Laboratory Robotics and Automation最新文献_第2页

Fully automated quantitative analysis of chloroaniline in personal cleansing liquid finished products 个人清洁液成品中氯苯胺的全自动定量分析

Laboratory Robotics and Automation Pub Date : 2000-12-18 DOI: 10.1002/1098-2728(2000)12:6<282::AID-LRA2>3.0.CO;2-S

Kyoko Ida, Yukari Kobayashi

{"title":"Fully automated quantitative analysis of chloroaniline in personal cleansing liquid finished products","authors":"Kyoko Ida, Yukari Kobayashi","doi":"10.1002/1098-2728(2000)12:6<282::AID-LRA2>3.0.CO;2-S","DOIUrl":"10.1002/1098-2728(2000)12:6<282::AID-LRA2>3.0.CO;2-S","url":null,"abstract":"This presentation addresses an automated quantitative analysis designed for determination of chloroanilines (CA) in personal cleansing (PC) liquid products containing trichlorocarbonilide (TCC). These materials may be present as impurities in the germicides as used, or they may be formed from the germicides during processing. This is a fully automated analysis which covers everything from sample preparation to determination of CA at the parts per million level. The CA is diazotizated by addition of sodium nitrite. After a prescribed reaction time, the excess nitrous acid is destroyed with ammonium sulfamate. The diazotizated CA is derivatized with naphthylethylene diamine and the level determined by difference in the UV-VIS absorption at approximately on peak (555 nm) and background (660 nm). Linearity, accuracy, and precision ensure the validity of the robotics method. The method has a linearity working range from 0 to 100 ppm (correlation coefficient, R = 0.9995). The method gives acceptable recoveries: R = 102% for liquid soap. Relative standard deviation is 1.14%. These results demonstrate that the system can determine the concentration of CA in PC products. This automated CA analysis frees up analysts from routine laboratory work for more technically difficult projects. The robot is capable of managing 36 samples per day, which is more than three times higher capacity than the manual procedure. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:282–285, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 6","pages":"282-285"},"PeriodicalIF":0.0,"publicationDate":"2000-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:6<282::AID-LRA2>3.0.CO;2-S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87448694","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

Turbidimetric determination of orthophosphate in digested plant material by flow-injection analysis 流动注射分析法浊度法测定消化植物原料中正磷酸盐

Laboratory Robotics and Automation Pub Date : 2000-12-18 DOI: 10.1002/1098-2728(2000)12:5<236::AID-LRA3>3.0.CO;2-L

Maria-Celeste T. Diniz, André Fernando Oliveira, Orlando Fatibello-Filho

{"title":"Turbidimetric determination of orthophosphate in digested plant material by flow-injection analysis","authors":"Maria-Celeste T. Diniz, André Fernando Oliveira, Orlando Fatibello-Filho","doi":"10.1002/1098-2728(2000)12:5<236::AID-LRA3>3.0.CO;2-L","DOIUrl":"10.1002/1098-2728(2000)12:5<236::AID-LRA3>3.0.CO;2-L","url":null,"abstract":"A simple, fast, and low-cost flow-injection system is proposed for the determination of orthophosphate in digested plant material. The determination is based on the precipitation reaction of orthophosphate with 0.05 mol L−1 zinc solution in 0.05 mol L−1 triethanolamine buffer (TEA/TEAH+, pH 6.0) solution containing 0.025% (w/v) poly-(vinylalcohol). The zinc orthophosphate suspension produced was directly measured at 410 nm. Under the best experimental conditions, orthophosphate was determinated in the concentration range from 5 to 60 mg P L−1, and the relative standard deviations were less than 1.6% for 10 and 20 mg P L−1 solutions (n = 9). The analytical frequency was 180 h−1. The results obtained using the proposed FIA procedure and those obtained using a standard spectrophotometric procedure agree at the 95% confidence level. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:236–240, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 5","pages":"236-240"},"PeriodicalIF":0.0,"publicationDate":"2000-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:5<236::AID-LRA3>3.0.CO;2-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88214024","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

Spectrophotometric determination of phosphite in fertilizers in a flow injection system with online sample preparation 流动注射系统在线制样分光光度法测定肥料中的亚硝酸盐

Laboratory Robotics and Automation Pub Date : 2000-12-18 DOI: 10.1002/1098-2728(2000)12:6<286::AID-LRA3>3.0.CO;2-D

José Anchieta Gomes Neto, Helenice Akemi Ito, Kelly das Graças Fernandes, Mercedes de Moraes, Arnaldo Alves Cardoso

{"title":"Spectrophotometric determination of phosphite in fertilizers in a flow injection system with online sample preparation","authors":"José Anchieta Gomes Neto, Helenice Akemi Ito, Kelly das Graças Fernandes, Mercedes de Moraes, Arnaldo Alves Cardoso","doi":"10.1002/1098-2728(2000)12:6<286::AID-LRA3>3.0.CO;2-D","DOIUrl":"10.1002/1098-2728(2000)12:6<286::AID-LRA3>3.0.CO;2-D","url":null,"abstract":"A flow injection system with online sample preparation is proposed for the determination of phosphite in liquid fertilizers by spectrophotometry. After loop-based injection, phosphite is oxidized by an acidic permanganate solution (1.0 10−2 mol L−1 KMnO4 + 1.0 mol L−1 H2SO4) in a heated reactor (50 °C). The phosphate generated is then determined by the molybdenum blue method. Influence of flow rates, temperature, and concentration and order of addition of reagents, sample volume, and reactor configuration for the blue complex formation on recorded signals were investigated. The flow system was applied to phosphite determination in commercial samples of liquid fertilizers. The proposed system handles about 80 samples per hour [0.05–0.40% (w/v) H3PO3; R = 0,9998), consuming about 80 μL sample, 1 mg KMnO4, 25 mg (NH4)6Mo7O24, and 10 mg ascorbic acid per determination. Results are precise [relative standard deviation ≤ 3.5% for 0.1% (w/v) H3PO3, n = 12] and in agreement with those obtained by gravimetry at 95% confidence level. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:286–290, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 6","pages":"286-290"},"PeriodicalIF":0.0,"publicationDate":"2000-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:6<286::AID-LRA3>3.0.CO;2-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78707739","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

Thin cathodically electroplated chalcogenide-based ion-selective membranes for flow-injection application 流动注射用阴极电镀硫族离子选择薄膜

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<216::AID-LRA7>3.0.CO;2-E

Milka T. Neshkova

{"title":"Thin cathodically electroplated chalcogenide-based ion-selective membranes for flow-injection application","authors":"Milka T. Neshkova","doi":"10.1002/1098-2728(2000)12:4<216::AID-LRA7>3.0.CO;2-E","DOIUrl":"10.1002/1098-2728(2000)12:4<216::AID-LRA7>3.0.CO;2-E","url":null,"abstract":"An overview is made of the research work carried out in the author's laboratory, which is aimed at developing thin ion-selective chalcogenide membrane by induced cathodic electrodeposition onto inert conducting substrate at controlled potential of the membrane's components. The most important analytical results from implementing them in flow-injection analysis are presented. The basic principle and the major advantages of the electrochemical approach are outlined, with an emphasis on its contribution to obtaining new optimized membrane formulations such as Cu2-xSe, CuAgSe, and Ag2+ō Se1−xTex with improved dynamic and surface properties. Selected examples of the performance of the newly developed ion-selective flow-injection potentiometric (ISFIP) detectors for Cu(II), Hg(II), Ag(I), and CN− ions are considered with regard to lower linearity limit, selectivity, long-term stability as well as unique FIP applications. A comparison with the dynamic behavior of the commercially available ion-selective electrodes or their second-kind electrode counterparts prepared by anodic dissolution helps to reveal the aspects of the competitiveness of the proposed ISFIP detectors. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:216–225, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 4","pages":"216-225"},"PeriodicalIF":0.0,"publicationDate":"2000-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:4<216::AID-LRA7>3.0.CO;2-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78562750","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: 6

An optical membrane redox chemical sensor for the determination of ascorbic acid 一种测定抗坏血酸的光学膜氧化还原化学传感器

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<200::AID-LRA5>3.0.CO;2-2

Damien T. Newcombe, Terence J. Cardwell, Robert W. Cattrall, Spas D. Kolev

{"title":"An optical membrane redox chemical sensor for the determination of ascorbic acid","authors":"Damien T. Newcombe, Terence J. Cardwell, Robert W. Cattrall, Spas D. Kolev","doi":"10.1002/1098-2728(2000)12:4<200::AID-LRA5>3.0.CO;2-2","DOIUrl":"10.1002/1098-2728(2000)12:4<200::AID-LRA5>3.0.CO;2-2","url":null,"abstract":"The redox indicator, ferroin, tris(1,10-phenanthroline)iron(II) was incorporated into the perfluorosulfonated cation-exchange membrane Nafion and, together with optical fibers, a photodiode, and a light-emitting diode, was used for the construction of a redox optical sensor (optode). The optode was incorporated in the flow-through cell of a computer-controlled sequential injection (SI) system and used for the determination of ascorbic acid (vitamin C). A linear relationship between the logarithm of the ascorbic acid concentration and the membrane absorbance was obtained for the concentration range from 2.50 × 10−3 to 1.00 × 10−1 mol L−1 and a sample frequency of 17 h−1. The concentration of ascorbic acid determined in a number of commercial pharmaceutical products agreed well with iodometric titration results. This result shows that the SI system incorporating the ferroin/Nafion optode is suitable for the automated analysis of ascorbic acid in pharmaceutical products. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:200–204, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 4","pages":"200-204"},"PeriodicalIF":0.0,"publicationDate":"2000-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:4<200::AID-LRA5>3.0.CO;2-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89351253","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: 11

Enhancement of selectivity of electrochemical detectors by kinetic discrimination in flow-injection systems 流动注射系统中电化学检测器选择性的动力学鉴别

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<205::AID-LRA6>3.0.CO;2-L

Tadeusz Krawczyński vel Krawczyk, Marek Trojanowicz, Nabil El-Murr

引用次数: 3

In situ electrochemical monitoring: from remote sensors to submersible microlaboratories 原位电化学监测:从远程传感器到潜水微实验室

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<178::AID-LRA2>3.0.CO;2-K

Joseph Wang

引用次数: 11

A portable flow-injection instrument incorporating a miniature spectrometer for the real-time monitoring of nitrate in rivers 一种装有微型光谱仪的便携式流动注射仪，用于河流硝酸盐的实时监测

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<183::AID-LRA3>3.0.CO;2-V

Simon Coles, Malcolm Nimmo, Paul Worsfold

{"title":"A portable flow-injection instrument incorporating a miniature spectrometer for the real-time monitoring of nitrate in rivers","authors":"Simon Coles, Malcolm Nimmo, Paul Worsfold","doi":"10.1002/1098-2728(2000)12:4<183::AID-LRA3>3.0.CO;2-V","DOIUrl":"10.1002/1098-2728(2000)12:4<183::AID-LRA3>3.0.CO;2-V","url":null,"abstract":"A field-deployable, flow-injection-based instrument for monitoring nitrate in rivers is described. It incorporates a miniature spectrometer that gives full spectral acquisition (200–700 nm) in real time. This allows the dynamic range to be adjusted in the field to meet local requirements by monitoring at different wavelengths. For pristine environments, a linear range of 0–1 mg L−1 NO3-N (r2 = 0.9998, n = 6) and a detection limit of 0.007 mg L1 NO3-N (based on blank plus 3s) were achieved by monitoring at 597 nm. For impacted environments, a linear range of 0–9 mg L−1 NO3-N (r2 = 0.9998, n = 6) was achieved at 510 nm. Conventional peristaltic pumps were replaced by solenoid-operated, self-priming micropumps, and injection of sample was achieved by a series of electronic switching valves. The pulsations of the micropumps were effectively removed by subtracting the response at a nonabsorbing wavelength (444 nm). Instrument control and data acquisition and processing were done within a graphical programming environment. The monitor was successfully deployed for 3 days at the River Frome in Dorset, United Kingdom. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:183–193, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 4","pages":"183-193"},"PeriodicalIF":0.0,"publicationDate":"2000-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:4<183::AID-LRA3>3.0.CO;2-V","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83920166","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: 6

Editorial notes 社论指出

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<177::AID-LRA1>3.0.CO;2-Q

Robert W. Cattrall Ph.D., D.Sc.

引用次数: 0

Continuous flow analysis of mercury using a chalcogenide glass ion-selective electrode 用硫系玻璃离子选择电极对汞进行连续流动分析

Laboratory Robotics and Automation Pub Date : 2000-08-31 DOI: 10.1002/1098-2728(2000)12:4<194::AID-LRA4>3.0.CO;2-O

Roland De Marco, Bobby Pejcic, Shannon Cook

{"title":"Continuous flow analysis of mercury using a chalcogenide glass ion-selective electrode","authors":"Roland De Marco, Bobby Pejcic, Shannon Cook","doi":"10.1002/1098-2728(2000)12:4<194::AID-LRA4>3.0.CO;2-O","DOIUrl":"10.1002/1098-2728(2000)12:4<194::AID-LRA4>3.0.CO;2-O","url":null,"abstract":"A commercial Hg chalcogenide glass ion-selective electrode (ISE) has been characterized using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, and the compositional data have been used in the fabrication of our own Hg ISE. It is shown that continuous flow analysis (CFA) is suitable for rapid determinations of ultratrace levels of mercury in saline media when used in conjunction with an extrapolation method that predicts the steady-state potential of the Hg ISE by using the initial data following a stepwise change in aHg2+. The CFA technique yields a near-Nernstian response of 28 mV per decade change in aHg2+ in Hg buffers in the range 10−18 to 10−12 M Hg2+. It is shown that the repeatability of the CFA technique in seawater is ±0.03 pHg units, and a seawater matrix effect causes a significant offset and apparent error in the response of the Hg ISE relative to Hg buffer standards. Standard addition CFA may be used to compensate for the seawater matrix interference. © 2000 John Wiley & Sons, Inc. Lab Robotics and Automation 12:194–199, 2000","PeriodicalId":100863,"journal":{"name":"Laboratory Robotics and Automation","volume":"12 4","pages":"194-199"},"PeriodicalIF":0.0,"publicationDate":"2000-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1098-2728(2000)12:4<194::AID-LRA4>3.0.CO;2-O","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73771635","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: 16