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| 1 | Voltammetric determination of cysteamine at multiwalled carbon nanotubes paste electrode in the presence of isoproterenol as a mediator显示文摘A sensitive electrochemical sensor for the determination of cysteamine(CA) was developed using a modified multiwall carbon nanotube paste electrode(MWCNTPE) with isoproterenol(ISPT) as a mediator.This modified electrode showed very high electrocatalytic activity for the anodic oxidation of CA.Under the optimized conditions,the electrocatalytic peak current showed a linear relationship with CA concentration in the range of 0.3–450.0 mmol/L with a detection limit of 0.09 mmol/L CA.The modified electrode was used for the determination of CA in real samples such as urine and drug samples. | Mohsen Keyvanfard Maryam Ahmadi Fatemeh Karimi Khadijeh Alizad | 2014 | Chinese Chemical Letters2014，25，9： | 4 |
| 2 | 以3,4-二羟基肉桂酸为介质的多壁碳纳米管糊电极用于检测药物和尿液样品中的谷胱甘肽(英文)显示文摘A sensitive and selective electrochemical sensor for the determination of glutathione(GSH) was developed using a modified multiwall carbon nanotube paste electrode with 3,4 dihydroxy cinnamic acid as a mediator.This modified electrode showed very high electrocatalytic activity for the anodic oxidation of GSH.Under the optimized conditions,the electrocatalytic peak current showed a linear relationship with GSH concentration in the range of 0.5-400.0 μmol/L with a detection limit of 0.1 μmol/L GSH.The relative standard deviations for seven successive assays of 5.0 and 25.0 μmol/L GSH were 2.2% and 2.7%,respectively.The modified electrode was used for the determination of GSH compounds in real urine samples. | Mohsen Keyvanfard Hassan Karimi-Maleh Khadijeh Alizad | 2013 | 催化学报2013，34，10： | 3 |
| 3 | 在3,4-二羟基肉桂酸介质中以多壁碳纳米管为传感器电催化检测L-半胱氨酸(英文)显示文摘A highly sensitive electrochemical sensor was prepared for the determination of L-cysteine using a modified multiwall carbon nanotubes paste electrode in the presence of 3,4-dihydroxycinnamic acid(3,4-DHCA) as a mediator, based on an electrocatalytic process. The results indicate that the electrode is electrocatalytically efficient for the oxidation of L-cysteine in the presence of 3,4-DHCA. The interaction between the mediator and L-cysteine can be used for its sensitive and selective determination. Using chronoamperometry, the catalytic reaction rate constant was calculated to be 2.37 × 102 mol–1 L s–1. The catalytic peak current was linearly dependent on the L-cysteine concentration in the range of 0.4–115 μmol/L. The detection limit obtained by linear sweep voltammetry was 0.25 μmol/L. Finally, the modified electrode was examined as a selective, simple, and precise new electrochemical sensor for the determination of L-cysteine in real samples. | Mohsen Keyvanfard Rasoul Salmani-mobarakeh Hassan Karimi-Maleh Khadijeh Alizad | 2014 | 催化学报2014，35，7： | 3 |
| 4 | A new voltammetric sensor for the determination of sulfite in water and wastewater using modified-multiwall carbon nanotubes paste electrode显示文摘 | AliA. Ensafi Hassan Karimi-Maleh M. Keyvanfard | 2013 | International Journal of Environmental Analytical Chemistry2013，，6： | 1 |
| 5 | A simple and selective spectrophotometric flow injection determination ot trace amounts of ruthenium by catalytic oxidation of safranin-O 显示文摘 | Rezaei B Keyvanfard M | 2008 | Journal of Hazardous Material2008，151，2： | 1 |
| 6 | Inhibition kinetic determination of trace amounts of ruthenium (III) by the spectrophotometric method with rhodamine B in micellar medium 显示文摘 | Keyvanfard M | 2008 | Proceedings of World Academy of Scince Engineering and Technology2008，33，11： | 1 |
| 7 | Kinetic spectrophotometric method for the determination of selenium(Ⅳ) by its catalytic effect on the reduction of spadns by sulphide in micellar media 显示文摘 | Keyvanfard M Sharifian A | 2006 | Journal of Analytical Chemistry2006，61，6： | 1 |
| 8 | Kinetic Spectrophotomettic Method for the Determination of Rhodium by Its Catalytic Effect on the Oxidation of O-Toluidine Blue by Periodate in Micellar Media显示文摘 | Ensafi A A Keyvanfard M | 2003 | Journal of Analytical Chemistry2003，58，11： | 1 |
| 9 | Catalytic-kinetic determination of palladium (Ⅱ) by spectrophotometric method in anionic micellar medium显示文摘 | Ensafi A A Keyvanfard M | 2002 | Anal Lett2002，35，2： | 1 |
| 10 | 邻苯三酚红多壁碳纳米管糊电极为传感器分析制药和生物样品中异丙基肾上腺素(英文)显示文摘异丙基肾上腺素(ISPR)是一种重要的邻苯二酚胺类药物,广泛用于治疗心脏疾病.然而,过量服用该药对人体非常危险.本文采用邻苯三酚红修饰多壁碳纳米管糊电极(PGRMMWCNTPE)制备了一种新型传感器,用于高灵敏度检测水溶液中的ISPR.采用计时电流法、循环伏安法和方波伏安法考察了PGRMMWCNTPE电极电催化氧化ISPR性能.通过伏安数据计算了ISPR氧化的催化反应速率常数、电子传递系数和扩散系数.在ISPR浓度0.8–570μmol/L范围内建立了线性标准曲线,检测限为0.47μmol/L ISPR.将该传感器用于尿液和药物样品中ISPR检测得到满意结果. | Mohsen Keyvanfard Khadijeh Alizad | 2016 | Chinese Journal of Catalysis2016，37，4： | 0 |
| 11 | 在色氨酸存在下利用多壁碳纳米管糊电极和萘酚介质构成的伏安传感器测定N-乙酰半胱氨酸(英文)显示文摘A multiwall carbon nanotube modified electrode prepared by incorporating multiwall carbon nanotubes in the electrode of a sensor and naphthol green as a homogeneous mediator was used as a voltammetric sensor for the determination of N‐actylcysteine(N‐AC) in the presence of trypto-phan(Trp). The voltammograms of differential pulse voltammetry of N‐AC in a mixture with Trp were separated from each other by a potential difference of 200 mV, which allowed the determina-tion of both N‐AC and Trp simultaneously. Under the optimum conditions, the electrocatalytic cur-rents increased linearly with N‐AC concentration in the range of 0.25–400 μmol/L(two linear seg-ments with different slopes). The detection limit for N‐AC was 0.08 μmol/L. The kinetic parameters of the system were determined using electrochemical methods. The method was applied for the determination of N‐AC in drug and urine samples. | Mohsen Keyvanfard Maryam Tahmasbi Hassan Karimi-Maleh Khadijeh Alizad | 2014 | 催化学报2014，35，4： | 0 |
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