徐淑坤
流动注射和顺序注射分析
个性化签名
- 姓名:徐淑坤
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
勘查地质学
- 研究兴趣:流动注射和顺序注射分析
徐淑坤教授,1970年毕业于北京大学化学系, 1982年获硕士学位。1997年任东北大学教授。2002年任博士生导师。1994年获政府特殊津贴。2001年为“冶金分析”编委。
其研究方向为流动注射和顺序注射分析。现在根据学科发展的需要,在原有流动分析的基础上拓展出一个新的研究方向:半导体纳米晶体生物探针的开发和应用。
在流动分析与原子光谱分析研究中取得比较显著的研究成果。参加或主持7项国家自然科学基金课题,曾获国家自然科学三等奖一项,中科院自然科学二等奖两项,辽宁省自然科学一等奖一项。在国内外重要学术刊物上发表论文80余篇;出版两部译著: "流动注射分析"第一,第二版;合作出版两部专著“流动注射分析法”和“分析化学”,参加专著"分析仪器手册"和"当代化学前沿"的编写工作。兼任冶金分析杂志编委。培养15名硕士生,其中有9名已获得学位。现有在读博士生三名。
国际交流情况:
1986年3-4月份,去瑞典进行流动注射分析仪器维修培训;
1990年至1991年去德国Perkin-Elmer公司合作研究半年;
1998年3月去美国参加匹茨堡分析化学大会;
2000年去德国合作研究两个月;
2002年10月去美国参加第二届分析化学与光谱联盟年会(FACSS);
2003年10月-2004年9月,加拿大国家研究院合作研究一年。
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徐淑坤, 马泓冰, 樊晓峰
,-0001,():
-1年11月30日
简述了流动注射原子光谱联用技术及其在矿冶分析中的应用。内容包括:流动注射与原子吸收光谱分析、ICP-AES 和ICP-MS联用系统及其在矿物、冶金分析领域中的应用及发展。引用文献61篇。
流动注射, 原子光谱, 冶金分析, 矿物分析
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徐淑坤, Xiaoguang Du
Fresenius J Anal Chem (2001),-0001,():
-1年11月30日
Volatile Au species in an acidified medium were generated at room temperature by reduction with NaBH4 in acidified aqueous medium using a flow-injection chemical vapor-generation atomic absorption spectrometric (FI-CVG-AAS) system in the presence of micro amounts of sodium diethyldithiocarbamate (DDTC). Precision of 2.0% RSD (n=11, 2.0mg L-1 level) was obtained at a sample throughput of 180h-1. A detection limit of 24ng mL-1 (3σ) was obtained with 300µL sample solution. The method was used for the determination of gold in ore sample digests, and the results obtained agreed well with those obtained by flame AAS.
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徐淑坤, Xu Shukun*, Zhou Huanying, Du Xiaoguang and Zhu Daan
,-0001,():
-1年11月30日
Volatile species of Cu, Au and Tl were generated at room temperature by the reduction of NaBH4 in acidified aqueous medium using a flow injection vapor generation atomic absorption spectrometric (FI-VGAAS) system. 1, 10-phenanthroline, sodium diethanlydithiocarbonate (DDTC) and palladium (or combined with Rodamne B) ware used as enhancement reagents respectively. The normal flow injection peak shape wase obtained and the sensitivity were enhanced by 1-2 magnitude. The detection limits of 0.34-24ng/ml (3σ) were obtained with 300 or 500µl sample solution. The precision of 2.6-1.8% RSD were obtained with the sampling frequencies were of 120-180/h. The FI-VGAAS methods were used for the determination of copper in hair and rice sample and gold in the ore sample digests.
chemical vapor generation AAS,, flow injection,, copper,, gold,, thallium,, enhancement reagent.,
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徐淑坤, Hongbing Ma, Xiaofeng Fan, Huanying Zhou, Shukun Xu*
Spectrochimica Acta Part B 58(2003)33-41,-0001,():
-1年11月30日
Volatile species of gold in acidified medium were generated at room temperature by the reduction of NaBH using 4 a flow injection vapor generation (FI-VG) system, and trapped in situ on the graphite furnace inner wall to get ETAAS detection. Reaction coil inner-wall and inside of the gas-liquid separator were conditioned by passing through a liquid containing micro amounts of Pd(II) and sodium diethyldithiocarbamate (DDTC) and NaBH. The FI manifold 4 design, the precondition of the FI-VG system and the effect of temperature parameters for ETAAS are discussed. Optimization of the FI and chemical parameters, such as effect of sample acidity, effect of sodium tetrahydroborate concentration, effects of the flow rates for sample, reagent and carrier gas, effects of HCl and DDTC concentration in rinsing solution were investigated. A detection limit of 0.8 ngyml (3s) was obtained with a 40 s trapping time and a sampling frequency of 50yh. The precision of 2.2% R.S.D. (ns11) was obtained at 50 ngyml level. The method was used for the determination of gold in ore sample digest solution. The recoveries of gold in ore sample digest dilute solution by spiking of 25 ngyml gold were 90-106%. The results obtained were in good agreement with those obtained from direct ETAAS.
Electrothermal atomic absorption, In situ trapping, Flow-injection, Gold
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徐淑坤, Zhu Daan and Xu Shukun*
Atomic Spectroscopy Vol. 21(4), July/August 2000,-0001,():
-1年11月30日
A flow injection hydride generation atomic absorption spectrometric (FI-HGAAS) method was developed for the determination of thallium at the ng mL-1 levels. Palladium, an effective enhancement reagent, was added to the acidified sample solution. The presence of micro amounts of Rhodamine B increased the hydride generation efficiency further. The acidified sample solution containing palladium and Rhodamine B merged with the aqueous sodium tetrahydroborate solution at room temperature. The generated gaseous phase was separated in a gasexpanded gas-liquid separator and was led directly into a quartz tube atomizer at 1000℃ via the Ar carrier gas for detection by AAS.
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徐淑坤, Shukun Xu, Lijing Sun and Zhaolun Fang *
Analytica Chimica Acta, 245(1991)7-11,-0001,():
-1年11月30日
Gold in ores was determined by flame atomic absorption spectrometry following on-line preconcentration by sorbent extraction in a flow-injection system. The medium polarity adsorption resin Amberlite XAD-8 packed in a 220μ1 micro-column was used to collect gold (II1) from hydrochloric acid sample solutions for 40 s at 7.6ml/mm. Ethanol was used to elute the adsorbed analytes into the nebulizer. Optimization studies were made on sample loading rate, elution rate and sample acidity. Some possible interferences on the determination are discussed. A 35-fold enrichment was achieved at a sampling frequency of 60h-1 and with an RSD of 1.48. The detection limit (30) and 2. bg 1-l. Results for gold in ore samples showed good agreement with those obtained using activated carbon adsorption preconcentration. The recoveries were 97-108s.
Atomic absorption spectrometry, Flow system, Gold, Ores, Preconcentration
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【期刊论文】A Microsampling System for Flame Atomic Absorption Spectrometry Using Hydrodynamic lnjection
徐淑坤, SHUKUN Xu AND ZHAOLUN FANG
MICROCHEMICAL JOURNAL 51, 360-366 (1995),-0001,():
-1年11月30日
A flow injection microsample introduction system for flame atomic absorption spectrom-etry is developed based on air-transported sample loading and hydrodynamic injection. An augmenting water stream was used between sample loop and nebulizer to prevent distur-bances from nebulizer suction during sample loading. A total of 0.8ml of sample was sufficient for triplicate measurements, including washout between samples, and achieving the sensitivity of conventional steady-state measurements. The system was applied to the determination of copper in serum samples at a sampling frequency of 100/h and with a presision of about 2% rsd.
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【期刊论文】APPLICATION OF THE SLOTTED QUARTZ TUBE IN FLOW-INJECTION FLAME ATOMIC-ABSORPTION SPECTROMETRY
徐淑坤, SHUKUN Xu, LIJING SUN and ZHAOLUN FANG*
Talanta, 39, 6, 581-587, 1992,-0001,():
-1年11月30日
The slotted quartz tube has been applied to flow-injection flame atomic-absorption spec-trometry (FI-FAAS) showing several important advantages. The tube life was improved by a factor of 5d compared to conventional continuous aspiration. Flow impact systems were found not to be necessary ain the applications so that larger enhancement factors may be achieved without sacrifice in precision. For 1.0mg/l. copper, 1.0mg/l. lead, 0.1mg/l. cadmium and 1.0mg/l. gold sensitivity enhancement factors of 3.1, 5.5, 5.3 and 4.0 were obtained with precisions of 1.3%, l.l%, 1.6% and 1.7% RSD (n=11) respectively. Application of the slotted quartz tube FI-FAAS method to the determination of heavy metals in urine has shown improved tolerance to interfering matrices. Recoveries obtained by spiking undiluted urine samples with 0.1mg/l. copper and lead, and 0.01mg/l. cadmium were in the range lOO-102%.
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徐淑坤, Zhang-Run Xu, Hong-Yan Pan, Shu-Kun Xu, Zhao-Lun Fang*
Spectrochimica Acta Part B 55(2000)213-219,-0001,():
-1年11月30日
A sequential injection system for on-line sorbent extraction preconcentration in electrothermal atomic absorption spectrometry was developed for the determination of trace cadmium in seawater and other water samples. The system is characterized by simple manifold design and improved robustness. The Cd-APDC complex was sorbed on a. 15-ml micro-column located at the tip of the furnace sampling probe packed with C. After sequentially metering 18 segments of ethanol, washing acid, sample and APDC complexing reagent into a 2.5-m-long, 1-mm-i.d. holding coil, the flow was reversed and directed to the column. The complexing reaction, sample loading and column washing were then achieved within the single reversed syringe stroke. The sorbed analyte was then eluted into the furnace with 50ml ethanol. Mutual mixing between sample, washing acid, and eluent were prevented by separating the zones with small air segments during metering. Progressive tightening of the column was avoided by a short back-suction through the column after each operational cycle. With 1ml sample loaded, and 50ml eluate introduced into the y1. furnace, an enrichment factor of 19 was obtained with a detection limit of 0.5ng l Cd 3s, a precision of 2.1%. y1 R.S.D. ns11, and a throughput of 12h. Good recoveries were obtained for spiked water samples and good agreement of results with standard reference seawater and river water samples were achieved.
Sequential injection, Electrothermal atomic absorption spectrometry, Preconcentration, Sorption extraction, Cd, Seawater
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【期刊论文】流动注射氨性样品溶液注入蒸气发生原子吸收法测银的初步研究
徐淑坤, 周焕英, 马泓冰, 徐淑坤*
,-0001,():
-1年11月30日
对银的流动注射氨性样品溶液注入蒸气发生原子吸收光谱分析方法进行了初步研究。观察到银可在流动注射氨性样品溶液注入氢化物发生条件下生成挥发性气态物质。经过对银气态物质发生的化学条件,如样品溶液中氨的浓度,载流溶液的酸度,硼氢化钠浓度等以及流动注射参数如反应管道长度,载流和试剂溶液流速,载气流速等的优化,初步建立了银的氨性样品溶液注入流动注射蒸气发生原子吸收光谱分析方法。在500µl试样体积和120样/小时的采样频率下得到1.5µg/L银的检出限(3σ),测定的RSD为2.6%(100µg/L, n = 11),初步研究了共存离子的干扰。对自来水,水库水中加入银的回收率为100-102%。同时对定影液中的的银进行了测定,并与火焰原子吸收进行了对照实验,结果基本相符。
银, 原子吸收光谱, 流动注射蒸气发生, 氨性样品,
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