孙汉文
主要致力于原子光谱、形态分析、药物与食品分析、生态环境分析领域的研究
个性化签名
- 姓名:孙汉文
- 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:主要致力于原子光谱、形态分析、药物与食品分析、生态环境分析领域的研究
孙汉文,1945年生,教授,博士研究生导师。从事化学教学与科研工作至今已三十五年,曾获省部级自然科学二等奖1项、省部级科技进步二等奖2项、省部级科技成果三等奖2项、省部级教学研究成果一等奖3项。
作为河北省重点学科分析化学带头人,于1998年取得全国地方高校第一个分析化学博士学位授权点,2003年取得化学博士后科研流动站。分析化学硕士点曾被评为省优秀硕士点,分析化学被评为省优秀重点学科。分析化学实验室于2002年升级为河北省分析科学技术重点实验室。
现任河北大学学术委员会主任,分析化学博士导师组组长,化学博士后流动站站长,河北省分析科学技术重点实验室主任,河北省重点学科分析化学带头人,河北省强势学科化学学科带头人。
主要致力于原子光谱、形态分析、药物与食品分析、生态环境分析领域的研究。就原子光谱分析新理论、新概念、新技术、新方法进行创新研究,提出了导数原子光谱分析新技术,取得了原始创新性成果,达到国际领先水平,2004年获河北省自然科学二等奖。
现已培养出35名分析化学硕士、12名分析化学博士。在国内外发表学术论文200 余篇,其中被SCI、EI收录95篇.出版《原子吸收光谱分析技术》(中国科技出版社)、《光谱学与痕量分析研究》(河北大学出版社)、《原子光谱分析》(高等技术出版社)、《分析化学研究进展》(河北大学出版社)、《现代科学技术概论》(中国经济出版社)等著作。
学术任职包括:河北大学学术委员会主任,中国化学会理事,中国化学会分析化学专业委员会委员,中国化学会化学教育专业委员会委员,河北省化学会理事长,河北省食品安全协会会长。《光谱学与光谱分析》副主编,《河北大学学报(自然科学版)》主编,《化学学报》审稿人,《分析化学》审稿人。
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2269
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330
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成果数
7
孙汉文, Zhanfeng Liu a, Hanwen Sun a, ∗, Shigang Shen a, Liqing Li a, b, Hongmei Shi a
Analytica Chimica Acta 550(2005)151-155,-0001,():
-1年11月30日
By HG-AFS, a new method was proposed for simultaneous determination of total arsenic and total selenium existed in the Chinese medicinal herbs in tartaric acid medium. The effects of analytical conditions and coexisting ions on the fluorescence signal intensity of analytes were investigated. The proposed method was provided with linear response ranges above 22µg l−1 for As and 44 µg l−1 for Se, and the detection limits of 0.13 and 0.12 µg l−1 were obtained for As and Se respectively. The recoveries of 93.8-96.1% for As and 95.3-99.1% for Se, and the precision of 1.2-3.8% and 2.4-5.3% (R.S.D., n=8) respectively, were obtained via simultaneous determined four samples of Chinese medicinal herbs and three certified botanic reference materials successfully. The proposed method has the advantages of simple operation, high sensitivity and high efficiency.
Simultaneous determination, Arsenic, Selenium, Chinese medicinal herbs, Atomic fluorescence spectrometry
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【期刊论文】Derivative Flame Atomic Absorption Spectrometry and Its Application in Trace Analysis
孙汉文, H.W. Sun* and L.Q. Li
Journal of the Iranian Chemical Society, Vol. 2, No.4, December (2005), pp. 268-276.,-0001,():
-1年11月30日
Flame atomic absorption spectrometry (FAAS) is an accepted and widely used method for the determination of trace elements in a great variety of samples. But its sensitivity doesn't meet the demands of trace and ultra-trace analysis for some samples. The derivative signal processing technique, with a very high capability for enhancing sensitivity, was developed for FAAS. The signal models of conventional FAAS are described. The equations of derivative signals are established for FAAS, flow injection atomic absorption spectrometry (FI-FAAS) and atom trapping flame atomic absorption spectrometry (AT-FAAS). The principle and performance of the derivative atomic absorption spectrometry are evaluated. The derivative technique based on determination of variation rate of signal intensity with time (dI/dt) is different from the derivative spectrophotometry (DS) based on determination of variation rate of signal intensity with wavelength (dI/dλ). Derivative flame atomic absorption spectrometry (DFAAS) has higher sensitivity, lower detection limits and better accuracy. It has been applied to the direct determination of trace elements without preconcentration. If the derivative technique was combined with several preconcentration techniques, the sensitivity would be enhanced further for ultra-trace analysis with good linearity. The applications of DFAAS are reviewed for trace element analysis in biological, pharmaceutical, environmental and food samples.
Signal models, Derivative technique, Atomic absorption spectrometry, Analytical performance, Trace analysis
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孙汉文, Han-Wen Suna, Ran Suoa, b, ∗
Analytica Chimica Acta 509(2004)71-76,-0001,():
-1年11月30日
Simultaneous vapor generation of zinc (Zn) and cadmium (Cd) was evaluated by atomic fluorescence spectrometry coupled with an intermittent flow vapor generation system. Some complexing reagents, surfactant and transition metal ions were respectively tested as enhancement reagents. Experiments showed that an appropriate amount of 8-hydroxyquinoline or phenanthroline and nickel ion simultaneously, effectively improved the vapor generation efficiency of Zn and Cd. The volatile species generation was presumed to be a hydrogenation process interpreting how the enhancement reagents played an important role in vapor generation. Additionally, due to the instability of volatile species, reaction temperature, rapid and sufficient mixing of reagents and rapid separation of the volatile species from liquid phase were also crucial. The method of simultaneous determination of Zn and Cd by intermittent flow vapor generation led to the development of atomic fluorescence spectrometry. The detection limits (3σb) were 1.6μg l−1 for Zn and 0.01μg l−1 for Cd and the relative standard deviations were 3.6% for Zn (50μg l−1, n=11) and 1.7% for Cd (2μg l−1, n=11) respectively. Results for the determination of Zn and Cd have been confirmed by the analysis of CRMs with good agreement between the certified and found values.
Enhancement reagent, Vapor generation, Atomic fluorescence spectrometry, Zinc and cadmium
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孙汉文, Han-wen Sun∗, Feng-xia Qiao, Ran Suo, Li-xin Li, Shu-xuan Liang
H.-w. Sun et al./Analytica Chimica Acta 505(2004)255-261,-0001,():
-1年11月30日
A new method was developed for simultaneous determination of trace arsenic and antimony in Chinese herbal medicines by hydride generation-double channel atomic fluorescence spectrometry with a Soxhlet extraction system and an n-octanol-water extraction system, respectively. The effects of analytical conditions on the fluorescence intensity were investigated and optimized. A water-dissolving and methanol-water-dissolving capability were compared. The contents of different species in five Chinese herbal medicines and their decoctions were analyzed. The concentration ratios of n-octanol-soluble As or Sb to water-soluble As or Sb were related to the kinds of medicine and the acidity of the decoction. Soxhlet extraction was found to be an effective method for plants pretreatment for determination of arsenic and antimony species in Chinese herbs; the interferences of coexisting ions were evaluated. The proposed method has the advantages of simple operation, high sensitivity and high speed, with 3σ detection limits of 0.094µgg−1 for As(III), 0.056µgg−1 for total As, 0.063µgg−1 for Sb(III) and 0.019µgg−1 for total Sb in a 1.0g of the sample.
Speciation, Chinese herbal medicine, Arsenic, Antimony, Hydride generation, Atomic fluorescence spectrometry
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孙汉文, XiuYan Pang, HanWen Sun*, YanHuan Wang
Chromatographia 2003, 57, April (No.7/8): 543-547,-0001,():
-1年11月30日
A reversed-phase ionpair chromatographic method with tetramethylene oxide as organic modifier has been developed for the simultaneous separation and detection of the sulfides NH2CSNH2, (NH4)2CS3, (NH4)2S, and NH4SCN. The optimized separation conditions were determined by means of a U7(76) uniform design experiment, and tetramethylene oxide played an important role in adjusting the retention behavior of(NH4)2S and NH4sSCN. The linearity of the calibration plots for the four components was investigated; correlation coefficients were from 0.9989-0.9999. The proposed method was successfully applied to the determination of NH2CSN H2, (NH4)2CS3, (NH4)2S, and NHSCN in synthesis and isomerization samples.
Column liquid chromatography, Ion-pair chromatography, Sulfides, Tetramethylene oxide, Synthesis and isomerization system
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孙汉文, H-W. Sun a, *, W-J. Kang b, J. Ha c, S-X. Liang a, S-G. Shen a
Journal of the Iranian Chemical Society, Vol. 1, No.1, September (2004), pp. 40-46.,-0001,():
-1年11月30日
The species of Cr(III) and Cr(VI) in water samples were determined by flow injection on-line preconcentration and separation on two-microcolumn system-derivative flame atomic absorption spectrometry during a collaborative analysis for certification. The Cr(III) and Cr(VI) in water samples were retained on two microcolumns with ion exchange resin and were eluted directly to nebulizer by 15% HNO3 and 8% NH4NO3, respectively. The characteristic concentration (at the sensitivity grade of 2 mV min-1 for 1 min of preconcentration time) for Cr(III) and Cr(VI) were 0.130 and 0.0985 μg l-1, in the order which were 332- and 431-fold better than those of FAAS, and 45- and 47-fold better than those of FI-FAAS, respectively. The relative standard deviations were 3.27% and 3.66% with corresponding detection limits (3σ) of 0.244 and 0.235 μg l-1, respectively. The linear ranges of determinations for Cr(III) and Cr(VI) were 0~100 μgm l-1 with correlation coefficients of 0.9984 to 0.9996. The satisfactory recovery of 94.4%~106% for Cr(III) and Cr(VI) could be obtained from water samples.
Flow injection,, On-line preconcentration,, Derivative flame atomic absorption spectrometry,, Chromium(, III), ,, Chromium(, VI),
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孙汉文, Yun-kai Lü, †, ‡ Han-Wen Sun, ‡ Chun-Gang Yuan, ‡ and Xiu-Ping Yan*
Anal. Chem. 2002, 74, 1525-1529,-0001,():
-1年11月30日
Hydride generation atomic fluorescence spectrometry (HG-AFS) has been used for determination of hydride-forming elements because of its high sensitivity, simplicity, and low costs, but most of such work has been concentrated on single element analysis, and reports dealing with multielement determination by HG-nondispersive (ND)AFS are rare. In this work, a sensitive HGNDAFS method was developed for simultaneous determination of trace cadmium and arsenic in biological materials. The conditions for the generation of volatile cadmium and arsenic species from the reaction with KBH4 in aqueous solution were investigated using a double-channel AFS integrated with an intermittent flow reactor. Like thiourea and Co(II), ascorbic acid was found to significantly enhance the generation efficiency of volatile Cd and As species. The interferences of coexisting ions were evaluated. Under optimal conditions, the detection limits for Cd and As were determined to be 10 and 150 ng L-1, respectively. The precision for 11 replicate determinations at the 1 μg L-1 Cd level and the 10 μg L-1 As level were 3.5 and 2.7% (RSD), respectively. The recoveries of spike analytes in the biological samples studied ranged from 94 to 109%. The proposed method was successfully applied to the simultaneous determination of Cd and As in a variety of biological samples.
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