Analytical and Bioanalytical Chemistry Research

Polythiophene (PT) coated magnetic multi-walled carbon nanotubes (MMWCNTs) as a magnetic sorbent was synthesized and characterized by FT-IR, SEM, XRD, and VSM. The sorbent was applied for simultaneous solid-phase microextraction of trace amounts of lead and cadmium ions from various matrices. The retained analytes were eluted using nitric acid solution (0.5 mol L-1) and quantified by flame atomic absorption spectrometry. The main factors affecting the extraction of lead and cadmium such as pH, type and concentration of eluent, amount of the sorbent, ionic strength and sample volume were investigated and optimized. Under the optimized conditions, the detection limits (based on 3Sb/m) of 0.54 and 0.03 µg L-1 and the enhancement factors of 197.6 and 195.5 were obtained for lead and cadmium, respectively. The relative standard deviations of 1.5% (n = 6) at 50.0 µg L-1 of lead and 2.1% at 5.0 µg L-1 of cadmium were achieved. The method was found to be effective, selective, rapid, and simple for the determination of trace amounts of lead and cadmium and was successfully applied to the determination of lead and cadmium in water, black tea, rice, and milk samples without evident interference from the complex matrix. Furthermore, the sorbent showed high capacity, and the precision and accuracy of the method were satisfactory. The validity of the method was examined through the recovery experiments and independent analysis by electrothermal atomic absorption spectrometry.

Zahra Dehghani

Shayessteh Dadfarnia

Ali Mohammad Haji Shabani

Mohammad Hasan Ehrampoush

Analytical and bioanalytical chemistry research

Magnetic Multi-Walled Carbon Nanotubes Modified with Polythiophene as a Sorbent for Simultaneous Solid Phase Microextraction of Lead and Cadmium from Water and Food Samples

磁性多壁碳纳米管修饰聚噻吩作为吸附剂用于水和食品样品中铅和镉的同时固相微萃取

Poly (threonine) modified carbon paste electrode (PTMCPE) can be used as a responsive and selective electrocatalytic sensor for the estimation of riboflavin (RF) by means of cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The proposed electrode creates a catalytic enhancement in redox behavior of RF when equated with bare carbon paste electrode (BCPE). Under optimized conditions, RF quantification at modified electrode has shown a detection limit of 1.78×10-7 M in the linear range of 0.2-1 µM and 1-5 µM. Simultaneous analysis of RF with folic acid (FA) and ascorbic acid (AA) shows well-separated peaks leading to a quick and selective analysis of RF. The fabricated sensor can be successfully applied to RF analysis in human blood serum and B- complex tablet with acceptable results. Simultaneous analysis of RF with folic acid (FA) and ascorbic acid (AA) shows well-separated peaks leading to a quick and selective analysis of RF. The fabricated sensor can be successfully applied to RF analysis in human blood serum and B- complex tablet with acceptable results.

Edwin S D’ Souza

J.G. Manjunatha

C. Raril

Girish Tigari

P. A. Pushpanjali

Polymer Modified Carbon Paste Electrode as a Sensitive Sensor for the Electrochemical Determination of Riboflavin and Its Application in Pharmaceutical and Biological Samples

聚合物改性碳糊电极作为灵敏传感器用于核黄素的电化学测定及其在药物和生物样品中的应用

As a promising alternative for the mercury film electrode (MFE), the bismuth film electrode (BiFE) has been widely used in the field of electrochemical analysis. BiFE shows attractive properties and excellent performance such as environmentally friendliness, high sensitivity, easy preparation, well-defined signals and negligible effect to dissolved oxygen. According to recent experimental reports many electrochemical analysis have been studied with the use of BiFEs. Toxic heavy metal ions, pharmaceutical substances, pesticides and other biological molecules and products are determined with the BiFE. The voltammetric behavior of tannic acid (TA) at bismuth film modified glassy carbon electrode (Bi-GCE) has been studied by linear sweep voltammetry (LSV). Bismuth film was deposited on glassy carbon electrode (GCE) by single potential step chronoamperometric deposition at -450 mV for 120 s. TA shows a well-defined cathodic peak on the modified electrode at around -0.6 V vs. Ag/AgCl in Briton Robinson (BR) buffer solution of pH 3.6 at Bi-GCE. The effect of deposition time, deposition potential, bath concentration and pH of supporting electrolyte on the reduction current of TA were optimized. Under optimum conditions TA shows a linear range between 0.05 μM to 200 μM and the limit of detection (LoD) was found to be 0.035 μΜ. The developed method was used for determination of TA in tea samples.

Melaku Ademe

Shimeles Addisu Kitte

Getu Sisay

Abebe Diro

Bismuth Film Modified Glassy Carbon Electrode for Determination of Tannic Acid

用于测定鞣酸的铋膜修饰玻碳电极

In this work, the electrochemistry of the ethanolic leaf extract of Melissa officinalis L., as an herbal medicine, was studied. The antioxidant activity of the plant was evaluated using the cyclic voltammetry technique. The results showed that this extract is oxidized at low potentials compared to quercetin, salicylic acid and gallic acid as standard synthetic antioxidants. It was also concluded that the increase in the antioxidant activity causes a decrease in Ep A and an increase in the number of hydroxyl groups on the aromatic ring. The DPPH assay (free radical scavenging activity) was applied in order to estimate the antioxidant activity. The antioxidant activity of rosmarinic acid (as the main natural compound in this herb) against Cytochrome P450 3A4 (4D75), Myeloperoxidase (1DNW), and Thyosine (PBD ID: 3nm8) (reactive oxygen species (ROS) generating enzymes) was investigated through molecular docking studies. The interaction of rosmarinic acid with Thyosine exhibited the most inhibitory effect with -10.5 kJ mol-1 binding affinity value. The results indicated that the rosmarinic acid is bound exclusively to the binding sites of the ROS generating enzymes and has a significant role in counteracting the destructive effects of oxidative stress in the biological system. Finally, the electrochemical oxidation of the ethanolic leaf extract of Melissa officinalis L., has been studied in the presence of captopril by cyclic voltammetry method in the biological pH range. The results showed that the electrochemically generated compounds from this herb can participate in the chemical reaction with captopril and reduce the concentration of the active form of this drug.

Ameneh Amania

Mahtab Salehib

Mahdi Jamshidi

Electrochemical Oxidation, Biological Evaluation, and Bioinformatics Approach for the Ethanolic Leaf Extract of Melissa officinalis L.

香蜂草叶乙醇提取物的电化学氧化、生物学评价及生物信息学方法

A simple solid phase extraction (SPE) based on sodium dodecyl sulfate grafted chitosan nanocomposite was applied for simultaneous spectrophotometric determination of crystal violet (CV) and malachite green (MG) content of water samples. For the data analysis of the overlapped spectra of the two dyes, the partial least square regression (PLSR) has been utilized. The synthesized sorbent was characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The results showed the SDS was successfully cross-linked with the chitosan. Various parameters affecting the simultaneous extraction of the analytes, such as pH of sample solution, sample flow rate and the volume and flow rate of eluent were optimized by central composite design and response surface methodology (RSM). Figures of merits consisting of sensitivity, analytical sensitivity, limits of detection (LOD) and limit of quantitation (LOQ) were calculated to 0.89 ng ml -1 , 762.07, 0.06 ng ml -1 and 0.20 ng ml -1 for CV, and 0.15 ng ml -1 , 128.24, 0.17 ng ml -1 and 0.53 ng ml -1 for MG. The calibration curve showed high correlation coefficients of 0.9995 and 0.9993 for CV and MG, respectively. Moreovere, preconcentration factor and extraction recovery of the analytes were computed based on the regression coeffients of PLSR acting as a multivariate net analyte signal filter.

Farideh Bataghvaa

S. Maryam Sajjadia

Bahram Daraei

Simultaneous Spectrophotometric Quantification of Crystal Violet and Malachite Green in Aqueous Samples: Combination of Multivariate Calibration Method and Solid Phase Extraction Based on Sodium Dodecyl Sulfate (SDS) Grafted Chitosan Nano-composite

水溶液中结晶紫和孔雀石绿的同时分光光度定量分析：基于十二烷基硫酸钠（SDS）接枝壳聚糖纳米复合物的多元校准方法与固相萃取结合

The main objective of this work was to evaluate the feasibility of the application of GO/Na2SiO3 nanocomposite as highly efficient adsorbent for the removal of malachite green as a cationic dye from aqueous solutions. To do so, first the synthesized nanosorbent was characterized via FTIR, SEM, TEM and XRD techniques. Surface area and pore mean size of above mentioned nanocomposite were determined using BET technique. Also, some important parameters affecting the efficiency of the absorption of malachite green, such as pH, adsorbent dosage, contact time, primary concentration of dye and salt effect were optimized. The malachite green (water-soluble) dye was analyzed at a maximum wavelength of 618 nm. The optimal conditions for removal of malachite green from aqueous solution included a 20 mg l-1 initial concentration with 25 mg adsorbent at pH 7, and adsorption equilibrium was achieved within 5 min. Kinetic studies confirmed that dye adsorption process followed pseudo-second order kinetic models (R2 = 0.9999) and adsorption equilibrium data showed good correlation with Freundlich isotherm (R2=0.9982 at 298 K). Thermodynamic analysis indicates that the adsorption process is spontaneous and exothermic in nature. In addition, the experimental data obtained from reusability studies showed that the prepared adsorbent could be used in up to six adsorption-desorption cycles without significant decrease in removal efficiency.

Ali Hassanzadeh

Ebrahim Ghorbani Kalhor

Khalil Farhadi

Jafar Abolhasani

Feasibility Study of Using graphene Oxide/silica Gel Nanocomposite Prepared by Sol-gel Method for Removing Malachite Green from Aqueous Solutions: Optimization, Kinetic, and Isotherm Studies

氧化石墨烯/硅胶纳米复合材料用于去除水溶液中孔雀石绿的可行性研究：优化、动力学和等温线研究

This study used a hydrothermal method to synthesize MoS2 nanosheets (NSs). The study also utilized various analytical procedures to characterize the MoS2 NSs. It has been found that XRD, in particular, gave information on the crystal structure of the MoS2 NSs. These NSs have been visible with SEM. In addition, EDX has been used to scrutinize MoS2 NSs formation. Moreover, MoS2 NSs modified graphite screen printed electrode (MoS2 NSS/GSPE) has been built by dropping the MoS2 NSS onto GSPE for making a voltammetric sensor as well as the evaluation of the morphine voltammetric behavior. Findings showed stronger electro-catalytic oxidation of MoS2 NSS for morphine with a more negative potential. Consequently, the modified electrode enabled the simultaneous detection of diclofenac and morphine with the peak potential at 0.47 V and 0.27 V. Results indicated linear response in a concentration range between 0.05 and 600.0 μM (morphine) with 0.03 μM limit of detection (LOD). Finally, the modified electrode has been substantially utilized for analyzing diclofenac and morphine in the samples of diclophenac tablet, urine, and morphine ampoule with acceptable recovery and accuracy.

Mohammad Reza Baezzat

Nahid Tavakkoli

Hassan Zamani

Construction of a New Electrochemical Sensor Based on MoS2 Nanosheets Modified Graphite Screen Printed Electrode for Simultaneous Determination of Diclofenac and Morphine

基于MoS2纳米片修饰石墨丝网印刷电极的新型电化学传感器的构建及其对双氯芬酸和吗啡的同时测定

A cloud point extraction/solvation method (CPE-SM) based on the use of vitamin C as a chelating agent was developed for the separation and determination of silver in environmental samples. TritonX-100 was used to extract silver ions in aqueous solutions after forming solvation species with vitamin C in the presence of salting-out (0.5 mol L-1 KNO3) at 90 C for 10 minutes. This study evaluated the main parameters affecting the CPE-SM method, such as the kind and concentration of the salting-out, organic reagents, silver ion, temperature, heating time, and volume of surfactant. Under the optimized experimental factors, the calibration curve was linear in the range (0.1 -10 μg/L). The relative standard deviation (RSD) was 1.1-2.9% for n:5 at 1,4,9 μg L-1, a low limit of detection (LOD), and a limit of quantification (LOQ) of 0.035, 0.116 μg L-1 respectively. The accuracy of the method was evaluated by two independent techniques (flame atomic absorption spectrometry – FAAS, and spectrophotometry - using dithizone as a complexing agent). The CPE-SM technique was used to preconcentrate and determine the silver ions in river water, tap water, and soil samples, and the results were favorable and good.

Ebaa Adnan Azooz

Fatimah Abd Wannas

Rana Kadhim Ridha

Shawket Kadhim Jawad

Emad Abbas Jaffar Al-Mulla

A Green Approach for Micro Determination of Silver(I) in Water and Soil Samples Using Vitamin C

一种利用维生素C进行水和土壤样品中银(I)微测定的绿色方法

In this study, new chemiluminescence (CL) method was proposed to determine the amount of remifentanil in pharmaceuticals. We found that the weak CL intensity in the reaction between acidic cerium(IV) and Ru(phen)32+ complex increases significantly in the presence of remifentanil. Effect of remifentanil was investigated in some other CL systems such as luminol-IO4-, direct oxidation using acidic cerium(IV) or acidic KMnO4. Moreover, the effect of different dyes as a sensitizer was investigated in the KMnO4-Dye CL system. The dyes used in this study were crystal violet, amido black, naphthol green, amaranth, rhodamine 6G, safranin, orange G, fluorescein, and chromotrope 2R. The results showed that remifentanil has the highest CL intensity and S/B ratio in the acidic cerium(IV)- Ru(phen)32+ CL system. The reaction mechanism was evaluated by studying the CL reaction kinetics in the presence and absence of remifentanil and spectrophotometric spectra. The results indicate that remifentanil can convert Ru(phen)33+ complex rapidly to Ru(phen)32+* complex, which emits light when it returns to its ground-state. The method's linear dynamic range, detection limit, and reproducibility for four repetitive measurements of 109.39 μg mL-1 were 1.75-145.85, 1.41 μg mL-1, and 2.3%, respectively. The method proposed in this study was used to determine the content of remifentanil in pharmaceutical preparations.

Mobina Meskari

Ali Mokhtari

Determination of Remifentanil in Pharmaceuticals Using Chemiluminescence System of Ru(phen)32+-Ce(IV)

使用Ru(phen)32+-Ce(IV)化学发光系统测定药物中的瑞芬太尼

In this article, polycaprolactone (PCL) polymer nanofibers has been used in the presence of curcumin (Cur) to control the corrosion rate of temporary magnesium (alloy AZ31) implants. PCL, PCL-Cur, and sodium alginate (SA)-polyvinyl alcohol (PVA)/PCL-Cur polymer coating were produced. The mentioned nanofibers were produced using a simple and cost-effective electrospinning technique. We used different techniques to examine the properties of the produced fibers, and it was demonstrated that the hydrophobic produced nanofibers with contact angle of 135.2 degrees have continuous strands and a diameter of 171.57 nm. The presence of Cur inside PCL nanofiber not only did not have any effect on the PCL nanofiber morphology, but also it increased adhesion of the coating, and 74.59% of Cur was released after 7 days. To investigate the effects of different polymeric coatings on the surface of Mg metal in the simulated body fluid (SBF), SEM, weight measurement tests, pH measurement, Polarization, and Electrochemical Impedance Spectroscopy (EIS) has been used. During the study period there was no degradation in any part of the PCL-Cur hydrophobic polymer coating. For this coating, the percentage of weight loss, pH value, corrosion potential (Ecorr) and corrosion rate (CR) were 0.19%, 8.39, -1.388 V and 0.198 mm/y, respectively, where these values indicate the significant decrease of corrosion rate while using PCL-Cur coating.

Saba Dabirian

Soheila Kashanian

Maryam Nazari

Elham Arkan

The Corrosion Control of Temporary Magnesium (AZ31 alloy) Implants Using Electrospinning Polycaprolactone-curcumin Nanofiber Coatings

电纺聚己内酯-姜黄素纳米纤维涂层对临时镁（AZ31合金）植入物的腐蚀控制

Abbreviation
Journal Impact	1.00
Quartiles(Global)	CHEMISTRY, ANALYTICAL(Q4)

ISSN	2383-093X
h-index	15

Publication Information	Publisher: Iranian Chemical Society，Publishing cycle: ，Journal Type: journal，Open Access Journals: Yes
Basic data	Year of publication: 2014，Proportion of original research papers: 100.00%，Self Citation Rate:9.10%， Gold OA Rate: 0.00%
Average review cycle	网友分享经验：18 Weeks

Analytical and Bioanalytical Chemistry Research

Journal Citation Format

A journal article with 1 author

A journal article with 2 authors

A journal article with 3 authors

A journal article with 5 or more authors

Books Citation Format

Thesis Citation Format

Web sites Citation Format

Patent Citation Format

Staying up late manually editing references? ivySCI automatically matches journals and helps you generate references with a single click.

Share Submission Experience