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DETERMINATION OF ANTIMONY IN WATER SAMPLES BY FLOW-INJECTION HYDRIDE GENERATION ATOMIC ABSORPTION SPECTROMETRY WITH ON-LINE ION-EXCHANGE COLUMN PRECONCENTRATION
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作者 Shu Kun XU and Zhao Lun FANG Institute of Applied Ecology, Academia Sinica, Shenyang, 110015 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第11期915-918,共4页
On-line ion-exchange separation and preconcentration were combined with flow-injection hydride generation atomic absorption spectrometry (HGAAS) to determine ultra-trace amounts of antimony in water samples. Antimony(... On-line ion-exchange separation and preconcentration were combined with flow-injection hydride generation atomic absorption spectrometry (HGAAS) to determine ultra-trace amounts of antimony in water samples. Antimony(Ⅲ) was preconcentrated on a micro-column packed with CPG-8Q chelating ion-exchanger using time-based sample loading and eluted by 4 mol l^(-1) HCl directly into the hydride generation AAS system. A detection limit (3σ) of 0.0015μg l^(-1) Sb(Ⅲ) was obtained on the basis of a 20 fold enrichment and with a sampling frequency of 60h^(-1). The precision was 1.0% r.s.d.(n=11) at the 0.5μg l^(-1) Sb(Ⅲ) level. Recoveries for the analysis of antimony in tap water, snow water and sea water samples were in the range 97-102%. 展开更多
关键词 Zhang DETERMINATION OF ANTIMONY IN WATER SAMPLES BY flow-INJECTION HYDRIDE generation atomic absorption spectrometry WITH ON-LINE ION-EXCHANGE COLUMN PRECONCENTRATION SQ CPG ION LINE
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Determination of total arsenic by photo-decomposition of organoarsenic compounds and hydride generation electrothermal atomic absorption spectrometry 被引量:4
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作者 Han Hengbin, Liu Yanbing, Zhang Shuzhen Ni ZhemingResearch Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P. O. Box 2871, Beijing 100085, China 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1993年第1期99-107,共9页
A method was developed for the determination of total arsenic concentration in less than ng/ml level by decomposition of organoarsenicals using photo -oxidation combined with in situ trapping of arsenic hydride on a p... A method was developed for the determination of total arsenic concentration in less than ng/ml level by decomposition of organoarsenicals using photo -oxidation combined with in situ trapping of arsenic hydride on a palladium coated graphite tube with subsequent atomization and detection by AAS. The organoarsenicals include monomethylarsenic, dimethylarsenic, arsenobetaine, arsenocholine, o -aminobenzenarsenate and p -aminobenzenarsenate. The method is simple and sensitive. Detection limit was obtained from different arsenic compounds over the range from 0. 058 to 0.063 ng/ml as As (based on three times of the standard deviation of 10 blank measurements) and the relative standard deviations for ten replicate measurements were from 2.0 to 3.8%. The calibration curves of arsenic compounds including inorganic and organic arsenicals were linear over the range from 0.1 to 3.0 ng/ml as As. The recommended method has been applied to the determination of total arsenic in tap and lake water samples at ng/ml levels. 展开更多
关键词 electrothermal atomic absorption spectrometry photo -decomposition organoarsenic compounds arsenic hydride generation tap/lake water
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Effect of sample treatment on determination of arsenic (Ⅲ) and arsenic (Ⅴ) in aqueous and tissue samples by hydride generation atomic absorption spectrometry 被引量:1
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作者 Jamileh Salar-Amoli Tahereh Ali-Esfahani Jalal Hassan 《Journal of Chemistry and Chemical Engineering》 2009年第6期49-53,共5页
The purpose of this procedure was to optimize and improve a method that used for the determination of arsenic (Ⅲ) and arsenic (Ⅴ) in biological and environmental samples. The method is based on hydride generatio... The purpose of this procedure was to optimize and improve a method that used for the determination of arsenic (Ⅲ) and arsenic (Ⅴ) in biological and environmental samples. The method is based on hydride generation and atomic absorption spectrometry. For both As (Ⅲ) and As (Ⅴ) the parameters such as NaBH4, HCI concentration, and pH were optimized. Absorption signal of As (Ⅴ) was approximately 17% of As (Ⅲ) signal. Therefore, for estimation of As (Ⅲ) and As (Ⅴ) concentrations in various samples the difference between the absorbance obtained for arsenic, without and with previous treatment of samples with potassium iodide (KI), can be applied. The calibration graphs were linear (r〉0.99), and the detection limits of the method based on three times the standard deviation of the blank were 0.14 and 0.64 μL^-1 for As (Ⅲ) and As (Ⅴ), respectively. The relative standard deviation (R.S.D.) of measurements was less than 10%. As a means of checking performance method, water samples were spiked with known concentrations of both As (Ⅲ) and As (Ⅴ), and recovery above 94% was obtained. The proposed method was applied successfully to determine inorganic As (Ⅲ) and As (Ⅴ) in various environmental and total As in biological samples. 展开更多
关键词 arsenic speciation hydride generation atomic absorption spectrometry
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Speciation of Dissolved Trace Nickel in Environmental Waters by On-Line Sonodigestion-Flow Injection Solid Phase Extraction Coupled to Flame Atomic Absorption Spectrometry 被引量:1
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作者 M. C. Yebra-Biurrun J. M. Castro-Romero 《American Journal of Analytical Chemistry》 2011年第2期116-125,共10页
A simple on-line sonodigestion system was successfully used for breakdown organic nickel complexes in environmental waters acidified with diluted nitric acid prior to flow injection total dissolved nickel preconcentra... A simple on-line sonodigestion system was successfully used for breakdown organic nickel complexes in environmental waters acidified with diluted nitric acid prior to flow injection total dissolved nickel preconcentration in a microcolumn containing a chelating resin (Chelite Che with iminodiacetic acid groups) and determination by flame atomic absorption spectrometry. For the determination of the dissolved labile nickel fraction, microcolumns packed with the chelating resin were loaded in-situ with the sample without sample pH modification, and once in the laboratory were inserted in the flow injection device where nickel elution-detection was carried out. The performance of the chelating resin was investigated in order to elucidate its behavior in the presence of dissolved nickel species. The results obtained reveal that the resin, at the experimental employed conditions, retained only dissolved free nickel ions and nickel bound to weak complexes (labile fraction). The figures of merit for determinations in both nickel fractions are given and the obtained values are discussed. The speciation scheme is applied to the analysis of nickel in river and seawater samples collected in Galicia (Northwest, Spain). The results of fractionation showed that Ni are mainly in the dissolved labile fraction in river water, while in seawater samples analyzed was mainly present in the organic fraction. 展开更多
关键词 Sonodigestion PRECONCENTRATION flow Injection Nickel SPECIATION FLAME atomic absorption spectrometry Environmental Water
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Flow Injection Semi-online Preconcentration Graphite Furnace Atomic Absorption Spectrometry for Determination of Cadmium,Copper and Manganese 被引量:3
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作者 ZHANG Yi-hua, WANG Mei-jia, SU Xing-guang, ZHENG Tao, ZHANG Han-qi and JIN Qin-han Department of Chemistry, Jilin University, Changchun 130023, P. R. ChinaCHEN YingJilin Environmental Monitoring Centre, Changchun 130011, P. R. China 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第1期1-7,共7页
A micro-flow injection sorbent extraction preconcentration system was combined with a graphite furnace atomic absorption spectrometry that formed an integrated system for the determination of trace amounts of elements... A micro-flow injection sorbent extraction preconcentration system was combined with a graphite furnace atomic absorption spectrometry that formed an integrated system for the determination of trace amounts of elements. The analytical performances of the prospsed method for determining Cd, Cu and Mn were studied. The analytes were preconcentrated with a thiol resin(Type 190, produced by Nankai University, China) whose active group is -SH. The elements to be determined were preconcentrated onto the column for 60 s and then rinsed with deionized water and eluted with 30 μL of 1 mol/L HCl. The graphite furnace atomic absorption spectrometry(GFAAS) determination of the concentrated analyte was carried out in parallel with the next preconcentration cycle. Enrichment factors 41, 22 and 20 and detection limits(3 σ , n =10) 0.36, 3.8 and 7.0 ng/L for Cd, Cu and Mn, respectively, along with a sampling frequency of 20 h -1 , were obtained with a 60 s loading time at a sample flow rate of 3.5 mL/min. The analytical results for a number of water samples show that the flow-injection semi-online column preconcentration can not only eliminate the effect of some concomitant elements, such as Li, Na, K, Ca and Mg, on the determination of the analyte, but also enhance the sensitivity. 展开更多
关键词 flow-INJECTION Semi-online preconcentration atomic absorption spectrometry Cadmium Copper Manganese
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Flow-Injection Flame Atomic Absorption Determination of Hexavalent Chromium with On-Line Preconcentration on an Anion Imprinted Polymer 被引量:1
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作者 María Carmen Yebra-Biurrun Jesús Manuel Castro-Romero Nieves Carro-Marino 《American Journal of Analytical Chemistry》 2012年第11期755-760,共6页
A flow injection preconcentration system for the flame atomic absorption spectrometric determination of hexavalent chromium has been developed. The method employs on-line preconcentration of Cr(VI) on a minicolumn pac... A flow injection preconcentration system for the flame atomic absorption spectrometric determination of hexavalent chromium has been developed. The method employs on-line preconcentration of Cr(VI) on a minicolumn packed with Cr(VI)-imprinted poly(4-vinyl pyridineco-2-hydroxyethyl methacrylate) placed into a flow injection system. Hexava-lent chromium was eluted with a small volume of diluted hydrochloric acid into the nebulizer-burner system of a flame atomic absorption spectrometer. An enrichment factor of 550 and a 3σ detection limit of 0.04 μg·L-1 along a sampling frequency of 4 h-1 at a sample flow rate of 3.5 mL·min-1. The relative standard deviation is 2.9% for 1 μg·L-1 Cr(VI) (n = 11). The flow injection system proposed has the advantage of being simpler because the use of expensive and sophisticated instruments is avoided. Ease of use, continuous process and selectivity make this method suitable for Cr(VI) determination in different environmental samples such as sea and river waters, soils and sediments. 展开更多
关键词 Hexavalent Chromium Flame atomic absorption spectrometry PRECONCENTRATION flow Injection Environmental Samples
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Determination of Inorganic Arsenic Species by Electrochemical Hydride Generation Atomic Absorption Spectrometry with Selective Electrochemical Reduction 被引量:1
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作者 李勋 汪正浩 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第3期295-299,共5页
A new direct procedure for the determination of inorganic arsenic species was developed by electrochemical hydride generation atomic absorption spectrometry (EcHG-AAS) with selective electrochemical reduction. The d... A new direct procedure for the determination of inorganic arsenic species was developed by electrochemical hydride generation atomic absorption spectrometry (EcHG-AAS) with selective electrochemical reduction. The determination of inorganic arsenic species is based on the fact that As(Ⅲ) shows significantly higher absorbance at low electrolytic currents than As(Ⅴ) in 0.3 mol·L^-1 H2SO4. The electrolytic current used for the determination of As(Ⅲ) without considerable interferences of As(Ⅴ) was 0.4 A, whereas the current for the determination of As(Ⅲ) and As(Ⅴ) was 1.2 A. For equal concentrations of As(Ⅲ) and As(Ⅴ) in a sample, the interferences of As(Ⅴ) during the As(Ⅲ) determination were smaller than 5%. The absorbance for As(Ⅴ) could be calculated by subtracting that for As(Ⅲ) measured at 0.4 A from the total absorbance for As(Ⅲ) and As(Ⅴ) measured at 1.2 A, and then the concentration of As(Ⅴ) can be obtained by its calibration curve at 1.2 A. The methodology developed provided the detection limits of 0.3 and 0.6 ng·mL^-1 for As(Ⅲ) and As(Ⅴ), respectively. The relative standard deviations were of 3.5% for 20 ng·mL^-1 As(Ⅲ) and 3.2% for 20 ng·mL^-1 As(Ⅴ). The method was successfully applied to determination of soluble inorganic arsenic species in Chinese medicine. 展开更多
关键词 electrochemical hydride generation atomic absorption spectrometry inorganic arsenic species
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流动注射在线过滤稀释原子吸收法测定药物制剂中卡托普利 被引量:31
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作者 李亚荣 郎惠云 +1 位作者 谭峰 焦更生 《分析化学》 SCIE EI CAS CSCD 北大核心 2002年第2期165-168,共4页
提出了卡托普利的FI-AAS分析新方法。它是基于在适当酸度条件下卡托普利将Cu^(2+)还原为 Cu~+.新生的Cu~+与SCN~-生成白色沉淀,经流动注射在线过滤稀释,以AAS法测定反应剩余Cu^(2+)的量来间接测定卡... 提出了卡托普利的FI-AAS分析新方法。它是基于在适当酸度条件下卡托普利将Cu^(2+)还原为 Cu~+.新生的Cu~+与SCN~-生成白色沉淀,经流动注射在线过滤稀释,以AAS法测定反应剩余Cu^(2+)的量来间接测定卡托普利的量。在2-100 mg/L范围内呈良好的线性关系,回收率为97.1%~99.5%,采样频率为100h^(-1)。方法简单、快速、选择性好,节省试剂,用于卡托普利的测定.获得满意结果。 展开更多
关键词 流动注射 在线过滤 原子吸收光谱法 卡托普利 药物制剂 血管紧张素转移酶抑制剂 测定 分析
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双微柱在线富集-火焰原子吸收光谱法测定环境水样中痕量镉 被引量:11
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作者 康维钧 梁淑轩 +3 位作者 贾丽辉 许丽琴 赵岩 孙汉文 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2005年第5期792-795,共4页
采用单阀双阳离子交换树脂微柱并联,设计了双柱交替采样逆向洗脱在线富集系统,该系统与原子吸收测量技术相结合,实现了在线富集火焰原子吸收光谱法测定水中镉,富集1min时,分析速度为60样/h,测定镉的特征浓度为0.931μg·L-1,线性范... 采用单阀双阳离子交换树脂微柱并联,设计了双柱交替采样逆向洗脱在线富集系统,该系统与原子吸收测量技术相结合,实现了在线富集火焰原子吸收光谱法测定水中镉,富集1min时,分析速度为60样/h,测定镉的特征浓度为0.931μg·L-1,线性范围分别为0~90μg·L-1,相对标准偏差分别为2.69%、检出限(3σ)为0.808μg·L-1该法对实际水样加标回收率在95.0%~103.7%之间。 展开更多
关键词 火焰原子吸收光谱 在线富集 流动注射
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流动注射-火焰原子吸收光谱法测定地质样品中的常量金 被引量:19
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作者 何小辉 白金峰 +1 位作者 陈卫明 张勤 《岩矿测试》 CAS CSCD 北大核心 2011年第1期79-82,共4页
样品经室温烧至650℃高温后灼烧保持1.5 h,用浓王水溶解。用泡塑分两次吸附富集样品中的常量金,将富集同一样品中金的两块泡塑置于盛有10 mL 10 g/L硫脲溶液的玻璃试管中,沸水浴保持20 min,使金释放出来,所得溶液应用原子吸收分光光度... 样品经室温烧至650℃高温后灼烧保持1.5 h,用浓王水溶解。用泡塑分两次吸附富集样品中的常量金,将富集同一样品中金的两块泡塑置于盛有10 mL 10 g/L硫脲溶液的玻璃试管中,沸水浴保持20 min,使金释放出来,所得溶液应用原子吸收分光光度计采用流动注射测定。对仪器的测定条件进行了优化比较。方法检出限(3σ)为0.022μg/g,精密度(RSD,n=11)小于8.0%,测定范围为0.05~60μg/g。经国家金矿石分析标准物质验证,其测定值与标准值基本一致。 展开更多
关键词 地质样品 火焰原子吸收光谱法 流动注射
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流动注射在线萃取石墨炉原子吸收光谱法测定地质样品中痕量金 被引量:10
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作者 陈文武 陈飞 +2 位作者 郑洪涛 汤志勇 金泽祥 《光谱实验室》 CAS CSCD 2005年第2期428-431,共4页
采用流动注射在线萃取石墨炉原子吸收光谱法测定了地质样品中痕量金 ,研究了二苯硫脲 -甲基异丁酮在线萃取金的实验条件和流路参数。试验表明 ,该法有效地消除了基体干扰。测定含金量为0 .0 5 1 μg/ g标准物质相对标准偏差 (n=8)为 4 .... 采用流动注射在线萃取石墨炉原子吸收光谱法测定了地质样品中痕量金 ,研究了二苯硫脲 -甲基异丁酮在线萃取金的实验条件和流路参数。试验表明 ,该法有效地消除了基体干扰。测定含金量为0 .0 5 1 μg/ g标准物质相对标准偏差 (n=8)为 4 .2 %,检出限为 0 .6 ng/ g,采样速率为 2 0样 / h。 展开更多
关键词 石墨炉原子吸收光谱法 在线萃取 地质样品 流动注射 痕量金 测定 相对标准偏差 甲基异丁酮 实验条件 二苯硫脲 基体干扰 标准物质 采样速率 含金量 检出限
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流动注射在线预富集火焰原子吸收法测定水中的痕量铅 被引量:24
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作者 金劲草 陈恒武 沈学优 《分析化学》 SCIE EI CAS CSCD 北大核心 1996年第8期957-960,共4页
本文研究了流动注射在线编结反应器吸附预富集火焰原子吸收测定痕量铅的体系。在线生成的二乙基二硫代氨基甲酸铅螯合物被吸附在反应器内壁,然后由甲基异丁基酮洗脱并直接输送至火焰原子化器。新设计了颇具特点的一泵一阀自动预富集流... 本文研究了流动注射在线编结反应器吸附预富集火焰原子吸收测定痕量铅的体系。在线生成的二乙基二硫代氨基甲酸铅螯合物被吸附在反应器内壁,然后由甲基异丁基酮洗脱并直接输送至火焰原子化器。新设计了颇具特点的一泵一阀自动预富集流路。经40s预富集,测定铅的灵敏度提高32倍,检测限达2.9μg/L。40μg/L和200μg/L铅10次测定的相对标准偏差(RSD)分别为1.4%和1.0%。加入0.5%抗坏血酸,0.1%邻菲啰啉,1%硫脲混合掩蔽剂可以消除1mg/LCu2+、50mg/LFe3+等常见离子的干扰。所建立的方法已用于水样中痕量铅的测定。 展开更多
关键词 流动注射分析 在线预富集 火焰原子吸收
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空气隔离法流动注射在线预富集火焰原子吸收测定水样中的痕量铜和镉 被引量:16
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作者 苏耀东 朱文颖 +1 位作者 覃俐 陈龙武 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2006年第5期959-962,共4页
研究了高效的在线流动注射编结反应器预富集火焰原子吸收系统直接测定水样中的痕量铜和镉。实验中将样品溶液和作为沉淀剂的氨水溶液输入编结反应器中,产生的铜和镉的氢氧化物沉淀被吸附在反应器壁内,然后通入一段空气流,再用硝酸洗脱... 研究了高效的在线流动注射编结反应器预富集火焰原子吸收系统直接测定水样中的痕量铜和镉。实验中将样品溶液和作为沉淀剂的氨水溶液输入编结反应器中,产生的铜和镉的氢氧化物沉淀被吸附在反应器壁内,然后通入一段空气流,再用硝酸洗脱并直接输送至火焰原子化器。在pH5条件下,样品流速为4·4mL·min-1,经90s预富集,测定铜和镉的灵敏度分别提高34倍和36倍,检测限达1·9和0·3μg·L-1。对铜和镉含量分别为30,20μg·L-1的溶液连续测定11次的相对标准偏差分别为2·3%和2·6%。此法用于饮用水和环境水样中痕量铜和镉的测定,获得了满意的结果。 展开更多
关键词 流动注射在线预富集 火焰原子吸收光谱法 编结反应器
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流动注射在线过滤稀释-原子吸收分光光度法测定阿莫西林 被引量:21
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作者 李媛 郎惠云 +1 位作者 李会娥 谢志海 《分析化学》 SCIE EI CAS CSCD 北大核心 2000年第10期1252-1255,共4页
首次提出了阿莫西林的FI-AAS分析方法。它是基于阿莫西林在适当的酸度条件下与高锰酸钾和氯化钡反应生成沉淀,经流动注射在线过滤稀释,以AAS法测定反应剩余锰的量来间接测定阿莫西林的量。本法在 2~20mg/L范围内呈... 首次提出了阿莫西林的FI-AAS分析方法。它是基于阿莫西林在适当的酸度条件下与高锰酸钾和氯化钡反应生成沉淀,经流动注射在线过滤稀释,以AAS法测定反应剩余锰的量来间接测定阿莫西林的量。本法在 2~20mg/L范围内呈良好的线性关系(R2=0.9998)。回收率为 97.6%~98.9%,采样频率为 100 h-1。与药典法相比,相对平均偏差小于 0.2%。用于实际样品测定,获得满意结果。 展开更多
关键词 流动注射法 原子吸收光谱法 阿莫西林 药物分析
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在线固相萃取预富集-原子吸收联用测定痕量Fe(Ⅱ)和总铁量 被引量:16
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作者 徐光明 叶映雪 +2 位作者 殷学锋 沈宏 Akbar Ali 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2000年第3期350-353,共4页
以 1 ,1 0 -二氮菲 (1 ,1 0 -phen)为配合剂 ,乙醇为洗脱液 ,在 C1 8柱上将流动注射固相萃取预富集 -原子吸收光谱联用测定痕量 Fe( )和总铁 .Fe( )的含量可通过抗坏血酸还原后用差示法测得 .本法灵敏度高 ,选择性好 ,能在线分离干扰富... 以 1 ,1 0 -二氮菲 (1 ,1 0 -phen)为配合剂 ,乙醇为洗脱液 ,在 C1 8柱上将流动注射固相萃取预富集 -原子吸收光谱联用测定痕量 Fe( )和总铁 .Fe( )的含量可通过抗坏血酸还原后用差示法测得 .本法灵敏度高 ,选择性好 ,能在线分离干扰富集 Fe( ) ,采样速度 80次 / h,富集倍数 1 9倍 ,检测下限为 3μg/ L,相对标准偏差 1 .1 % (n=1 0 ) ,可用于测定水样中痕量 Fe( )和 Fe( ) ,回收率为 94 %~ 1 0 5% 展开更多
关键词 流动注射 原子吸收 在线预富集 铁测定 痕量分析
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流动注射在线分离富集火焰原子吸收法测定环境样品中的铅和镉 被引量:22
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作者 王爱霞 张宏 刘琳琳 《分析化学》 SCIE EI CAS CSCD 北大核心 2001年第11期1284-1287,共4页
使用PT C1 8色谱预处理柱 ,以二乙基二硫代氨基甲酸钠 (DDTC)和吡咯啶二硫代氨基甲酸铵(APDC)混合物为螯合剂 ,甲醇为洗脱剂 ,采用流动注射在线分离富集与原子吸收联用技术 ,对铅和镉的测定进行了研究。 1min富集 (4.2mL) ,检出限 :Pb为... 使用PT C1 8色谱预处理柱 ,以二乙基二硫代氨基甲酸钠 (DDTC)和吡咯啶二硫代氨基甲酸铵(APDC)混合物为螯合剂 ,甲醇为洗脱剂 ,采用流动注射在线分离富集与原子吸收联用技术 ,对铅和镉的测定进行了研究。 1min富集 (4.2mL) ,检出限 :Pb为 6 .90 μg L ;Cd为 0 .45 μg L ,相对标准偏差 :Pb为2 80 % ;Cd为 2 .47% 展开更多
关键词 流动注射 火焰原子吸收法 色谱预处理柱 环境样品 测定 分离 富集 铅镉
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用流动注射氢化物原子吸收法测定土壤中的砷和沉积物中的汞 被引量:9
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作者 赵兴敏 董德明 +1 位作者 王文涛 花修艺 《吉林大学学报(理学版)》 CAS CSCD 北大核心 2009年第6期1303-1308,共6页
在选择了样品最佳消化方法、砷化氢和汞蒸气生成及检测最佳条件的基础上,将流动注射与氢化物原子吸收光谱法相结合,建立了土壤中砷和沉积物中汞质量浓度的测定方法.结果表明,流动注射氢化物原子吸收法测定土壤中砷的检出限为2 ng/L,精... 在选择了样品最佳消化方法、砷化氢和汞蒸气生成及检测最佳条件的基础上,将流动注射与氢化物原子吸收光谱法相结合,建立了土壤中砷和沉积物中汞质量浓度的测定方法.结果表明,流动注射氢化物原子吸收法测定土壤中砷的检出限为2 ng/L,精密度为1.36%-5.08%,准确度为93.6%-106.1%.测定沉积物中汞的检出限为3 ng/L,精密度为0.97%-5.53%,准确度为93.2%-109.6%.流动注射氢化物原子吸收法简便、快速,分析精密度和准确度均满足环境样品的分析测试要求,可以用于土壤中砷和沉积物中汞的测定. 展开更多
关键词 流动注射氢化物原子吸收法 土壤 沉积物
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流动注射在线液-液萃取原子吸收光谱法测定生物样品中的铅 被引量:9
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作者 帅琴 梁永东 +2 位作者 胡圣虹 金泽祥 林守麟 《分析试验室》 CAS CSCD 1997年第3期57-59,共3页
本文利用所设计的一种新型流动注射液-液萃取重力分相器,建立了流动注射溶剂萃取原子吸收光谱法测定铅的新方法。详细地研究了流动注射在线萃取的实验条件及流路系统。方法的精密度和检出限分别为2.5%(n=11)和2.8μg/... 本文利用所设计的一种新型流动注射液-液萃取重力分相器,建立了流动注射溶剂萃取原子吸收光谱法测定铅的新方法。详细地研究了流动注射在线萃取的实验条件及流路系统。方法的精密度和检出限分别为2.5%(n=11)和2.8μg/L(k=3)。用拟定的方法测定了峰蛹、粮食等生物样品中的铅,结果与参考值相吻合。 展开更多
关键词 流动注射 萃取 原子吸收光谱法
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流动注射在线置换吸附预富集-火焰原子吸收联用技术测定痕量铅 被引量:9
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作者 韩得满 贾文平 +1 位作者 梁华定 严秀平 《分析化学》 SCIE EI CAS CSCD 北大核心 2007年第11期1643-1646,共4页
研究了流动注射在线置换吸附预富集-火焰原子吸收(FAAS)联用技术测定复杂样品中痕量铅的方法。首先使ZnⅡ与二乙基二硫代氨基甲酸钠(DDTC)在线配合形成Zn-DDTC并预先吸附在香烟过滤嘴填充柱上,然后使含PbⅡ的标准溶液或样品溶液流经填... 研究了流动注射在线置换吸附预富集-火焰原子吸收(FAAS)联用技术测定复杂样品中痕量铅的方法。首先使ZnⅡ与二乙基二硫代氨基甲酸钠(DDTC)在线配合形成Zn-DDTC并预先吸附在香烟过滤嘴填充柱上,然后使含PbⅡ的标准溶液或样品溶液流经填充柱与Zn-DDTC发生置换反应而被填充柱富集。被吸附的分析物用乙醇定量洗脱至FAAS进行在线检测。此在线置换吸附预富集过程有效地消除了与DDTC的配合物稳定性较Zn-DDTC弱的共存金属离子的干扰。在样品流速为5.0mL/min和置换吸附预富集90s的条件下,得到铅的吸收信号的增感因子为33,检出限为2.0μg/L。浓度为100μg/L的铅标准溶液11次平行测定的精密度(RSD)为1.2%。本方法已应用于生物样品的分析。 展开更多
关键词 流动注射 置换吸附预富集 火焰原子吸收光谱法
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流动注射原子吸收光谱法测定富硒天麻、葡萄及大米中的硒 被引量:17
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作者 邓世林 李新凤 郭小林 《分析试验室》 CAS CSCD 北大核心 2003年第2期54-56,共3页
建立了流动注射氢化物发生 原子吸收光谱法测定富硒天麻、葡萄及大米中硒的方法。测定硒的线性范围为 0 .33μg/L~ 5 0 μg/L ,相对标准偏差小于3% ,加标回收率为 93%~ 1 0 6%。
关键词 流动注射 原子吸收光谱法 测定 富硒 天麻 葡萄 大米 食品检测
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