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1.
Md. Nurul Amin Satoshi Kaneco Ken Nomura Tohru Suzuki Kiyohisa Ohta 《Mikrochimica acta》2003,141(1-2):87-91
A preconcentration method for antimony in waters involving adsorption on a tantalum wire, followed by electrothermal atomic
absorption spectrometry with a tungsten tube atomizer is described. The best pH for the adsorption of antimony was 2. The
optimal immersing time was 120 s. Under the optimal conditions, the detection limit for antimony by the tantalum wire preconcentration
method was 50 pg/mL (3S/N) and the relative standard deviation was 9.4%. The effects of large amounts of concomitants on the
preconcentration of antimony were evaluated. Even though 103–104 fold excess of matrix elements existed in water, the antimony response was not significantly affected by the matrix elements.
The method with preconcentration on a tantalum wire was applied to the determination of antimony in waters and proved to be
sensitive, simple, and convenient. This adsorption method can be utilized in in-situ sampling of ultra-trace antimony in environmental samples (water). Furthermore, after sampling it is easy to carry and store
the tantalum wire without contamination for a long time. The technique developed was shown to be useful for the determination
of Sb in waste waters at the 1–5 μg/L level.
Received March 20, 2002; accepted June 26, 2002 相似文献
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本文将电热氢化物原子吸收光谱技术应用于食品中微量锑铋测定,检出限可达ppb级。探讨了被测元素价态、预还原条件等因素对测定灵敏度的影响,并应用于罐头食品中微量锑铋分析。 相似文献
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A method is described for the determination of inorganic arsenic species and total arsenic in wines by means of hydride generation atomic absorption spectrometry (HGAAS). Simple ethanol evaporation is the only pretreatment procedure proposed for wine samples prior to direct measurement of inorganic arsenic (AsIII) and As(V) species by HGAAS. The total arsenic content is determined after microwave digestion of the wine samples. The optimal parameters for the microwave digestion procedure and the next HGAAS measurement of arsenic are established. The detection limits achieved are 0.1µgL–1 for inorganic and total arsenic determination. The relative standard deviation for both procedures and for ten independent determinations varied between 8 and 15% for arsenic species in the range of 1–30µgL–1. The accuracy of the procedure for total arsenic determination was proved by comparative analysis using electrothermal atomic absorption spectrometry. 相似文献
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本文建立了一个微型氢化物发生原子吸收法测定微量锑的方法。用CyDTA 和8-羟基喹啉-草酸分别消除了钴和镍的干扰,采用峰面积测量模式,灵敏度22pg/1%。同时对镍的液相干扰机制做了一些探讨。 相似文献
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《Analytical letters》2012,45(7):419-424
Abstract The sensitivity of antimony determination with atomic absorption spectrophotometry is enhanced to a large extent by introducing stibine gas into an argon-hydrogen flame. As a reducing agent, zinc tablet made from the zinc powder paste with water is successfully used for quantitative and rapid productions of stibine from antimony (III) solution. The sensitivity for 1% absorption of the signal is estimated to be about 0.004 ppm of antimony. 相似文献
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为了探讨原子吸收光谱法和原子发射光谱法测定工业废水中的总铬分析方法的异同,分别采用两种方法对工业废水中的总铬进行了对比分析,对样品前处理方法,方法的标准曲线、检出限、准确度、精密度、干扰及消除等进行了比较,并对两种方法的测定结果进行t检验。结果表明,两种方法具有良好的一致性。相对来说,原子发射光谱法各方面指标要优于原子吸收光谱法。 相似文献
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本文对铟氢化物发生方法进行了探讨,所采用的方法使铟氢化物的发生效率明显提高。在电加热石英管原子化器中得到的测定灵敏度为0.007μg/(1%吸收),比文献报道值提高了一个数量级。并讨论了铟氢化物的发生机理与原子化机理。 相似文献
8.
《Analytical letters》2012,45(13):2312-2320
The purpose of this paper is to present a procedure for the simultaneous determination of metalloids: arsenic, antimony, and selenium. Hydride generation was provided in a reaction vessel connected with the atomic absorption spectrometer (AAS) in a fast sequential mode. Two different types of water samples were used while developing the application: seawater and groundwater. The methodology of liquid samples analysis was developed with detection limits of 0.05, 0.03, and 0.06 ng · mL?1 for arsenic, antimony, and selenium, respectively, in 10 mL samples. This methodology was used to determine arsenic, antimony, and selenium in natural water samples. 相似文献
9.
火焰原子吸收分光光度法测大沂河水体的重金属含量 总被引:1,自引:0,他引:1
采用火焰原子吸收分光光度法测定了山东省曲阜市大沂河水体的重金属铜、铅、镉、锌含量。结果表明,大沂河水体中铜、铅、镉、锌的最高含量分别为0.018,0.230,0.176,0.490mg/L,其中铅和镉的含量超过国家Ⅴ类水标准。 相似文献
10.
建立电热原子吸收法测定水中总钼的含量。样品采用硝酸–过氧化氢消解,热解涂层石墨管减小记忆效应,塞曼背景校正消除背景噪声。检测了27种共存离子的干扰影响。经6家实验室对标准物质和实际样品检测验证,方法检出限为0.6μg/L,能够满足微量检测要求。钼测定结果相对误差最大值为–6.2%,实验室内相对标准偏差为4.5%~7.6%(n=6),实验室间相对标准偏差为4.3%~5.7%(n=6),加标回收率为91.8%~104.0%。该方法精密度和准确度满足我国地下水和废水监测技术规范的质控要求。 相似文献
11.
探讨了使用HCl-HF-HClO4分解体系,对碱性锌锰电池进行预处理,测定总铅含量的方法。 相似文献
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JIN Ze-Xiang TAN Chun-Hua LIU Guo-Zhen TANG Zhi-Yong QIU Hai-Ou HU Sheng-Hong 《高等学校化学学报》1999,20(Z1):61
The hydride generation(HG) technique combined with atomic spectrometry as a detection system has become one of the most powerful analytical tools for the determination of elements, such as As, Sb, Bi, Se, Te,Ge, Sn and Pb. Normally, the hydride is generated by the reaction between an acidic sample solution with tetrahydroborate. However, when some inorganic ions such as the transition metal ions are present in the reaction matrix, interference arise. Some approaches for minimizing the interference have been suggested, including the addition of various reagents such as thiourea and iron(III) solution. Interfering metals can also be removed by precipitation. The procedure involved filtration before the solution was acidified. In order to reduce the steps of the process, hydride generation from alkaline solution was described for the determination of selenium in copper and nickel materials. 相似文献
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提出了以氢化物发生-原子吸收光谱法测定萤石粉中砷的方法,研究了酸介质、还原剂、载气流量等因素对测定的影响,并选择出最佳工作条件.砷的检出限为0.052μg·g-1,线性范围为0.10~6.00 μg·L-1,回收率在90.0%~102.0%之间,相对标准偏差为9.8%. 相似文献
17.
原子吸收和原子荧光光谱分析 总被引:8,自引:0,他引:8
本文是《分析试验室》期刊定期评述中关于原子吸收光谱(AAS)及原子荧光光谱(AFS)分析的第10篇综述文章。文中对2002年12月~2004年11月期间我国在AAS/AFS领域所取得的主要进展进行评述。内容包括概述、仪器装置与数据处理、火焰原子吸收光谱法、电热原子吸收光谱法、化学蒸气发生技术以及原子荧光光谱法等。收集文献511篇。 相似文献
18.
A method was developed for the determination of antimony in slurried sediments (on the basis of samples of three Certified Reference Materials) by electrothermal atomic absorption spectrometry (ETAAS) with Zeeman-effect background correction. Slurried samples were prepared in 6% nitric acid containing 0.02% of Triton X-100. A mixed palladium/magnesium chemical matrix modifier, L'vov platform atomization and a temperature-time program with a relatively short (10 s) sample pyrolysis stage were used. The results of the determinations by this technique are in very close agreement with certified values and the repeatability of this analytical procedure expressed in terms of relative standard deviation was typically better than 9% at the slurry concentration of approx. 90 mg/2 mL. The characteristic mass of Sb (at the spectral line 231.1 nm) was 25.6 pg and the limit of detection (calculated for 100 mg/2 mL slurry) was about 0. 04 μg/g. 相似文献
19.
平台石墨炉原子吸收法直接测定镍基合金中铅和锑 总被引:2,自引:0,他引:2
平台石墨炉原子吸收法直接测定镍基合金中铅和锑谢文兵,姚金玉,胡庆兰(中国科学院长春应用化学研究所长春130022)关键词石墨炉原子吸收,镍合金,铅,锑,基体改进剂石墨炉原子吸收法是测定痕量元素最有效的方法之一。但是铅和锑都是易挥发元素,为了增强灰化过... 相似文献