Journal of Automated Methods & Management in Chemistry最新文献_第2页

Design of a flow-through voltammetric sensor based on an antimony-modified silver electrode for determining lithol rubine B in cosmetics. 基于锑修饰银电极的直流伏安传感器测定化妆品中石蕊红B的设计。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-04-05 DOI: 10.1155/2011/896978

Wang Lai-Hao, Huang Shu-Juan

引用次数: 1

A high-performance liquid chromatography:chemiluminescence method for potential determination of vardenafil in dietary supplement. 高效液相色谱-化学发光法测定膳食补充剂中伐地那非的含量。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-01-20 DOI: 10.1155/2011/982186

Youjun Di, Min Zhao, Yingchun Nie, Fei Wang, Jiagen Lv

{"title":"A high-performance liquid chromatography:chemiluminescence method for potential determination of vardenafil in dietary supplement.","authors":"Youjun Di, Min Zhao, Yingchun Nie, Fei Wang, Jiagen Lv","doi":"10.1155/2011/982186","DOIUrl":"https://doi.org/10.1155/2011/982186","url":null,"abstract":"A flow method of high-performance liquid chromatography (HPLC) seperation and chemiluminescence (CL) detection for sensitive vardenafil analysis in dietary supplements was developed. The vardenafil separation was achieved on a C18 column at 30°C using ethanol-H(3)PO(4) and ethylenediaminetetraacetic acid disodium salt (Na(2)EDTA) aqueous solution (25 : 75, v/v%) as mobile phase. The followed continuous CL detection was conducted based on the strong CL enhancement by the presence of vardenafil to luminol-K(3)Fe(CN)(6) reaction in alkaline medium. At the flow rate of 0.8 mL/min, the vardenafil retention time (t(R)) was 6.4 min. Factors that affected the HPLC resolution and CL detection were studied and optimized. The calibration curve obtained for vardenafil standard was linear in concentration range of 8.0 × 10(-7) ~ 1.0 × 10(-4) mol/L. The relative standard deviations (RSD) of intraday and interday precision were less than 3.5%. The proposed method was applied to the vardenafil determination in oral liquid, wine, and capsule samples.","PeriodicalId":15248,"journal":{"name":"Journal of Automated Methods & Management in Chemistry","volume":"2011 ","pages":"982186"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/982186","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29679808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

A simple automated method for the determination of nitrate and nitrite in infant formula and milk powder using sequential injection analysis. 利用连续进样分析法测定婴儿配方奶粉和奶粉中硝酸盐和亚硝酸盐含量的简便自动方法。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-09-25 DOI: 10.1155/2011/148183

Mariela Pistón, Alicia Mollo, Moisés Knochen

引用次数: 0

Automatic discrimination of the geographical origins of milks by excitation-emission fluorescence spectrometry and chemometrics. 用激发-发射荧光光谱法和化学计量学自动鉴别牛奶的地理来源。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-08-29 DOI: 10.1155/2011/323196

Lu Xu, De-Hua Deng, Chen-Bo Cai, Hong-Wei Yang

{"title":"Automatic discrimination of the geographical origins of milks by excitation-emission fluorescence spectrometry and chemometrics.","authors":"Lu Xu, De-Hua Deng, Chen-Bo Cai, Hong-Wei Yang","doi":"10.1155/2011/323196","DOIUrl":"https://doi.org/10.1155/2011/323196","url":null,"abstract":"This paper presents the automatic discrimination of geographical origins of milks from Western Yunnan Plateau areas and eastern China by excitation-emission fluorescence spectrometry and chemometrics. Genuine plateau milks (n = 60) and milks from eastern China (n = 89) are scanned in the regions of 180-300 nm for excitation and 200-800 nm for emission. Different options of data analysis are investigated and compared in terms of their performance in discriminating milks of different geographical origins: (1) two-way partial least squares discriminant analysis (PLSDA) based on excitation and emission spectra, respectively; (2) two-way PLSDA based on fusion of excitation and emission spectra; (3) three-way PLSDA based on excitation-emission matrix spectra. The two-way PLSDA methods with excitation spectra, emission spectra, and fusion of excitation and emission spectra correctly classify 91.3%, 88.6%, and 95.3% of the milk samples, respectively; while the total accuracy of three-way PLSDA is 96.0%. The results demonstrate the two-way data combining excitation and emission spectra are sufficient to characterize and identify the plateau milks. Considering both model accuracy and the analytical time required, two-way PLS-DA with fusion of excitation and emission spectra is recommended as a reliable and quick method to discriminate plateau milks from ordinary milks.","PeriodicalId":15248,"journal":{"name":"Journal of Automated Methods & Management in Chemistry","volume":"2011 ","pages":"323196"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/323196","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30130884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of a Low-Cost SIA-Based Analyser for Water Samples. 基于sia的低成本水样分析仪的研制。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-07-14 DOI: 10.1155/2011/943465

Moisés Knochen, Alejandro Caamaño, Heinkel Bentos

引用次数: 6

Rapid and automated analytical methods for redox species based on potentiometric flow injection analysis using potential buffers. 基于电位缓冲液的电位流动注射分析的氧化还原物质快速自动化分析方法。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-04-20 DOI: 10.1155/2011/516165

Hiroki Ohura, Toshihiko Imato

{"title":"Rapid and automated analytical methods for redox species based on potentiometric flow injection analysis using potential buffers.","authors":"Hiroki Ohura, Toshihiko Imato","doi":"10.1155/2011/516165","DOIUrl":"https://doi.org/10.1155/2011/516165","url":null,"abstract":"Two analytical methods, which prove the utility of a potentiometric flow injection technique for determining various redox species, based on the use of some redox potential buffers, are reviewed. The first is a potentiometric flow injection method in which a redox couple such as Fe(III)-Fe(II), Fe(CN)(6) (3-)-Fe(CN)(CN)(6) (4-), and bromide-bromine and a redox electrode or a combined platinum-bromide ion selective electrode are used. The analytical principle and advantages of the method are discussed, and several examples of its application are reported. Another example is a highly sensitive potentiometric flow injection method, in which a large transient potential change due to bromine or chlorine as an intermediate, generated during the reaction of the oxidative species with an Fe(III)-Fe(II) potential buffer containing bromide or chloride, is utilized. The analytical principle and details of the proposed method are described, and examples of several applications are described. The determination of trace amounts of hydrazine, based on the detection of a transient change in potential caused by the reaction with a Ce(IV)-Ce(III) potential buffer, is also described.","PeriodicalId":15248,"journal":{"name":"Journal of Automated Methods & Management in Chemistry","volume":"2011 ","pages":"516165"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/516165","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29894176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An environmental friendly procedure for photometric determination of hypochlorite in tap water employing a miniaturized multicommuted flow analysis setup. 采用小型多换向流分析装置对自来水中次氯酸盐光度测定的环境友好型方法。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-05-05 DOI: 10.1155/2011/463286

Sivanildo S Borges, Boaventura F Reis

{"title":"An environmental friendly procedure for photometric determination of hypochlorite in tap water employing a miniaturized multicommuted flow analysis setup.","authors":"Sivanildo S Borges, Boaventura F Reis","doi":"10.1155/2011/463286","DOIUrl":"https://doi.org/10.1155/2011/463286","url":null,"abstract":"A photometric procedure for the determination of ClO(-) in tap water employing a miniaturized multicommuted flow analysis setup and an LED-based photometer is described. The analytical procedure was implemented using leucocrystal violet (LCV; 4,4',4''-methylidynetris (N,N-dimethylaniline), C(25)H(31)N(3)) as a chromogenic reagent. Solenoid micropumps employed for solutions propelling were assembled together with the photometer in order to compose a compact unit of small dimensions. After control variables optimization, the system was applied for the determination of ClO(-) in samples of tap water, and aiming accuracy assessment samples were also analyzed using an independent method. Applying the paired t-test between results obtained using both methods, no significant difference at the 95% confidence level was observed. Other useful features include low reagent consumption, 2.4 μg of LCV per determination, a linear response ranging from 0.02 up to 2.0 mg L(-1) ClO(-), a relative standard deviation of 1.0% (n = 11) for samples containing 0.2 mg L(-1) ClO(-), a detection limit of 6.0 μg L(-1) ClO(-), a sampling throughput of 84 determinations per hour, and a waste generation of 432 μL per determination.","PeriodicalId":15248,"journal":{"name":"Journal of Automated Methods & Management in Chemistry","volume":"2011 ","pages":"463286"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/463286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29998879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A fast optical method for the determination of liquid levels in microplates. 微孔板液面快速测定的光学方法。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-06-18 DOI: 10.1155/2011/805153

Kerstin Thurow, Norbert Stoll, Kai Ritterbusch

引用次数: 5

Flow-injection preconcentration of chloramphenicol using molecularly imprinted polymer for HPLC determination in environmental samples. 分子印迹聚合物流动注射预富集法测定环境样品中氯霉素的含量。

Journal of Automated Methods & Management in Chemistry Pub Date : 2011-01-01 Epub Date: 2011-03-30 DOI: 10.1155/2011/143416

Damian Kowalski, Ewa Poboży, Marek Trojanowicz

{"title":"Flow-injection preconcentration of chloramphenicol using molecularly imprinted polymer for HPLC determination in environmental samples.","authors":"Damian Kowalski, Ewa Poboży, Marek Trojanowicz","doi":"10.1155/2011/143416","DOIUrl":"https://doi.org/10.1155/2011/143416","url":null,"abstract":"The residue of antibiotic chloramphenicol (CAP) is important issue for food quality control and also for the environmental monitoring. It is banned for use in food-producing animals and has very limited use in human medicine, because of its severe impact on human health. Determination of trace level of CAP in environmental samples requires a very sensitive analytical method and efficient preconcentration procedure. CAP can be efficiently preconcentrated in flow-injection system using flow-through reactor packed with molecularly imprinted polymer (MIP), but determination of CAP in eluate from MIP requires the application of chromatographic separation, which was made in reversed-phase HPLC system with UV detection. In optimized conditions the limit of detection for 100 mL sample in HPLC with offline preconcentration on MIP was evaluated as 0.66 mg/L. In hyphenated FIA-HPLC system with zone sampling the LOD for developed method was evaluated as 15 ng/L, which indicates the possibility of using it for analysis of environmental samples.","PeriodicalId":15248,"journal":{"name":"Journal of Automated Methods & Management in Chemistry","volume":"2011 ","pages":"143416"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2011/143416","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29893710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Online determination of trace amounts of tannic Acid in colored tannery wastewaters by automatic reference flow injection analysis. 自动参比流注射法在线测定有色制革厂废水中痕量单宁酸。

Journal of Automated Methods & Management in Chemistry Pub Date : 2010-01-01 Epub Date: 2010-05-17 DOI: 10.1155/2010/920196

Liang Wei

引用次数: 6