Pub Date : 1999-12-01DOI: 10.1016/S1381-141X(99)80005-7
{"title":"Expert systems and prediction methods","authors":"","doi":"10.1016/S1381-141X(99)80005-7","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)80005-7","url":null,"abstract":"","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 3","pages":"Pages 187-190"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)80005-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72090218","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}
Pub Date : 1999-12-01DOI: 10.1016/S1381-141X(99)80011-2
{"title":"Statistical theory and mathematics with application to chemistry","authors":"","doi":"10.1016/S1381-141X(99)80011-2","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)80011-2","url":null,"abstract":"","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 3","pages":"Pages 283-326"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)80011-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72057027","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00018-0
M. L. Mena, M. Gómez, M. Palacios, C. Cámara
{"title":"Fast on-line selenium determination in enriched yeast slurry by microwave digestion–hydride generation–atomic absorption spectroscopy","authors":"M. L. Mena, M. Gómez, M. Palacios, C. Cámara","doi":"10.1016/S1381-141X(99)00018-0","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00018-0","url":null,"abstract":"","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"90 1","pages":"159-165"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89067855","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00014-3
C. G. Pinto, M. F. Laespada, J. P. Pavón, B. M. Cordero
{"title":"Analytical applications of separation techniques through membranes","authors":"C. G. Pinto, M. F. Laespada, J. P. Pavón, B. M. Cordero","doi":"10.1016/S1381-141X(99)00014-3","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00014-3","url":null,"abstract":"","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"2 1","pages":"115-130"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85799502","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00016-7
Nelson Maniasso , Elias A.G. Zagatto , Salette Reis , João L.M. Santos , José L.F.C. Lima
A photochemical flow-injection methodology for the fluorimetric determination of fenvalerate, a nonfluorescent pyrethroid pesticide, is proposed. The sample was irradiated by ultraviolet light inside a reaction coil in a nonstop mode and the photodegradation products were monitored by spectrofluorimetry at λexc=277 nm, λem=329 nm. The exploitation of a micellar medium resulted in a pronounced fluorescence enhancement with a concomitant tenfold sensitivity improvement. Several surfactants were evaluated, and best results were obtained with sodium dodecylsulphate (SDS). The calibration plot was linear within 2.0×10−6 and 1.0×10−5 mol l−1 fenvalerate. The proposed system is very stable, handles 30 samples h−1 and requires only 60 μmol SDS per determination. The detection limit is 5×10−7 mol l−1. The method was evaluated in the determination of fenvalerate in tap water.
{"title":"Exploitation of micellar medium for photochemical-spectrofluorimetric flow-injection determination of fenvalerate","authors":"Nelson Maniasso , Elias A.G. Zagatto , Salette Reis , João L.M. Santos , José L.F.C. Lima","doi":"10.1016/S1381-141X(99)00016-7","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00016-7","url":null,"abstract":"<div><p><span>A photochemical flow-injection methodology for the fluorimetric determination of fenvalerate<span>, a nonfluorescent pyrethroid pesticide, is proposed. The sample was irradiated by ultraviolet light inside a reaction coil in a nonstop mode and the photodegradation products were monitored by spectrofluorimetry at </span></span><em>λ</em><sub>exc</sub>=277 nm, <em>λ</em><sub>em</sub>=329 nm. The exploitation of a micellar medium resulted in a pronounced fluorescence enhancement with a concomitant tenfold sensitivity improvement. Several surfactants were evaluated, and best results were obtained with sodium dodecylsulphate (SDS). The calibration plot was linear within 2.0×10<sup>−6</sup> and 1.0×10<sup>−5</sup> mol l<sup>−1</sup> fenvalerate. The proposed system is very stable, handles 30 samples h<sup>−1</sup> and requires only 60 μmol SDS per determination. The detection limit is 5×10<sup>−7</sup> mol l<sup>−1</sup>. The method was evaluated in the determination of fenvalerate in tap water.</p></div>","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 2","pages":"Pages 143-148"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)00016-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72110712","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00014-3
Carmelo Garcı́a Pinto , Ma Esther Fernández Laespada , José Luis Pérez Pavón , Bernardo Moreno Cordero
An overview about the analytical applications of membrane-based systems is presented. The different types of membranes (microporous, homogenous, ion-exchange and asymmetric) and the main forces related to the transport through them (differences in concentration, pressure or electrical potential) are briefly discussed.
{"title":"Analytical applications of separation techniques through membranes","authors":"Carmelo Garcı́a Pinto , Ma Esther Fernández Laespada , José Luis Pérez Pavón , Bernardo Moreno Cordero","doi":"10.1016/S1381-141X(99)00014-3","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00014-3","url":null,"abstract":"<div><p>An overview about the analytical applications of membrane-based systems is presented. The different types of membranes (microporous, homogenous, ion-exchange and asymmetric) and the main forces related to the transport through them (differences in concentration, pressure or electrical potential) are briefly discussed.</p></div>","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 2","pages":"Pages 115-130"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)00014-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72074496","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00013-1
Nikolaos S Thomaidis, Constantinos A Georgiou
Flow injection methods developed for the analysis of edible oils are critically reviewed. Oil quality control can be automated using flow injection methods for the determination of acidity, peroxide value, iodine value, 2-thiobarbituric acid reacting substances, antioxidants, sterols, pesticide residues, aniline and heavy metals. Applications range from mere sample transportation to the detector to hyphenated flow injection-chromatographic techniques.
{"title":"Edible oil analysis by flow injection","authors":"Nikolaos S Thomaidis, Constantinos A Georgiou","doi":"10.1016/S1381-141X(99)00013-1","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00013-1","url":null,"abstract":"<div><p><span><span>Flow injection methods developed for the analysis of edible oils are critically reviewed. Oil quality control can be automated using flow injection methods for the determination of acidity, peroxide value, iodine value, 2-thiobarbituric acid reacting substances, </span>antioxidants, sterols, </span>pesticide residues<span>, aniline and heavy metals. Applications range from mere sample transportation to the detector to hyphenated flow injection-chromatographic techniques.</span></p></div>","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 2","pages":"Pages 101-114"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)00013-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72110713","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00015-5
E Luque-Pérez , A Rı́os , M Valcárcel , L.-G Danielsson , F Ingman
A method for the determination of caffeine in coffee and tea samples based on the use of supported liquid membranes coupled to a flow system has been developed. The sample may be analysed both as solid and slurry. In the case of solid sample, this is directly placed in the membrane unit, and when the sample is slurry, this is continuously pumped to the membrane unit. In both cases, the caffeine released from the sample passes through the membrane (PTFE/n-undecane:hexyl ether) into an acidic acceptor stream. This stream flows through a spectrophotometric detector allowing the measurement of the absorbance of caffeine at 274 nm. The method shows a linear range between 0.5 and 15 g l−1, with a relative standard deviation of ±3.7% and a sample throughput of 7–8 samples h−1.
基于与流动系统耦合的支撑液膜的使用，已经开发了一种测定咖啡和茶样品中咖啡因的方法。样品可以作为固体和浆料进行分析。在固体样品的情况下，将其直接放置在膜单元中，当样品为浆料时，将其连续泵送至膜单元。在这两种情况下，从样品中释放的咖啡因通过膜（PTFE/n-十一烷：己基醚）进入酸性受体流。该流流过分光光度检测器，从而能够测量咖啡因在274nm处的吸光度。该方法的线性范围在0.5和15 g l−1之间，相对标准偏差为±3.7%，样品吞吐量为7-8个样品h−1。
{"title":"Spectrophotometric flow injection determination of caffeine in solid and slurry coffee and tea samples using supported liquid membranes","authors":"E Luque-Pérez , A Rı́os , M Valcárcel , L.-G Danielsson , F Ingman","doi":"10.1016/S1381-141X(99)00015-5","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00015-5","url":null,"abstract":"<div><p>A method for the determination of caffeine in coffee and tea samples based on the use of supported liquid membranes coupled to a flow system has been developed. The sample may be analysed both as solid and slurry. In the case of solid sample, this is directly placed in the membrane unit, and when the sample is slurry, this is continuously pumped to the membrane unit. In both cases, the caffeine released from the sample passes through the membrane (PTFE/<em>n</em>-undecane:hexyl ether) into an acidic acceptor stream. This stream flows through a spectrophotometric detector allowing the measurement of the absorbance of caffeine at 274 nm. The method shows a linear range between 0.5 and 15 g l<sup>−1</sup>, with a relative standard deviation of ±3.7% and a sample throughput of 7–8 samples h<sup>−1</sup>.</p></div>","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 2","pages":"Pages 131-142"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)00015-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72110685","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}
Pub Date : 1999-11-01DOI: 10.1016/S1381-141X(99)00017-9
Tomás Pérez-Ruiz , Carmen Martı́nez-Lozano , Antonio Sanz , M.Teresa San Miguel
A flow-injection configuration for the chemiluminescent (CL) determination of chlorpromazine, trimeprazine and trifluoperazine is proposed. The procedure is based on the oxidation of the drugs by Fe(III) perchlorate. The Fe(II) formed is measured by its catalytic effect on the CL luminol reaction in the absence of added oxidant. Linear calibration graphs were obtained between 2.0×10−6 and 1.0×10−4 M for all three drugs. The applicability of the method to the determination of these phenothiazines was demonstrated by investigating the effect of potential interferences and by analysing commercial pharmaceutical preparations.
{"title":"Flow-injection chemiluminescent determination of phenothiazines in pharmaceutical preparations","authors":"Tomás Pérez-Ruiz , Carmen Martı́nez-Lozano , Antonio Sanz , M.Teresa San Miguel","doi":"10.1016/S1381-141X(99)00017-9","DOIUrl":"https://doi.org/10.1016/S1381-141X(99)00017-9","url":null,"abstract":"<div><p><span><span>A flow-injection configuration for the chemiluminescent (CL) determination of chlorpromazine, trimeprazine and </span>trifluoperazine<span> is proposed. The procedure is based on the oxidation of the drugs by Fe(III) perchlorate. The Fe(II) formed is measured by its catalytic effect on the CL luminol reaction in the absence of added oxidant. Linear calibration graphs were obtained between 2.0×10</span></span><sup>−6</sup> and 1.0×10<sup>−4</sup><span> M for all three drugs. The applicability of the method to the determination of these phenothiazines was demonstrated by investigating the effect of potential interferences and by analysing commercial pharmaceutical preparations.</span></p></div>","PeriodicalId":100862,"journal":{"name":"Laboratory Automation & Information Management","volume":"34 2","pages":"Pages 149-158"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1381-141X(99)00017-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72110717","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}
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