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The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO2 and Pt–Loaded TiO2 部分操作参数对TiO2和pt负载TiO2水悬浮液中苯胺和苯胺光降解动力学的影响
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790086
Morteza Montazerozohori, Mohammad Hossein Habibi, Shiva Joohari, Vida Khodadostan
{"title":"The Effects of Some Operational Parameters in Photodegradation of Benzylamine and Aniline and Their Kinetics in Aqueous Suspension of TiO2 and Pt–Loaded TiO2","authors":"Morteza Montazerozohori,&nbsp;Mohammad Hossein Habibi,&nbsp;Shiva Joohari,&nbsp;Vida Khodadostan","doi":"10.1002/adic.200790086","DOIUrl":"10.1002/adic.200790086","url":null,"abstract":"<p>Photocatalytic degradation of benzylamine and aniline on TiO<sub>2</sub>, Pt-modified TiO<sub>2</sub>, ZnO and ZnS in aqueous solution has been investigated. The degradation of the compounds follows a pseudo-first-order kinetics according to Langmuir-Hinshelwood model. The degradation process of benzylamine and aniline was evaluated by ninhydrin spectrophotometric method using UV-visible spectrophotometer in λmax= 538 and 525 nm, respectively. The results showed the order of Pt/TiO<sub>2</sub>&gt; TiO<sub>2</sub>&gt; ZnO&gt; ZnS for photocatalytic activity. In addition increasing of the Pt-loading was found to enhance the degradation rate of the compounds up to the optimal amount of 5wt. % onto the surface of TiO<sub>2</sub> so that the rates of degradation were increased about two times. Rate constants for photodegradation of benzylamine and aniline were found to be 1.4×10<sup>-3</sup> min<sup>-1</sup> and 0.7×10<sup>-3</sup> min<sup>-1</sup> for TiO<sub>2</sub> as photocatalyst, while 2.7×10<sup>-3</sup> min<sup>-1</sup> and 1.7×10<sup>-3</sup>min<sup>-1</sup> for (5 wt.%) Pt/TiO<sub>2</sub> as photocatalyst. Running the reactions in various pH (5-11), indicated that the pH= 8 and 10 or Higher are the optimum pH for photocatalytic degradation of benzylamine and aniline respectively. The effects of some other parameters such as amount of photocatalyst, flux of oxygen and irradiation time were evaluated. Furthermore, the Langmuir-Hinshelwood rate constant <i>k<sub>r</sub></i> and adsorption constant <i>K</i><sub>A</sub> for the titled compounds are reported.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Potentiometric Membrane Sensor for the Selective Determination of Pethidine in Pharmaceutical Preparations and Biological Fluids 选择性测定药物制剂和生物液体中哌替啶的电位膜传感器
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790090
Abdalla Shalaby Prof., Maha El-Tohamy, Magda El-Maamly, Hassan Y. Aboul-Enein Prof.
{"title":"Potentiometric Membrane Sensor for the Selective Determination of Pethidine in Pharmaceutical Preparations and Biological Fluids","authors":"Abdalla Shalaby Prof.,&nbsp;Maha El-Tohamy,&nbsp;Magda El-Maamly,&nbsp;Hassan Y. Aboul-Enein Prof.","doi":"10.1002/adic.200790090","DOIUrl":"10.1002/adic.200790090","url":null,"abstract":"<p>The construction and general performance characteristics of a novel potentiometric PVC membrane sensor based on pethidine-phosphomolybdate as electroactive material for the determination of pethidine are described. This sensor exhibits fast, stable and near-Nernstain response 55.24±0.1, over the concentration range 1.10<sup>-2</sup>-1.10<sup>-5</sup>M for pethidine-phosphomolybdate over pH 2-7. No interferences are caused by many organic, inorganic cations, alkaloids and amino acids. The sensor proved useful for determining pethidine in pure forms, pharmaceutical injections and monitoring the content uniformity assay of ampoules. The designed sensor also show good accuracy for the determination of pethidine in biological fluids.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790090","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
An Investigation on Calcium (II) Oxalate as Solubility and Universal Standard 草酸钙作为溶解度和通用标准的研究
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790092
Marco Antonilli, Emilio Bottari, Maria Rosa Festa, Lorella Gentile
{"title":"An Investigation on Calcium (II) Oxalate as Solubility and Universal Standard","authors":"Marco Antonilli,&nbsp;Emilio Bottari,&nbsp;Maria Rosa Festa,&nbsp;Lorella Gentile","doi":"10.1002/adic.200790092","DOIUrl":"10.1002/adic.200790092","url":null,"abstract":"<p>The investigation on calcium (II) oxalate is carried out in order to study its solubility in different ionic media. In the same conditions the protonation constants of oxalate and the stability of complex species have been determined. As the stoichiometric composition of the solid calcium (II) oxalate prepared for the investigation was accurately checked, the salt CaC<sub>2</sub>O<sub>4</sub> · H<sub>2</sub>O is proposed as universal (chelometry, redox, acidimetry) standard. Results of titrations support this possibility.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Contents: Annali di Chimica 10/2007 内容：《化学年鉴》10/2007
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790099
{"title":"Contents: Annali di Chimica 10/2007","authors":"","doi":"10.1002/adic.200790099","DOIUrl":"https://doi.org/10.1002/adic.200790099","url":null,"abstract":"","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137468549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Characteristics of Macroporous Epoxy Resin-Triethylenetetramine Polymer Modified by Sodium Chloroacetate for Copper Chelation in Aqueous Solution 氯乙酸钠改性大孔环氧树脂-三乙基四胺聚合物的合成及性能研究
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790097
Linxi Hou, Feng Jiang, Sui Wang
{"title":"Synthesis and Characteristics of Macroporous Epoxy Resin-Triethylenetetramine Polymer Modified by Sodium Chloroacetate for Copper Chelation in Aqueous Solution","authors":"Linxi Hou,&nbsp;Feng Jiang,&nbsp;Sui Wang","doi":"10.1002/adic.200790097","DOIUrl":"10.1002/adic.200790097","url":null,"abstract":"<p>A novel macroporous resin was prepared from an epoxy resin and triethylenetetramine (TETA) via a polymerization using micro-phase separation. In this novel method the polyethylene glycol (PEG-400) was used as solvent in the initial stage and a phase-separation reagent at later stage of the polymerization was firstly adopted. The resin was modified by sodium chloroacetate and the carboxyl groups were introduced. Its structure was characterized by Fourier transform-infrared spectra (FTIR) and scanning electron microscopy (SEM), respectively. The adsorption-desorption characteristics of the resin for Cu(II) in aqueous solution were investigated in detail using ICP-AES. The interaction between the metal ion and the resin was found to be depended upon the acidity of the medium. The prepared resin is strongly chelating and exhibits a chelating ability that can remove cupric ion in waste water treatment.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27188245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Energy-Dispersive and X-Ray Photoelectron Spectroscopy and Electron Microscopy of New Quininium-Plastic Membrane Electrodes 新型奎宁-塑料膜电极的能量色散、x射线光电子能谱和电子显微镜
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790095
Adel F. Shoukry, Hayat M. Maraffie, Laila A. Al-Shatti
{"title":"Energy-Dispersive and X-Ray Photoelectron Spectroscopy and Electron Microscopy of New Quininium-Plastic Membrane Electrodes","authors":"Adel F. Shoukry,&nbsp;Hayat M. Maraffie,&nbsp;Laila A. Al-Shatti","doi":"10.1002/adic.200790095","DOIUrl":"10.1002/adic.200790095","url":null,"abstract":"<p>New quininium (Qn) plastic membrane electrodes of the conventional type were constructed and characterized. They are based on incorporation of Qn-reineckate (QnRn) ion-pair, Qn-phosphotungstate (Qn<sub>3</sub>-PT), or Qn-phosphomolybdate (Qn<sub>3</sub>PM) ion associate into a poly(vinyl chloride) membrane. The electrodes are selective for Qn and have been successfully used for the determination of Qn<sub>2</sub>SO<sub>4</sub> in pharmaceutical tablets. Nevertheless, they showed, as almost all other ion-selective electrodes, limited life times. Energy dispersive- (EDS) and X-ray photoelectron spectroscopy (XPS), as well as electron microscopy were applied to investigate the cause of this limitation in the life times of the electrodes. The results indicated that the electrodes lose their activity after prolonged soaking as a result of leaching of the ion exchanger from the membranes into the test solution in addition to deformation at the surface of the expired electrode.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Degradation Products of Aniline in the Solutions with Ozone and Kinetic Investigations 苯胺在臭氧溶液中的降解产物及动力学研究
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790096
Kadir Turhan, Suheyla Uzman
{"title":"The Degradation Products of Aniline in the Solutions with Ozone and Kinetic Investigations","authors":"Kadir Turhan,&nbsp;Suheyla Uzman","doi":"10.1002/adic.200790096","DOIUrl":"10.1002/adic.200790096","url":null,"abstract":"<p>Aromatic compounds are extensively used in several industries and can cause pollution in water sources. This work aims at examining the degradability of aniline in aqueous solutions by ozone-induced cleavage, and at determining the kinetics of the cited cleavage reactions. Aniline was prepared in four different concentrations and the flow rate of ozone supplied to each solution was selected. Aniline solutions were ozonated at low and high pH, so as to compare both molecular and hydroxyl free radical mechanisms, respectively. The main identified aromatic by-products were nitrobenzene and azobenzene when the experiment was carried out at acidic pH. Formation of nitrobenzene, azobenzene, azoxybenzene and 2-pyridine carboxylic acid (picolinic acid) was observed when the ozonization was carried out at basic pH. All the aromatic by-products found were less toxic than the raw materials. The pseudo-first-order constants in aniline concentrations were calculated.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Determination of Trace Concentrations of Elements in High Purity Tellurium by Radio Frequency Glow Discharge Optical Emission Spectrometer (RF-GDOES) 射频辉光发射光谱仪(RF-GDOES)测定高纯碲中微量元素浓度
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790088
G. Anil, M.R.P. Reddy, D. S. Prasad, N.R. Munirathnam, T.L. Prakash
{"title":"Determination of Trace Concentrations of Elements in High Purity Tellurium by Radio Frequency Glow Discharge Optical Emission Spectrometer (RF-GDOES)","authors":"G. Anil,&nbsp;M.R.P. Reddy,&nbsp;D. S. Prasad,&nbsp;N.R. Munirathnam,&nbsp;T.L. Prakash","doi":"10.1002/adic.200790088","DOIUrl":"10.1002/adic.200790088","url":null,"abstract":"<p>A method was established for the determination of trace impurities in high purity tellurium (Te) 99.9999 (6N) by radio frequency glow discharge optical emission spectrometry (RF-GDOES). The optimized parameters are power, argon pressure, pre-integration time, analysis time and selection of wavelength. Nine elements Se, Ca, Mg, Si, Fe, Cr, Cu, Ni and Pb were analysed in 6N Te, out of which only three elemental peaks (Se, Ca, and Mg) were detected and the remaining six elements (Si, Fe, Cr, Cu, Ni and Pb) were below detection levels. Finally, the method was evaluated by the analysis of the above traces using inductively coupled plasma mass spectrometry (ICP-MS) and was found to be satisfactory. The detection limits for most of the elements were below 10 ng/g and R.S.D. was around 10 %, which indicated that this method could fully satisfy the requirements for the trace analysis in high purity Te metal.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The Electrochemical Behavior and Direct Determination of Tyrosine at a Glassy Carbon Electrode Modified with Poly (9-Aminoacridine) 聚9-氨基吖啶修饰玻碳电极上酪氨酸的电化学行为及直接测定
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790085
Bin Fang, Hongying Liu, Guangfeng Wang, Yunyou Zhou, Maoguo Li, Yan Yu, Wei Zhang
{"title":"The Electrochemical Behavior and Direct Determination of Tyrosine at a Glassy Carbon Electrode Modified with Poly (9-Aminoacridine)","authors":"Bin Fang,&nbsp;Hongying Liu,&nbsp;Guangfeng Wang,&nbsp;Yunyou Zhou,&nbsp;Maoguo Li,&nbsp;Yan Yu,&nbsp;Wei Zhang","doi":"10.1002/adic.200790085","DOIUrl":"10.1002/adic.200790085","url":null,"abstract":"<p>9-aminoacridine was firstly immobilized on the surface of a glassy carbon electrode to form a poly (9-aminoacridine) film modified electrode. The results demonstrated that the modified electrode exhibited a high degree of catalytic activity towards the oxidation of tyrosine and can resolve the interference of tryptophan in the determination of tyrosine. Compared with the bare electrode, the peak current had obviously increased, and the peak potential had shifted in a negative direction. Under the optimum conditions, a linear response to tyrosine was observed in the concentration of 1.0×10<sup>-6</sup>-2.8×10<sup>-3</sup> M, with a correlation coefficient of 0.9987, and a detection limit (S/N=3) of 1.0×10<sup>-7</sup> M. The modified electrode has been successfully applied to determine the concentration of tyrosine in composite amino acid injections; and it displays excellent repeatability and high sensitivity. The proposed sensor has promising features such as ease of fabrication, good reproducibility, high stability and low cost. And most of all, it has good selectivity.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Digestion of Titanium Bearing Geologic Materials Involving Microwaves 微波消解含钛地质物质
Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790089
Anju Tripathi, Partha Chattopadhyay
{"title":"Digestion of Titanium Bearing Geologic Materials Involving Microwaves","authors":"Anju Tripathi,&nbsp;Partha Chattopadhyay","doi":"10.1002/adic.200790089","DOIUrl":"10.1002/adic.200790089","url":null,"abstract":"<p>An environmentally friendly and rapid digestion procedure involving 10 mL of acid mixture (HNO<sub>3</sub> : HCl : HF = 2:2:1) for 0.1 g of sample in closed vessel microwave digester following heating program : 250W for 10 min., hold time 2 min., 600 W for 17 min, and Ventilation time 10 min was developed. The operating parameters were varied and optimized by factorial design approach using “Steepest Ascent” method. The validity of the recommended digestion procedure were examined by analyzing several well characterized standard reference materials such as diabase (W2), basalt (BIR-1, JB-3, BHVO-1), granite (G2), gabbro (JGb-1), Mn-nodule (Nod-A-1, Nod-P-1), sediment (STSD-4, LKSD-2), limestone (KH-2), soil (SAu-1), ilmenite (IGS-31), rutile (IGS-32), Zircon (IGS-35) and titanium dioxide (SRM-154b) employing both inductively coupled plasma-atomic emission spectrometry (ICP-AES) and well known spectrophotometric method. An excellent agreement between the methods and the certified values of standard reference materials suggest that the digestion procedure can be used for quality control and allied purposes.</p>","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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