proposed method was applied to the analysis of samples of tap water and landscape water.Using these samples as matrixes,tests for recovery were made by standard addition method,values of recovery found were 100.2%,104.9% for arsenic,and 98.0%,101.0% for mercury.
中图分类号 O657.31
所属栏目 工作简报
基金项目 陕西省科技攻关项目(2008K16-07)
收稿日期 2007/12/14
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备注张延妮(1978-),女,陕西铜川人,讲师,博士研究生,主要从事药物分析研究.
引用该论文: ZHANG Yan-ni,DONG Juan-li. Simultaneous Determination of As and Hg in Water by Hydride Generation-Atomic Fluorescence Spectrometry[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(3): 316～318
张延妮,董娟丽. 氢化物发生-原子荧光光谱法同时测定水中砷和汞[J]. 理化检验－化学分册, 2009, 45(3): 316～318
被引情况:
【1】彭 锐,罗岳平,王 强,黄钟霆,张 艳,郭 卉, "提高极谱法重金属水质在线监测仪对低浓度水样测量准确性的探讨",理化检验－化学分册 52, 847-848(2016)
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参考文献
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【2】Kundu S,Ghosh S K,Mandal M,et al.Spectrophotometric determination of arsenic via arsine generation and in-situ colour bleaching of methylene blue (MB) in micellar medium[J].Talanta,2002,58:935-942．
【3】Yang L L,Zhang D Q.In situ preconcentration and determination of trace arsenic in botanical samples by hydride generation-graphite furnace atomic absorption spectrometry with Pd-Zr as chemical modifier[J].Anal Chim Acta,2003,491:91-97．
【4】刘晶,郑楚光,陆晓华.微波消解和氢化物发生ICP-AES法测定煤中痕量砷[J].分析科学学报,2004,20(1):23-25．
【5】蔡卓,吴健玲,朱晓韵,等.催化极谱法快速测定硫磺中微量砷[J].化学世界,2001(1):14-16．
【6】姚宏伟,卢星河.溶出伏安法测定砷及总砷研究[J].河北建筑科技学院学报:自然科学版,2000,17(2):1-3．
【7】Sbarato V M,Sánchez H J.Analysis of arsenic pollution in groundwater aquifers by X-ray fluorescence[J].Applied Radiation and Isotopes,2001,54:737-740．
【8】李冰,史世云,何红蓼,等.电感耦合等离子体质谱法同时测定地质样品中痕量碘溴硒砷的研究Ⅱ土壤及沉积物标准物质分析[J].岩矿测试,2001,20(4):241-246．
【9】虞锐鹏,贡小清,杨健,等.氢化物发生-原子吸收光谱法测定中华白海豚中的汞和砷[J].光谱实验室,2005,22(5):1090-1093．
【10】李松,黎国兰.双硫腙分光光度法测定空气中汞的改进[J].光谱实验室,2005,22(6):1280-1283．
【11】李慧芸,温玉成,邢志,等.原子荧光光谱法测定蛇粉中汞的方法研究[J].分析试验室,2008,27(8):55-57．
【12】赵丽琴,王恒根.氢化物发生-原子荧光光谱法测定小麦粉中的砷[J].光谱实验室,2008,25(5):943-946．
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