University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Agricultural

Citations 12

"Combination Of Flow Injection Techniques With Atomic Spectrometry In Agricultural And Environmental Analysis"
Anal. Chim. Acta 1986 Volume 179, Issue 1 Pages 325-340
Zhaolun Fang, Shukun Xu, Xiu Wang and Suchun Zhang

Abstract: A review is presented, with 37 references, in which the applications of the coupled techniques are discussed with emphasis on agricultural and environmental analyzes.
Arsenic Cadmium Selenium Ion exchange Spectrophotometry Spectrophotometry Spectrophotometry Spectrophotometry Spectrophotometry Review Preconcentration Standard additions calibration

"Indirect Determination Of The Pesticide Dimethoxydithiophosphate In An FIA - AAS System With Liquid - Liquid Back-extraction"
Talanta 1991 Volume 38, Issue 8 Pages 857-861
Oroncio Jimenez de Blas, Jose Luis Pereda de Paz and Jesus Hernandez Mendez

Abstract: In the cited FIA - AAS system (details and diagram given) dimethoxydithiophosphate (I) was shaken with 0.01 M nitric acid, CHCl3 and an excess of Cu for 2 min. The organic extract was decanted, the Cu(I)2 complex formed was extracted (x 2) into CHCl3 and Cu was continuously back-extracted into 0.2 M NH4+ - NH3 buffer (pH 10). The extract was injected into a carrier stream of water and Cu was determined by AAS at 324.8 nm. The detection limit was 0.39 ppm of I with a coefficient of variation (n = 9) of 1.6%. Results were comparable to those obtained by standard methods. Interference from Fe and Bi was eliminated by adding an excess of Cu; some thiophosphate pesticides interfered. The method was applied in the determination of malathion in an agricultural formulation.
Pesticides, dimethoxydithiophosphate Spectrophotometry Sample preparation Buffer Extraction Interferences Liquid membrane Indirect Standard method Method comparison

"Continuous-flow Determination Of Reducing Sugars And Sucrose In Natural And Industrial Products With Periodate Oxidation And A Periodate-sensitive Flow-through Electrode"
Analyst 1982 Volume 107, Issue 1281 Pages 1471-1478
E. P. Diamandis and T. P. Hadjiioannou

Abstract: A continuous-flow method for the determination of mixtures of reducing sugars and sucrose in natural and industrial products is described. The sample, before and after hydrolysis of sucrose, reacts with an excess of periodate in a flow system and the decrease in periodate activity is monitored with a periodate-sensitive flow-through electrode. The recorded peak heights are indirectly linearly related to the concentration of reducing sugars in the range 3-18 mM. The sucrose concentration is calculated by difference. The analysis is completely automated, requires no sample pre-treatment except for the hydrolysis of sucrose and samples can be analyzed at a rate of 30 per hour with a relative error and a relative standard deviation of 1-3%. Comparison with Fehling's method for various natural and industrial products gave satisfactory results.
Fructose Glucose Sugars, reducing Sucrose Electrode Electrode

"Utilization Of Flow Injection Analysis In Agrochemical Laboratories"
Agrochemia 1987 Volume 27, Issue 9 Pages 273-276
Karlicek, R.;Dolejsova, J.

Abstract: NA

"Biosensors And Flow Injection Analysis"
Curr. Opin. Biotechnol. 1992 Volume 3, Issue 1 Pages 31-39
Chien-Yuan Chen and Isao Karube

Abstract: A review is presented, with 56 references. Applications of the technique, viz. diagnostic analysis, analysis of food and agricultural products, environmental analysis, are discussed. Combining flow injection analysis with a biosensor is a novel biosensing process which has allowed speedy and accurate analysis. Diagnostic analysis is the most important application for biosensing flow injection analysis, but other applications include bioprocess monitoring, analysis of food and agricultural products, as well as environmental analysis. In addition, the analysis of compounds, such as explosives and abused drugs, and monitoring of Salmonella, the microorganism that causes food poisoning, have been reported.
Sensor Review Process monitoring

"Flow Injection Analysis. A Review"
Fenxi Huaxue 1981 Volume 9, Issue 3 Pages 369-372
Fang, Z.L.

Abstract: NA
Electrode Review

"Ion-selective Electrode-flow Injection Analysis"
Fenxi Huaxue 1986 Volume 14, Issue 5 Pages 387-390
Han, W.;Fan, L.

Abstract: The effects of sample volume, tube length and diameter, peak height and sampling rate on the determination of NH3, F- and Ca were investigated. Optimum conditions of 0.35 mL sample volume in a tube (50 cm x 1 mm) at a flow rate of 5.6 mL min-1 (for 60 samples h-1) were obtained with electrolytes of 1 M NaOH (for NH3), 0.5 M Na citrate (for F-) and 0.2 M NaCl (for Ca) in the carrier stream. The coefficient of variation were <1.7%. Calibration graphs were rectilinear from 0.1 to 10 mM for NH3, F- and Ca with responses of 51, 59 and 30 mV per decade, respectively. The method could be applied to samples of agricultural, pharmaceutical, clinical and environmental materials.
Ammonia Fluoride Calcium Clinical analysis Electrode Electrode Electrode Optimization Theory

"Applications Of Flow Injection Analysis In Agricultural And Environmental Analysis"
Flow Injection Atomic Spectroscopy 1989 Volume 7, Issue 1 Pages 225-257
Zagatto, E.A.G.;Krug, F.J.;Bergamin, H.;Jorgensen, S.S.

Abstract: A review, with 70 references, is presented on flow injection analysis coupled with AAS or AES.
Spectrophotometry Spectrophotometry Review

"Flow Injection Thermospray Mass Spectrometry For The Automated Analysis Of Potential Agricultural Chemicals"
Rapid Commun. Mass Spectrom. 1993 Volume 7, Issue 1 Pages 85-91
Mark J. Hayward, Joseph T. Snodgrass, Michael L. Thomson

Abstract: An automated flow injection thermospray MS system is described which has been constructed from commercially available equipment. A mobile phase of acetonitrile - 0.1 M ammonium acetate (3:2) is pumped (1.4 mL min-1) continuously to the spectrometer ion source and portions (10 µL) of sample solution are automatically injected into the carrier stream. Separate sample injections are made when both positive- and negative-ion spectra are obtained. The autosampler, injector and MS are computer-controlled and the system is capable of analyzing 150 samples day-1 providing molecular weight and structural data.
Mass spectrometry Computer

"Flow Injection Analysis. 2. Equipment And Analytical Applications"
Rev. Chim. 1990 Volume 41, Issue 7-8 Pages 623-628
Danet, A.F.;Luca, C.

Abstract: A review is presented, with 22 references, of the principles and applications of the cited technique for the analysis of food stuffs, agricultrual products, drugs, products of biotechnology and environmental pollutants.
Biotechnology Review

"Applications Of Flow Injection To Samples Of Agricultural Interest"
Tec. Lab. 1985 Volume 9, Issue 120 Pages 18-24
Martinez Calatayud, J.

Abstract: A review is presented, with 50 references, of methods applicable to soil, plants, fertilizers and water.

"Principles And Applications Of Flow Injection Analysis"
Z. Chem. 1984 Volume 24, Issue 3 Pages 81-93
Helmut M&uuml;ller, Volkmar M&uuml;ller

Abstract: Principles of flow injection analysis, including dispersion effects, are described, and the system is discussed in terms of its transport, injection, reaction (e.g., dialysis, dilution, extraction and chemical reaction), detection and data-processing components. An extensive table is presented of applications in clinical, pharmaceutical, water and agricultural chemistry, with details of detection systems and detection limits. Special flow injection methods, e.g., the stopped-flow technique, titration, and closed-system operation, are also discussed. (174 references).
Caffeic acid Ferricyanide Clinical analysis Sample preparation Closed loop Dialysis Dilution Dispersion Extraction Review Stopped-flow