A computer-controlled multichannel continuous flow analysis system applied to the measurement of nitrate, chloride and ammonium ions in small samples of rain water

Slanina, J.; Bakker, F.; Bruyn-Hes, A.; Möls, J.J.

doi:10.1016/s0003-2670(01)93748-1

Cited by 61 publications

(12 citation statements)

References 4 publications

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“…As dimensões do elemento de injeção (e.g. : comprimento de uma alça externa), tempo de injeção e outras características específicas de injeção (simultânea 36,37 , seqüencial 38,39 , com divisão de amostra 36 , múltipla 40 , tandem [41][42][43][44] , hidrodinâmica 45 , "nested" 46 [n.t. : injeção baseada em várias seqüências (volume) ou intervalos (tempo).…”

Section: Introdução De Amostras (Com Possibilidade De Introdução De Runclassified

Informações essenciais para a caracterização de um sistema de análise em fluxo

Arruda¹

2005

Quím. Nova

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Section: Introdução De Amostras (Com Possibilidade De Introdução De Runclassified

Informações essenciais para a caracterização de um sistema de análise em fluxo

Arruda¹

2005

Quím. Nova

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“…In flow injection systems, the injected sample volume should always be given, regardless of whether loop-based or time-based injection [35] is concerned. The dimensions of the injecting element (ex: length of an external loop), injection time, and other specific injection characteristics (simultaneous [36,37], sequential [38,39], sample splitting [36], multiple [40], tandem [41][42][43][44], hydrodynamic [45], nested [46]) should be also outlined. In sequential injection systems [9,[12][13][14], samples are aspirated into an unsegmented stream for a specific period at a fixed flow rate using a selection device.…”

Section: Sample Introduction (With Possibility Of Reagent Introduction)mentioning

confidence: 99%

Information essential for characterizing a flow-based analytical system (IUPAC Technical Report)

Zagatto

Staden

Maniasso

et al. 2002

Pure and Applied Chemistry

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Essential aspects for characterization of a flow-based analytical procedure or system are discussed in order to permit the composition of a checklist that will lead to a protocol for reporting results and systems in flow analysis. Aspects more related to chromatographic procedures are not considered. The intent is to present normalized proposals in the field of flow analysis for practitioners and developers.

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“…An excellent overview of the principles and practice of FIA is provided by two Analytica Chimica Acta monographs Hansen, 1978, 1988). Much of the work on FIA involved the analysis of agricultural samples using several different sensing technologies including: spectrophotometric methods Hansen et al, 1977b;Anderson, 1979), atomic absorption and flame emission spectrometry (Reis et al, 1979;Zagatto et al, 1979a,b) and ion-selective electrodes (Hansen et al, 1977a;Ruzicka et al, 1977;Slanina et al, 1978Slanina et al, , 1979Slanina et al, , 1980Alegret et al, 1984;Cardwell et al, 1988;Alegret et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Real-time multi ISFET/FIA soil analysis system with automatic sample extraction

Birrell

Hummel

2001

Computers and Electronics in Agriculture

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Successful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with flow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/ FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (r 2 >0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary before commercialization can be realized. However, the concept of using ISFETs for the real-time analysis of soil nitrates is sound. The rapid response and low sample volumes required by the multi-sensor ISFET/FIA system make it a viable candidate for use in real-time soil nutrient sensing. AbstractSuccessful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with flow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/ FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (r 2 \0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary...

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A computer-controlled multichannel continuous flow analysis system applied to the measurement of nitrate, chloride and ammonium ions in small samples of rain water

Cited by 61 publications

References 4 publications

Informações essenciais para a caracterização de um sistema de análise em fluxo

Informações essenciais para a caracterização de um sistema de análise em fluxo

Information essential for characterizing a flow-based analytical system (IUPAC Technical Report)

Real-time multi ISFET/FIA soil analysis system with automatic sample extraction

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