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| 1 | 方波伏安法测定新型修饰多壁碳纳米管糊电极对肼的电催化氧化(英文)显示文摘The application of p-aminophenol as a suitable mediator, as a sensitive and selective voltammetric sensor for the determination of hydrazine using square wave voltammetric method were described. The modified multiwall carbon nanotubes paste electrode exhibited a good electrocatalytic activity for the oxidation of hydrazine at pH = 7.0. The catalytic oxidation peak currents showed a linear dependence of the peaks current to the hydrazine concentrations in the range of 0.5–175 μmol/L with a correlation coefficient of 0.9975. The detection limit (S/N = 3) was estimated to be 0.3 μmol/L of hydrazine. The relative standard deviations for 0.7 and 5.0 μmol/L hydrazine were 1.7 and 1.1%, respectively. The modified electrode showed good sensitivity and selectivity. The diffusion coefficient (D = 9.5 × 10–4 cm2/s) and the kinetic parameters such as the electron transfer coefficient (α = 0.7) of hydrazine at the surface of the modified electrode were determined using electrochemical approaches. The electrode was successfully applied for the determination of hydrazine in real samples with satisfactory results. | Ali A. ENSAFI Mahsa LOTFI Hassan KARIMI-MALEH | 2012 | 催化学报2012，33，3： | 6 |
| 2 | 用对氨基苯酚改性的碳纳米管糊电极同时测定羟胺和苯酚(英文)显示文摘A carbon paste electrode that was chemically modified with multiwall carbon nanotubes and p-aminophenol was used as a selective electrochemical sensor for the simultaneous detection of hydroxylamine (HX) and phenol. Cyclic voltammetry, double potential-step chronoamperometry, square wave voltammetry (SWV), and electrochemical impedance spectroscopy were used to investigate the use of p-aminophenol in the carbon nanotubes paste matrixes as a mediator for the electrocatalytic oxidation of HX and phenol in aqueous solution. The coefficient of electron transfer and catalytic reaction rate constant were determined using the electrochemical methods. Under optimized conditions, the electrocatalytic oxidation current peaks for HX and phenol increased linearly with concentration in the range of 0.5-180.0 and 10.0-650.0 μmol/L for HX and phenol, respectively. The detection limits for HX and phenol were 0.15 and 7.1 μmol/L, respectively. The anodic potential peaks of HX and phenol were separated by 0.65 V in SWV. Because of good selectivity and sensitivity, the present method provides a simple method for the selective detection of HX and phenol in practical samples such as water samples. | Ali A. Ensafi E. Heydari-Bafrooei B. Rezaei | 2013 | 催化学报2013，34，9： | 3 |
| 3 | Sequential flow injection spectrophotometric determination of nitrite and nitrate in various samples显示文摘 | A Kazemzadeh Ali A Ensafi | 2001 | Analytica Chimica Acta2001，，2： | 2 |
| 4 | A new sensor for electrochemical determination of captopril using chlorpromazine as a mediator at a glassy carbon electrode显示文摘 | Ali Ensafi A. Arabzadeh | 2012 | Journal of Analytical Chemistry2012，，5： | 2 |
| 5 | Kinetic-Spectrophotometric Determination of Ascorbic Acid by Inhibition of the Hydrochloric Acid Bromate Reaction 显示文摘 | Ensafi A A Rezaei B Movahedinia H | 2002 | Spectrochim Acta Part A2002，58，： | 1 |
| 6 | 显示文摘 | ENSAFI A A ABBASI S REZAEI B | 2001 | Spectrochimica Acta Part A2001，57，： | 1 |
| 7 | p-Aminophenol-multiwall carbon nanotubes TiO2 electrode as a sensor for simultaneous determination of penicillamine and uric acid显示文摘 | ENSAFI A A KHODDAMI E REZAEI B | | 0，，1： | 1 |
| 8 | Efficient and selective extraction of iodine through a liquid membrane显示文摘 | ENSAFI A A ESKANDARI H | 2001 | Microchemical Journal2001，69，1： | 1 |
| 9 | Flow injection simultaneous determination iodate and periodate by spectrophotometric and spectroflurimetric detection显示文摘 | ENSAFI A A DEHAGHI G B | 2000 | Anal Sci2000，16，1： | 1 |
| 10 | On-line separation and precon- centration of lead(II) by solid-phase extraction using acti- vated carbon loaded with xylenol orange and its determina- tion by flame atomic absorption spectrometry显示文摘 | Ensafi A A Shiraz A Z | 2008 | J Hazard Mater2008，150，3： | 1 |
| 11 | Development ofa Mercury Optical Sensor Based on Immobilization of 4-(2-Pyridylazo)-Resorcinol on a Triacetylcellulose Membrane显示文摘 | Ensafi A A Fouladgar M | 2006 | Senors and Actuators B2006，113，1： | 1 |
| 12 | A novel sensitive DNA–biosensor for detection of a carcinogen, Sudan II, using electrochemically treated pencil graphite electrode by voltammetric methods显示文摘 | Ali A. Ensafi Behzad Rezaei Maryam Amini Esmaeil Heydari-Bafrooei | 2011 | Talanta2011，，： | 1 |
| 13 | Solubility Prediction of 21 Azo Dyes in Supercritical Carbon Dioxide Using Wavelet Neural Network显示文摘 | Tabaraki R Khayamian T Ensafi A A | 2007 | Dyes and Pigments2007，73，2： | 1 |
| 14 | Spectrophoto- metric reaction rate method for the determination of trace amounts of vanadium( V ) by its catalytic effect on the oxidation of Nile Blue with bromate 显示文摘 | Ensafi A A Amini M K Mazloum M | 1999 | Analytical Letters1999，32，9： | 1 |
| 15 | 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 |
| 16 | Determination of ultratrace amounts of ruthenium by differential pulse voltammetry using factorial design for optimiza- tion显示文摘 | Ensafi A A Zarei K Khayamian T | 1999 | Microchemical Journal1999，6，2： | 1 |
| 17 | Monitoring nitrite with optical sensing tilms显示文摘 | ENSAFI A A KAXEMZADEH A | 2002 | Microchemical Journal2002，72，2： | 1 |
| 18 | Electrocatalytic determination of sulfite using a modified carbon nanotubes paste electrode: application for determination of sulfite in real samples显示文摘 | Hassan Karimi-Maleh Ali Ensafi Hadi Beitollahi Vahid Nasiri Mohammad Khalilzadeh Pourya Biparva | 2012 | Ionics2012，，7： | 1 |
| 19 | Simultaneous kinetic determination of thiocyanate and sulfide using eigenvalue ranking and correlation ranking in principal component-wavelet neural network 显示文摘 | ENSAFI A A KHAYAMIAN T TABARAKI R | 2007 | Talanta2007，71，： | 1 |
| 20 | Simultaneous determination of nitrite and nitrate in various samples using flow injection with spectrophotometric detection显示文摘 | ENSAFI A A KAZEMZADEH A | 1999 | Anal Chim Acta1999，382，： | 1 |
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