Annali di chimica最新文献_第2页

Synthesis of 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone (HMBATSC) and its Application for Direct and Second Derivative Spectrophotometric Determination of Palladium(II) 2-羟基-3-甲氧基苯甲醛硫代氨基脲酮(HMBATSC)的合成及其在直接和二阶导数分光光度法测定钯(II)中的应用

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790109

I. Srivani, A. Praveen Kumar, P. Raveendra Reddy, K.P.P.R. Mohan Reddy, V. Krishna Reddy

{"title":"Synthesis of 2-Hydroxy-3-Methoxy Benzaldehyde Thiosemicarbazone (HMBATSC) and its Application for Direct and Second Derivative Spectrophotometric Determination of Palladium(II)","authors":"I. Srivani, A. Praveen Kumar, P. Raveendra Reddy, K.P.P.R. Mohan Reddy, V. Krishna Reddy","doi":"10.1002/adic.200790109","DOIUrl":"10.1002/adic.200790109","url":null,"abstract":"2-Hydroxy-3-methoxy benzaldehyde thiosemicarbazone (HMBATSC) has been synthesized and its analytical applications are investigated. A rapid, simple, sensitive and selective spectrophotometric method is developed for the determination of palladium (II) in aqueous dimethyl formamide (DMF). Palladium (II) forms a yellowish M2L3 complex with 2-hydroxy-3-methoxy-benzaldehyde green coloured thiosemicarbazone in the pH range 1.0-7.0 at room temperature. The complex shows absorption maximum at 380nm with molar absorptivity and Sandell's sensitivity of 2.198 × 104 l mol-1 cm-1 and 0.049μg cm-2 respectively. Beer's law is obeyed in the range of 0.426 to 4.257 μg ml-1 of Pd (II). A second order derivative spectrophotometric ethod for the determination of palladium (II) has also been proposed. Interference of various diverse ions has been studied. The proposed method is successfully applied for the determination of palladium in alloy steels and in hydrogenation catalysts.","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85041659","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

Development of Solid Phase Microextraction-High Performance Liquid Chromatographic Method for the Determination of Copper(II) in Environmental Samples Using Morpholine-4-Carbodithioate 固相微萃取-高效液相色谱法测定环境样品中铜(II

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790113

Varinder Kaur, Ashok Kumar Malik

引用次数: 11

Simultaneous Determination of Aluminium and Iron with Hematoxylin Using Spectrophotometric and Orthogonal Signal Correction-Partial Least Squares in Plant and Water 苏木精分光光度法-正交信号校正-偏最小二乘同时测定植物和水中的铝和铁

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790104

Ali Niazi, Javad Zolgharnein, Mohammad Reza Davoodabadi

{"title":"Simultaneous Determination of Aluminium and Iron with Hematoxylin Using Spectrophotometric and Orthogonal Signal Correction-Partial Least Squares in Plant and Water","authors":"Ali Niazi, Javad Zolgharnein, Mohammad Reza Davoodabadi","doi":"10.1002/adic.200790104","DOIUrl":"10.1002/adic.200790104","url":null,"abstract":"Simple and novel spectrophotometric method is described for simultaneous determination of aluminum and iron. The method is based on the colored complexes formed by aluminum and iron with hematoxylin in the presence of cetyltrimethylammonium bromide as a surfactant at pH 5.8. All factors affecting the sensitivity were optimized and the linear dynamic range for determination of aluminum and iron was found. The simultaneous determination of aluminum and iron mixtures by using spectrophotometric methods is a difficult problem, due to spectral interferences. By multivariate calibration methods such as partial least squares (PLS), it is possible to obtain a model adjusted to the concentration values of the mixtures used in the calibration range. Orthogonal signal correction (OSC) is a preprocessing technique used for removing the unrelated information and is a suitable preprocessing method for PLS calibration of mixtures without loss of prediction capacity using spectrophotometric method. In this study, the calibration model is based on absorption spectra in the 360-620 nm range for 25 different mixtures of aluminum and iron. Calibration matrices contained 0.06-21.00 and 0.03-15.00 μg mL-1 of aluminum and iron, respectively. The RMSEP for aluminum and iron with OSC and without OSC were 0.06, 0.08 and 0.24, 0.27, respectively. The proposed method has been applied to the simultaneous determination of aluminum and iron in plant and water samples.","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77139550","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

Kinetic-Catalytic and Spectrophotometric Determination of Hg(II) Using its Catalytic Effect on Ligand Substitution Reaction between Hexacyanoferrate(II) and Pyrazine 六氰铁酸盐(II)与吡嗪之间配体取代反应的动力学催化及光度法测定汞(II

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790103

Radhey Mohan Naik, Pradeep Kumar Singh, Richa Rastogi, Ruchi Singh, Abhinav Agarwal

{"title":"Kinetic-Catalytic and Spectrophotometric Determination of Hg(II) Using its Catalytic Effect on Ligand Substitution Reaction between Hexacyanoferrate(II) and Pyrazine","authors":"Radhey Mohan Naik, Pradeep Kumar Singh, Richa Rastogi, Ruchi Singh, Abhinav Agarwal","doi":"10.1002/adic.200790103","DOIUrl":"10.1002/adic.200790103","url":null,"abstract":"A sensitive, simple and rapid spectrophotometric method for the determination of mercury (II) based on its catalytic effect on the abstraction of coordinated cyanide from hexacyanoferrate (II) by pyrazine has been developed using fixed time procedure. The extent of the reaction is monitored spectrophotometrically by measuring the increase in absorbance at λmax=440 nm of the yellow colored complex, [Fe(CN)5Pz]3− under the reaction conditions; [Fe(CN)6]4−=7.2×10−3 mol L−1, [Pz]=3.75×10−4 mol L−1, temperature=25.0±0.1 °C, pH= 2.50±0.02 and I=0.1 mol L−1(KNO3). The experimental rate data under the conditions used in the present study exhibited a linear dependence between absorbance and [Hg2+] catalyst in the range 5.065–50.15 ng mL−1. The detection limit is found to be 4.01 ng mL−1. The maximum relative standard deviations and percentage errors for mercury(II) determination are found to be 2.2 and 3 % respectively. The percentage recoveries are found to be in the range of 99–102 %. Analytical data fordetermination of mercury(II) is presented together with the application of proposed method in water spiked synthetic mixtures. The validity of the proposed method is tested by comparing the results obtained by present method with atomic absorption spectrometry.","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790103","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75345468","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: 7

Investigation of Distribution of Heavy Metals between Blood Plasma and Blood Cells 重金属在血浆和血细胞中的分布研究

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790118

Stasys Tautkus, Algimantas Irnius, Danute Speiciene, Jurgis Barkauskas, Aivaras Kareiva

引用次数: 5

Highly Thiocyanate-Selective Membrane Electrode Based on the Bis(Benzoylacetone) propylenediimine Copper(II)Complex 基于双(苯甲酰丙酮)丙二亚胺铜(II)配合物的高硫氰酸盐选择性膜电极

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790105

Behzad Rezaei, Soraya Meghdadi, Vajihe Nafisi, Saeid Bagherpour

{"title":"Highly Thiocyanate-Selective Membrane Electrode Based on the Bis(Benzoylacetone) propylenediimine Copper(II)Complex","authors":"Behzad Rezaei, Soraya Meghdadi, Vajihe Nafisi, Saeid Bagherpour","doi":"10.1002/adic.200790105","DOIUrl":"10.1002/adic.200790105","url":null,"abstract":"A potentiometric thiocyanate-selective sensor based on copper(II) bis(benzoylacetone)propylenediimine complex as a new neutral carrier for a thiocyanate-selective electrode is reported. The response mechanism is discussed in view of the UV spectroscopy technique. The sensor displays a near Nernestian slope of -57.4 ± 0.5 mV per decade. The working concentration range of the electrode is 8.0×10-7-1.0×10-1 M with a detection limit of 7.4×10-7 M. The response time of the sensor in the all concentration ranges is very short (5-10 s). The response of the sensor is independent of pH, in the pH range of 1.7–11.5. The best performance was obtained with a membrane composition of 32.69 % PVC, 57.34 % dibutyl phthalate, 6.82 % complex and 3.15 % methyltrioctylammonium chloride (MTOAC) as additive. The proposed electrode is more selective than other proposed methods for determination of thiocyanate ion over a wide variety of common inorganic and organic anions and it was successfully applied to direct determination of thiocyanate in the presence of other anions in biological, water and waste water samples.","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82316557","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

Electrochemical Oxidation and Determination of Norepinephrine in the Presence of Ascorbic Acid and Uric Acid at a Poly(Calconcarboxylic Acid)-Modified Electrode 聚钙羧酸修饰电极上抗坏血酸和尿酸存在下去甲肾上腺素的电化学氧化和测定

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790107

Hong Yao, Yuanyuan Sun, Xinhua Lin, Yuhai Tang, Liying Huang

引用次数: 5

A Modified Glassy Carbon Electrode for Hydrogen Peroxide Sensing 过氧化氢传感用改性玻碳电极

Annali di chimica Pub Date : 2007-11-20 DOI: 10.1002/adic.200790108

Cai-yun Zheng, Shui-hong Chen, Yong-jia Shang, Mao-guo Li

{"title":"A Modified Glassy Carbon Electrode for Hydrogen Peroxide Sensing","authors":"Cai-yun Zheng, Shui-hong Chen, Yong-jia Shang, Mao-guo Li","doi":"10.1002/adic.200790108","DOIUrl":"10.1002/adic.200790108","url":null,"abstract":"In this paper, 4-ferrocenyl benzoic acid (FcBA) was synthesized and the electrochemical behaviors of the synthesized ferrocenyl derivative were studied; Then, the multi-wall carbon nanotubes (MWCNTs) coated FcBA modified glassy carbon (MWCNTs/FcBA/GC) electrode was prepared conveniently and the as-prepared modified electrode was characterized with both electrochemical impedance spectroscopy (EIS) and transmission electron microscopy (TEM). The results suggested that FcBA could coat the MWCNTs tightly in dimethylformamide (DMF) and the coated MWCNTs could be strongly adsorbed on the surface of glass carbon (GC) electrode. The MWCNTs/FcBA/GC electrode exhibited an excellent electrocatalytic activity toward the reduction of hydrogen peroxide. The modifiedelectrode was hence used for the determination of hydrogen peroxide by differential pulse voltammetry (DPV). The linear range of the modified electrode was 2.5×10-6 and 5.0×10-4 mol/l, and the detection limit was estimated to be of 4.8×10-7 mol/l when the signal-to-noise ratio was 3. Further studies indicated that the modified electrode was of a fast response, high sensitivity, good reproducibility, and long-term stability.","PeriodicalId":8193,"journal":{"name":"Annali di chimica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/adic.200790108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85442400","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

Measurements of lower Carbonyls and Hydrocarbons at Ny-Alesund, Svalbard 斯瓦尔巴群岛新奥勒松低羰基和碳氢化合物的测量

Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790087

Rosanna Mabilia, Vincenzo Di Palo, Claudio Cassardo, Carla Ciuchini, Antonello Pasini, Massimiliano Possanzini

{"title":"Measurements of lower Carbonyls and Hydrocarbons at Ny-Alesund, Svalbard","authors":"Rosanna Mabilia, Vincenzo Di Palo, Claudio Cassardo, Carla Ciuchini, Antonello Pasini, Massimiliano Possanzini","doi":"10.1002/adic.200790087","DOIUrl":"10.1002/adic.200790087","url":null,"abstract":"Measurements of gaseous organic compounds were carried out near Ny-Alesund, in the Norwegian Arctic, during September 2004. Twenty alkanes, alkenes and aromatic hydrocarbons from ethane to toluene and six aldehydes and ketones from formaldehyde to butanal, were identified and quantified in air samples. Hydrocarbons showed a quite uniform distribution, with ethane being by far the most abundant component (>1 ppb), followed by propane (>0.4 ppb) and butanes (>0.3 ppb), while for unsaturated homologues, except ethene, concentrations never exceeding 0.05 ppb were observed. This distribution confirmed that hydrocarbon depletion during the transport time from Europe into the Arctic was depending upon their atmospheric lifetimes, calculated relatively to the OH reactivity scale. The presence of short lived hydrocarbons could be associated to local sources of anthropogenic and/or biogenic origin. Although the local air photochemistry played a primary role in the production of lower aldehydes in late summer, the observed mixing ratios of formaldehyde (in the 0.25 – 0.50 ppb range) could not be fully explained by known gas-phase chemistry. In this case additional sources, such as fluxes of formaldehyde from snow pack to the atmosphere and/or local anthropogenic activities, were to be taken into consideration. The possible influences of these sources on HCHO mixing ratios were analysed by means of a backward-trajectory circulation model.","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.200790087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27186682","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: 7

Notices to Authors: Annali di Chimica 10/2007 作者须知:化学年鉴10/2007

Annali di chimica Pub Date : 2007-09-04 DOI: 10.1002/adic.200790098

引用次数: 0