Trace determination of zirconium by adsorptive anodic stripping voltammetry of its complex with alizarin violet using a glassy carbon electrode modified with acetylene black-dihexadecyl hydrogen phosphate composite film
作者：
Deng, Peihong* ;Feng, Yonglan;Fei, Junjie
期刊：
Microchimica Acta ,2011年175(3-4):233-240 ISSN：0026-3672
通讯作者：
Deng, Peihong
作者机构：
[Deng, Peihong; Feng, Yonglan] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Fei, Junjie] Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China.
通讯机构：
[Deng, Peihong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Zirconium;Acetylene black;Dihexadecyl hydrogen phosphate;Alizarin violet;Adsorptive anodic stripping voltammetry
摘要：
We report on a novel electrochemical method for the sensitive determination of trace zirconium (Zr) at a glassy carbon electrode modified with a film of acetylene black containing dihexadecyl hydrogen phosphate and in the presence of alizarin violet (AV). The method is based on the preconcentration of the Zr(IV)-AV complex at a potential of -200 mV (vs. SCE). The adsorbed complex is then oxidized, producing a response with a peak potential of 526 mV. Compared to the poor electrochemical signal at the unmodified GCE, the electrochemical response of Zr(IV)-AV complex is greatly improved, as confirmed by the significant increase in peak current. The effects of experimental conditions on the oxidation current were studied and a calibration plot established. The oxidation current is linearly related to the Zr(IV) concentration in the 8.0 pM to 10 nM concentration range (c AV = 0.2 μM) and 10 nM ~0.6 μM (c AV = 2.0 μM), and the detection limit (S/N = 3) is as low as 4.0 pM for a 3-min accumulation time. The method was successfully employed to the determination of zirconium in standard ore samples. © 2011 Springer-Verlag.
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英文
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铋膜修饰玻碳电极用于线性扫描溶出伏安法测定铝箔中痕量镓
作者：
匡云飞;邹建陵;冯泳兰;邓培红;凌爱华;...
期刊：
理化检验-化学分册 ,2011年47(1): 15-17,20 ISSN：1001-4020
作者机构：
衡阳师范学院,化学与材料科学系,衡阳,421008;[杨颖群; 冯泳兰; 匡云飞; 邹建陵; 刘梦琴; 邓培红; 屈景年; 凌爱华; 李薇] 衡阳师范学院
关键词：
铋膜修饰玻碳电极;线性扫描溶出伏安法;铝箔;镓
摘要：
用电化学沉积法将铋离子修饰在玻碳电极上,应用此铋膜修饰玻碳电极测定镓时,将试液在pH 5.4的六次甲基四胺-盐酸缓冲溶液中在-1.30 V处预还原40 s,然后在-1.30--0.50 V范围内扫描,使镓离子从修饰电极上溶出,实现了镓离子的溶出伏安法测定,在-1.01 V处可得镓离子的氧化峰电位,镓的质量浓度在0.002 8-0.21μg·L^-1范围内与其峰电流值呈线性关系,方法的检出限（3S/N）为0.7 ng·L^-1。方法用于测定铝箔中镓的含量,加标回收率在98.2%-103.8%之间。
语种：
中文
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Sensitive voltammetric determination of tryptophan using an acetylene black paste electrode modified with a Schiff's base derivative of chitosan
作者：
Deng, Peihong* ;Fei, Junjie;Feng, Yonglan
期刊：
ANALYST ,2011年136(24):5211-5217 ISSN：0003-2654
通讯作者：
Deng, Peihong
作者机构：
[Deng, Peihong; Feng, Yonglan] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Fei, Junjie] Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China.
通讯机构：
[Deng, Peihong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
摘要：
Chitosan was modified by salicylaldehyde via Schiff's base reaction and the resulting product was modified on the surface of an acetylene black paste electrode (ABPE) by the drop-coating method. In 0.5 mol L~(-1) acetate buffer (pH 4.2), a substantial increase in the anodic stripping peak current of tryptophan (Trp) (compared to conventional bare carbon paste electrode (CPE) and bare ABPE) is observed at the Schiff's base chitosan-modified electrode. The parameters influencing voltammetric determination of Trp have been optimized. Under the selected conditions, the linearity between the anodic peak currents and concentrations of Trp demonstrated a wide range of 6.0 × 10 ~(-8) mol L-1 to 2.0 × 10~(-6) mol L -1, 2.0 × 10~(-6) mol L-1 to 4.0 × 10~(-5) mol L~(-1) and 4.0 × 10~(-5) mol L ~(-1) to 1.0 × 10~(-4) mol L~(-1), a low detection limit of 2.0 × 10~(-9) mol L~(-1) was obtained after a 60 s accumulation. In addition, the developed electrochemical sensor has been successfully applied for the determination of Trp in pharmaceutical and biological samples with satisfactory assay results. This journal is
语种：
英文
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Determination of molybdenum by adsorptive anodic stripping voltammetry of molybdenum–alizarin violet complex at an acetylene black paste electrode
作者：
Deng, Peihong* ;Fei, Junjie;Zhang, Jun;Feng, Yonglan
期刊：
Food Chemistry ,2011年124(3):1231-1237 ISSN：0308-8146
通讯作者：
Deng, Peihong
作者机构：
[Deng, Peihong; Feng, Yonglan; Zhang, Jun] Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.;[Fei, Junjie] Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China.
通讯机构：
[Deng, Peihong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.
关键词：
Acetylene black paste electrode;Adsorptive anodic stripping voltammetry;Alizarin violet;Molybdenum determination
摘要：
A reliable and sensitive procedure for the determination of trace levels of molybdenum by adsorptive anodic stripping voltammetry is proposed. The method is based on adsorptive accumulation of the molybdenum (Mo)-alizarin violet (AV) complex onto an acetylene black paste electrode (ABPE), followed by oxidation of the adsorbed species by voltammetric scan using a second-order derivative modulation. For voltammetric determination of molybdenum, the parameters influencing the peak current have been optimized. Under the selected conditions, the electrode demonstrated linear response over a wide range of Mo(VI) concentration (6.0×10-9-1.0×10-5mol/L), the detection limit was 2.0×10-9mol/L (S/N=3) for 120s accumulation. The effects of potential interfering ions were studied, and it was found that the proposed procedure was free from most interferences. The method has been applied to the determination of molybdenum in plant foodstuffs, and satisfied results were obtained. © 2010 Elsevier Ltd.
语种：
英文
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Determination of trace aluminum by anodic adsorptive stripping voltammetry using a multi-walled carbon nanotube modified carbon paste electrode
作者：
Deng, Peihong* ;Fei, Junjie;Zhang, Jun;Feng, Yonglan
期刊：
Analytical Letters ,2011年44(8):1521-1535 ISSN：0003-2719
通讯作者：
Deng, Peihong
作者机构：
[Deng, Peihong; Feng, Yonglan; Zhang, Jun] Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.;[Fei, Junjie] Xiangtan Univ, Coll Chem, Key Lab Environm Friendly Chem & Applicat Minist, Xiangtan, Peoples R China.
通讯机构：
[Deng, Peihong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.
关键词：
Alizarin violet;Aluminum determination;Anodic adsorptive stripping voltammetry;Modified electrode;Multi-walled carbon nanotubes
摘要：
The adsorptive voltammetric behavior of the aluminum (Al)-alizarin violet (AV) complexin 0.2 molL-1 HAc-NaAc buffer (pH 4.5) at a multi-walled carbon nanotube modified carbon paste electrode (MWCNT/CPE) was investigated. The results showed that the complex can be adsorbed on the surface of the MWCNT/CPE, yielding one oxidation peak at 530mV (vs. SCE). The proposed method exhibits good linearity over the range from 1.0x10-9 mol L-1 to 1.0x10-7 mol L-1, and a low detection limit of 6.0x10-10 molL-1 for 120 s accumulation was obtained under optimum conditions. © Taylor & Francis Group, LLC.
语种：
英文
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羧基化短碳纳米管修饰碳糊电极方波溶出伏安法测定尿酸
作者：
匡云飞;邹建陵;邓培红;冯泳兰;许金生;...
期刊：
化学试剂 ,2011年33(1):47-50 ISSN：0258-3283
作者机构：
[匡云飞; 邹建陵; 邓培红; 冯泳兰; 许金生; 杨颖群; 李薇] 衡阳师范学院化学与材料科学系
关键词：
方波溶出伏安法;尿酸;羧基化短碳纳米管;修饰电极
摘要：
研究了尿酸在羧基化短碳纳米管修饰碳糊电极上的伏安行为.结果表明:在0.20 mol/L磷酸盐(pH 5.79)介质中,此修饰电极对尿酸具有较好的电催化活性,该氧化峰的二阶导数峰电流与尿酸浓度在7.0×10-7~1.0×10-5mol/L范围内呈线性关系,相关系数为0.998 8,检出限(S/N=3)为3.0×10-7mol/L.用该法直接测定某样品中尿酸,结果满意
语种：
中文
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A new electrochemical method for the determination of trace molybdenum(VI) using carbon paste electrode modified with sodium dodecyl sulfate
作者：
Deng, Pei-hong* ;Feng, Yong-lan;Fei, Jun-jie
期刊：
Journal of Electroanalytical Chemistry ,2011年661(2):367-373 ISSN：1572-6657
通讯作者：
Deng, Pei-hong
作者机构：
[Feng, Yong-lan; Deng, Pei-hong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.;[Fei, Jun-jie] Xiangtan Univ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China.
通讯机构：
[Deng, Pei-hong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
关键词：
Molybdenum;Morin;Sodium dodecyl sulfate;Carbon paste electrodes;Adsorptive anodic stripping voltammetry
摘要：
A sensitive procedure was developed for the determination of trace molybdenum(VI) by adsorptive anodic stripping voltammetry based on the oxidation of molybdenum(VI)-2′,3,4′,5,7-pentahydroxyflavone (morin) complex at a sodium dodecyl sulfate modified carbon paste electrode (denoted as SDS/CPE). Compared with the poor response at a conventional paste electrode, the electrooxidation of molybdenum(VI)-morin complex at the SDS/CPE was greatly improved, as confirmed from the significant enhancement of peak current and the negative shift of peak potentials. The optimum conditions for the analysis of molybdenum(VI) include 0.1 M sulfuric acid, 3.0 ×10<sup>-5</sup> M or 3.0 ×10<sup>-6</sup> M morin, an accumulation potential of -0.1 V (versus SCE), an accumulation period of 60 s or 120 s and a scan rate of 0.1 V s <sup>-1</sup>. Under the selected conditions, the linearity between peak currents and concentrations of molybdenum(VI) existed for a wide range of 8.0 ×10<sup>-10</sup>-6.0 ×10<sup>-8</sup> M (c<inf>morin</inf> = 3 ×10<sup>-6</sup> M) for 120 s accumulation and 6.0 ×10 <sup>-8</sup>-6.0 ×10<sup>-6</sup> M (c<inf>morin</inf> = 3 ×10<sup>-5</sup> M) for 60 s accumulation, a low detection limit (three times signal to noise) of 4.0 ×10<sup>-10</sup> M was obtained after a 120 s preconcentration. The proposed method was successfully applied to the determination of molybdenum(VI) in real samples with enhanced selectivity. ©2011 Elsevier B.V. All rights reserved.
语种：
英文
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Trace determination of molybdenum by anodic adsorptive stripping voltammetry using a multi-walled carbon nanotubes modified carbon paste electrode
作者：
Deng, Pei-Hong* ;Fei, Jun-Jie;Feng, Yong-Lan
期刊：
Sensors and Actuators B-Chemical ,2010年148(1):214-220 ISSN：0925-4005
通讯作者：
Deng, Pei-Hong
作者机构：
[Feng, Yong-Lan; Deng, Pei-Hong] Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.;[Fei, Jun-Jie] Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environmentally Friendly Chem & Applicat, Xiangtan 411105, Peoples R China.
通讯机构：
[Deng, Pei-Hong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Coll Hunan Prov, Key Lab Funct Organometall Mat, Hengyang 421008, Peoples R China.
关键词：
Alizarin violet;Anodic adsorptive stripping voltammetry;Modified electrode;Molybdenum;Multi-walled carbon nanotubes
摘要：
A method for the voltammetric determination of trace molybdenum using a multi-walled carbon nanotubes modified carbon paste electrode (MWCNT/CPE) was described. The new procedure is based on the adsorptive accumulation of the Mo(VI)–alizarin violet (AV) complex onto the surface of the modified electrode, followed by the electrochemical oxidation of adsorbed species. The modified electrode showed high electrocatalytic activity toward the oxidation of the free ligand and the complex and the peak current was enhanced significantly. The optimal experimental conditions include the use of 0.12 mol L−1 potassium biphthalate (KHP) buffer (pH 3.6), 4.0 × 10−6 mol L−1 AV (cMo(VI) ≤ 1.0 × 10−7 mol L−1)/4.0 × 10−5 mol L−1AV (cMo(VI) > 1.0 × 10−7 mol L−1), an accumulation potential of −0.30 V (versus SCE), an accumulation time of 120 s, a scan rate of 100 mV s−1 and a second-order derivative linear scan mode. The oxidation peak for the complex appears at 0.59 V. The peak current increases linearly with Mo(VI) concentration in the range of 4.0 × 10−10 mol L−1 to 1.0 × 10−7 mol L−1 and 2.0 × 10−7 mol L−1 to 8.0 × 10−6 mol L−1 and the detection limit (S/N = 3) is 1.0 × 10−10 mol L−1 (accumulation time 120 s). The proposed method was applied to the determination of Mo(VI) in natural water samples with satisfactory results.
语种：
英文
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Determination of trace vanadium(V) by adsorptive anodic stripping voltammetry on an acetylene black paste electrode in the presence of alizarin violet
作者：
Deng, Pei-hong* ;Fei, Jun-jie;Feng, Yong-lan
期刊：
Journal of Electroanalytical Chemistry ,2010年648(2):85-91 ISSN：1572-6657
通讯作者：
Deng, Pei-hong
作者机构：
[Feng, Yong-lan; Deng, Pei-hong] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat, Coll Hunan Prov, Hengyang 421008, Hunan, Peoples R China.;[Fei, Jun-jie] Xiangtan Univ, Key Lab Environmentally Friendly Chem & Applicat, Minist Educ, Coll Chem, Xiangtan 411105, Hunan, Peoples R China.
通讯机构：
[Deng, Pei-hong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat, Coll Hunan Prov, Hengyang 421008, Hunan, Peoples R China.
关键词：
Acetylene black paste electrode;Adsorptive anodic stripping voltammetry;Alizarin violet;Vanadium
摘要：
A sensitive and simplified voltammetric method is developed for the determination of trace amounts of vanadium(V) by adsorptive anodic stripping voltammetry using an acetylene black (AB) paste electrode. The method is based on the preconcentration of the V(V)-alizarin violet (AV) complex at open circuit while stirring the solution for 90 s in 0.15 mol dm<sup>-3</sup> hexamethylenetetraamine-hydrochloric acid buffer (pH 4.4), the adsorbed complex is then oxidized, producing a response with a peak potential of 564 mV when scanning linearly from 0 to 1000 mV. For voltammetric determination of V(V), the parameters influencing the peak current have been optimized. Under the selected conditions, the peak current and concentration of V(V) accorded with linear relationship in the range of 8.0 ×10<sup>-10</sup> mol dm <sup>-3</sup>-1.0 ×10<sup>-7</sup> mol dm<sup>-3</sup> (c<inf>AV</inf> = 2.0 ×10<sup>-6</sup> mol dm<sup>-3</sup>) and 1.0 ×10<sup>-7</sup> mol dm<sup>-3</sup>-8.0 ×10<sup>-6</sup> mol dm<sup>-3</sup> (c <inf>AV</inf> = 2.0 ×10<sup>-5</sup> mol dm<sup>-3</sup>), the detection limit (three times signal to noise) was estimated to be 6.0 ×10 <sup>-10</sup> mol dm<sup>-3</sup> for 90 s accumulation. The relative standard deviation (RSD) is 1.9% and 2.3% for V(V) concentrations of 1.0 ×10 <sup>-7</sup> mol dm<sup>-3</sup> and 1.0 ×10<sup>-8</sup> mol dm <sup>-3</sup> respectively. Finally, this proposed method was successfully applied to the determination of V(V) in natural water samples. ©2010 Elsevier B.V. All rights reserved.
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英文
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乙酰二茂铁修饰碳糊电极测定废水中对氨基苯酚
作者：
匡云飞;邹建陵;冯泳兰;邓培红;蔡志杰;...
期刊：
分析试验室 ,2010年29(3):47-49 ISSN：1000-0720
作者机构：
[匡云飞; 邹建陵; 冯泳兰; 邓培红; 蔡志杰; 李薇; 杨颖群; 屈景年; 刘梦琴] 衡阳师范学院化学与材料科学系
关键词：
乙酰二茂铁;修饰电极;伏安法;对氨基苯酚
摘要：
利用线性扫描溶出伏安法研究了对氨基苯酚(PAP)在乙酰二茂铁修饰碳糊电极电化学行为. 结果表明:在磷酸盐缓冲溶液(pH 3.2)中,该修饰电极对PAP具有较好的催化活性,其峰电流与PAP浓度在7.0×10~(-7)～3.0×10~(-5)mol/L范围内呈线性关系,检出限为1.0×10~(-7)mol/L (S/N=3). 利用该法测定了模拟水样中PAP的含量.
语种：
中文
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Co-piny-CMCPE对对苯二酚的电催化作用及测定
作者：
匡云飞;邹建陵;朱云芳;冯泳兰;彭运林;...
期刊：
化学试剂 ,2009年31(6):444-446 ISSN：0258-3283
作者机构：
[匡云飞; 邹建陵; 朱云芳; 冯泳兰; 彭运林; 莫运春; 邓培红] 衡阳师范学院化学与材料科学系
关键词：
修饰碳糊电极;联吡啶钴配合物;对苯二酚;电催化
摘要：
研制了一种新型的联吡啶钻配合物修饰碳糊电极(Co-piny-CMCPE),并利用循环伏安法研究了该修饰电极在pH 4.0的磷酸盐缓冲溶液中对对苯二酚(HQ)具有电催化作用,同时利用线性溶出伏安法测定了HQ的含量,线性范围为3.50×10~(-7)～7.50×10~(-5)mol/L,检出限为1.00 × 10~(-7)mol/L.该法的重现性和稳定性均较好,并成功用于模拟水样中的HQ含量的测定.
语种：
中文
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联吡啶钴配合物修饰碳糊电极测定邻苯二酚
作者：
匡云飞;邹建陵;邓培红;冯亚娟;杨颖群;...
期刊：
衡阳师范学院学报 ,2009年30(06):70-73 ISSN：1673-0313
作者机构：
衡阳师范学院,化学与材料科学系,湖南,衡阳,421008;[杨颖群; 匡云飞; 邹建陵; 冯亚娟; 邓培红; 屈景年; 莫运春] 衡阳师范学院
关键词：
联吡啶钴配合物修饰碳糊电极;循环伏安法;邻苯二酚;线性扫描溶出伏安法
摘要：
研制了一种新型的联吡啶钴配合物修饰碳糊电极(Co-piny/CMCPE),实验发现联吡啶钴配合物对邻苯二酚的还原具有较好电催化作用。测定的最佳条件为:以pH 6.4的磷酸盐缓冲溶液为底液,于1.100 V(vsSCE)处富集50 s,以0.300 V/s的扫描速度进行线性扫描,采用二阶导数线性扫描伏安法进行测定,其线性范围为2.0×10-9~4.00×10-5mol/L,检出限为1.00×10-9mol/L。该法的重现性和稳定性均较好。用于测定模拟水样中的邻苯二酚含量,平均回收率为98.1%,结果令人满意。
语种：
中文
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钪-钙-茜素红异多核络合物在碳纳米管修饰碳糊电极上的吸附伏安法研究
作者：
邓培红;费俊杰;张军;黎拒难
期刊：
冶金分析 ,2009年29(2):14-18 ISSN：1000-7571
通讯作者：
Deng, P.-H.
作者机构：
[邓培红; 张军] 衡阳师范学院,化学与材料科学系;[费俊杰; 黎拒难] 湘潭大学,化学学院
通讯机构：
Department of Chemistry and Material Science, Hengyang Normal University, China
关键词：
多壁碳纳米管;钪;化学修饰电极;吸附伏安法
摘要：
制备了多壁碳纳米管修饰碳糊电极并研究了钪-钙-茜素红异多核络合物在该电极上的吸附伏安行为,提出了采用二阶导数线性扫描伏安法测定痕量钪的新方法.在0.08 m01/L氨基乙酸-0.04 mol/L邻苯二甲酸氢钾缓冲溶液(pH3.6)中,在0 mV富集90 s后,从0～1 000 mV以200 mV/s的速率线性扫描,络合物吸附在修饰电极表面,于-544 mV(vs SCE)处产生-灵敏的溶出峰,为络合物中配体茜素红的还原所产生.二阶导数峰高与钪的浓度在6.0×10~(-12)～4.0×10~(-7)mol/L范围内分3段呈良好的线性关系,检出限(S/N=3)为4.0×10-~(12)mol/L(富集时间180 s).方法用于岩矿样品中痕量钪的测定,测定结果同ICP-AES法的测定结果相一致.
语种：
中文
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多壁碳纳米管修饰乙炔炭黑微电极溶出伏安法测定痕量锡
作者：
邓培红;费俊杰;张军;黎拒难
期刊：
冶金分析 ,2009年29(8):21-24 ISSN：1000-7571
通讯作者：
Deng, P.-H.
作者机构：
[邓培红; 张军] 衡阳师范学院化学与材料科学系;[费俊杰; 黎拒难] 湘潭大学化学学院
通讯机构：
Department of Chemistry and Material Science, Hengyang Normal University, China
关键词：
碳纳米管;化学修饰电极;阳极溶出伏安法;锡
摘要：
制备了多壁碳纳米管修饰乙炔炭黑微电极并研究了Sn(Ⅱ)在该电极上的阳极溶出伏安行为.实验发现,在1 mol/L HCl溶液中,Sn(Ⅱ)于-1 000 mV(vs.SCE)处被吸附还原,富集在该修饰电极表面.从-1 000 mV以100 mV/s的速率正向扫描至0 mV,锡在约-610 mV处出现一灵敏的阳极溶出峰,峰电流比未修饰电极增大约9倍.采用二阶导数线性扫描伏安法进行定量分析,峰电流与Sn(Ⅱ)的浓度在4.0×10~(-8)～1.0×10~(-5)mol/L范围内分二段呈良好的线性关系,检出限(S/N=3)为2.0×10~(-8)mol/L(富集时间90 s).方法用于生铁和合金钢样品中锡的测定,结果与电感耦合等离子体原子发射光谱法的结果一致.
语种：
中文
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多壁碳纳米管修饰乙炔炭黑电极测定碘
作者：
邓培红;费俊杰;匡云飞
期刊：
应用化学 ,2009年26(7):875-877 ISSN：1000-0518
作者机构：
[邓培红; 匡云飞] 衡阳师范学院化学与材料科学系;[费俊杰] 湘潭大学化学学院
关键词：
化学修饰电极;多壁碳纳米管;碘离子;伏安法
摘要：
以多壁碳纳米管修饰乙炔炭黑电极为工作电极,研究了碘离子在该修饰电极上的伏安分析特性,讨论了支持电解质种类、酸度等因素对碘离子氧化峰电流的影响,获得了最佳的实验条件. 在0.4 mol/L KH_2PO_4缓冲液(pH=4.0)中,从200 mV以200 mV/s的速率正向扫描至1 200 mV,碘离子在570 mV处出现一灵敏的氧化峰,峰电流比未修饰电极增大约3倍. 采用二阶导数线性扫描伏安法进行定量分析,峰电流与碘离子的浓度在2.0×10~(-6)～1.0×10~(-3) mol/L范围内呈良好的线性关系,检出限为8.0×10~(-7) mol/L. 方法用于食盐中碘含量的测定,相对标准偏差为1.2%～1.6%,回收率为97.4%～103%.
语种：
中文
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聚氨基乙酸修饰碳黑微电极同时测定多巴胺和抗坏血酸
作者：
邓培红;张军;黎拒难
期刊：
理化检验-化学分册 ,2009年45(1):7-10 ISSN：1001-4020
作者机构：
[邓培红; 张军] 衡阳师范学院化学与材料科学系;[黎拒难] 湘潭大学化学学院
关键词：
修饰碳黑微电极;聚氨基乙酸;多巴胺;抗坏血酸
摘要：
用电化学方法将氨基乙酸聚合在碳黑微电极表面制得聚氨基乙酸修饰碳黑微电极,并用循环伏安法在pH 7.0的磷酸盐缓冲介质中,研究了该修饰电极的电化学行为.结果表明:在此缓冲介质中,多巴胺和抗坏血酸经在-200 mV(vs.SCE)富集30 s后,在此修饰电极上发生催化氧化反应,并分别在320 mV及42 mV处呈现各自的峰电位(E_(pa)),在多巴胺和抗坏血酸的I″_p值及其浓度之间分别在2.0×10~(-8)～1.0×10~(-4)mol·L~(-1),4.0×10~(-7)～1.0×10~(-3)mol·L~(-1)范围呈线性关系,检出限(3σ)分别为6.0×10~(-9)mol·L~(-1)及1.0×10~(-7)mol·L~(-1).此修饰电极有良好的重复性和稳定性,只需将用过的电极在400 mV置于同一缓冲溶液中清洗0.5～2.0 min,即可方便地再生恢复原有性能.应用此方法分析了含有多巴胺及抗坏血酸的混合溶液,测定结果的相对标准偏差(n=7)在1.6 9,6～2.6%之间,回收率在96%～104%之间.
语种：
中文
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铜(Ⅱ)-茜素红S络合物在碳糊电极上吸附伏安法测定铜
作者：
邓培红;张军;黎拒难
期刊：
理化检验-化学分册 ,2009年45(8): 972-974,978 ISSN：1001-4020
作者机构：
衡阳师范学院,化学与材料科学系,衡阳,421008;湘潭大学,化学学院,湘潭,411105
关键词：
吸附伏安法;铜;茜素红S;碳糊电极
摘要：
基于铜(Ⅱ)-茜素红S络合物在碳糊电极上的还原波,提出了吸附伏安法测定痕量铜的方法.在极谱分析仪上采用二次导数线性扫描伏安法进行分析,在含有1.0×10~(-5)mol·L~(-1)茜素红S的pH 4.0的乙酸-乙酸钠缓冲介质中,当富集电位为0 mV,富集时间为180 s,扫描速率为100 mV·s~(-1)时,铜(Ⅱ)-茜素红S络合物吸附在碳糊电极表面,于-316 mV(vs.SCE)处产生一灵敏的还原峰,络合物的峰电流与铜(Ⅱ)的浓度在1.0×10~(-9)～2.0×10~(-7)mol·L~(-1)范围内呈线性关系,检出限(3S/N)为6.0×10~(10)mol·L~(-1).方法用于锌合金中铜的测定,测定值的相对标准偏差(n=7)均小于3.5%.用标准加入法进行了回收试验,测得回收率在96.0%～102.0%之间.
语种：
中文
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Trace determination of vanadium(V) using anodic adsorptive voltammetry at a glassy carbon electrode modified with multi-walled carbon nanotubes
作者：
Deng, Pei-Hong* ;Fei, Jun-Jie;Zhang, Jun;Li, Ju-Nan
期刊：
Microchimica Acta ,2009年165(1-2):211-216 ISSN：0026-3672
通讯作者：
Deng, Pei-Hong
作者机构：
[Deng, Pei-Hong; Zhang, Jun] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang, Peoples R China.;[Fei, Jun-Jie; Li, Ju-Nan] Xiangtan Univ, Coll Chem, Xiangtan, Peoples R China.
通讯机构：
[Deng, Pei-Hong] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang, Peoples R China.
关键词：
Multi-walled carbon nanotubes;Modified electrode;Anodic adsorptive voltammetry;Vanadium
摘要：
A glassy carbon electrode modified with multi-walled carbon nanotubes (MWCNT) was prepared and the determination of trace amount of vanadium(V) based on the anodic adsorptive voltammetry of the vanadium-alizarin red S (ARS) complex is described for the first time. The results show that the sensitivity and the selectivity of the method are excellent. The second derivative linear scan voltammograms of the complex were recorded using a polarographic analyzer in the range from 0 to 1,000 mV (vs. SCE). It was found that the complex can be adsorbed on the surface of the electrode, yielding a peak at about 706 mV, corresponding to the oxidation of ARS in the complex. The peak current increases linearly with the V(V) concentration in the range of 6.0 nM to similar to 1.0 mu M (4.0 mu M ARS), 2.0 mu M similar to 10 mu M (40 mu M ARS) and the detection limit (at S/N = 3) was 2.0 nM (accumulation time 120 s). The method was successfully applied to the determination of trace amounts of vanadium in water samples.
语种：
英文
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多壁碳纳米管修饰碳黑微电极同时测定多巴胺和抗坏血酸
作者：
邓培红;张军;黎拒难
期刊：
分析试验室 ,2009年28(1):92-95 ISSN：1000-0720
作者机构：
[邓培红; 张军] 衡阳师范学院化学与材料科学系;[黎拒难] 湘潭大学化学学院
关键词：
碳纳米管;修饰电极;多巴胺;抗坏血酸;伏安法
摘要：
制备了多壁碳纳米管修饰碳黑微电极,研究了多巴胺(DA)和抗坏血酸(AA)在该修饰电极上的电化学行为。实验表明,在pH 7.0的PBS缓冲溶液中,该修饰电极对DA和AA均具有显著的催化氧化作用,AA与DA的氧化电位分别为30 mV和280 mV(vs.SCE)。利用二次导数线性扫描伏安法测定,DA与AA的线性范围分别为6.0×10~(-9)2.0×10~(-4)mol/L和2.0×10~(-7)1.0×10~(-3) mol/L,检出限为2.0×10~(-9)mol/L和1.0×10~(-7)mol/L。方法已用于人工合成样品的分析。
语种：
中文
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茜素红S/多壁碳纳米管修饰碳糊电极阳极溶出伏安法测定痕量铜
作者：
邓培红;张军;黎拒难
期刊：
分析试验室 ,2009年28(02):86-90 ISSN：1000-0720
作者机构：
衡阳师范学院化学与材料科学系,衡阳,421008;湘潭大学化学学院,湘潭,411105;[邓培红; 张军] 衡阳师范学院;[黎拒难] 湘潭大学
关键词：
多壁碳纳米管;茜素红S;铜;化学修饰电极;阳极溶出伏安法
摘要：
制备了茜素红S/多壁碳纳米管修饰碳糊电极,提出了一种灵敏的溶出伏安法测定痕量铜的新方法。在极谱分析仪上采用二阶导数线性扫描伏安法进行分析,在0.1moL/L的HAc-NaAc缓冲溶液(pH4.1)中,Cu与修饰电极表面的茜素红S(ARS)形成Cu(Ⅱ)-ARS络合物而富集于电极表面,于-400mV处还原后,再进行阳极化扫描,于64mV处获得一灵敏的铜的阳极溶出峰,峰电流与Cu(Ⅱ)浓度在2×10-11mol/L～6×10-7mol/L范围内呈良好的线性关系,检出限(S/N=3)为8.0×10-12mol/L(富集时间240s)。方法应用于人发中铜含量的测定,回收率为98%～102%。
语种：
中文
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