Flow-batch analysis

Diniz, Paulo Henrique Gonçalves Dias; Almeida, Luciano F.; Harding, David P.

doi:10.1016/j.trac.2012.02.009

Cited by 83 publications

(16 citation statements)

References 44 publications

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“…The initial focus was on the improvement of analytical performance (mainly sampling rate and precision) of classical analytical methods. 15,18,54 The 2 nd trend was exploitation of unconventional processes, such as incomplete derivatizations 8,32 and partial extractions (e.g., dialysis 55 or gas-diffusion), 56 whereas the 3 rd focus was on proposal of new flow modalities, such as sequential injection analysis (SIA), 57 multicommutation, 11 multipumping, 42 flow-batch analysis, 12 multisyringe flow injection analysis, 58 with some advantages and similarities. The 4 th group will probably involve the same trends highlighted in modern analytical chemistry, with emphasis on miniaturization, green chemistry, novel strategies for microextractions, chemical speciation, bioanalysis, and analytical solutions devoted to complex samples (or complex analytical problems).…”

Section: Looking Forward: Research Perspectives On Flow Analysismentioning

confidence: 99%

“…1 Brazilian researchers have effectively contributed to the inception and development of flow injection analysis (FIA), 5 the most successful approach involving unsegmented flows, and the main Brazilian contributions were critically discussed some years ago. 6 The innovations encompassed novel flow approaches (e.g., merging zones, 7 zone trapping, 8 zone sampling, 9 monosegmented flow analysis, 10 multicommutation, 11 and flow-batch analysis), 12 as well as the pioneering coupling to different detection techniques (e.g., flame atomic absorption spectrometry (FAAS), 13 inductively coupled plasma optical emission spectrometry (ICP OES), 14 turbidimetry 15 and enthalpimetry) 16 and processes (e.g., ion-exchange 17 and liquid-liquid extraction). 18 More recent advances include new alternatives for miniaturization (micro-FIA 19 and micro-flow batch analyzers), 20 exploitation of detection by digital images, 21 as well as stepwise elution in sequential injection chromatography.…”

Section: Introductionmentioning

confidence: 99%

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Flow Analysis: Looking Back and Forward

Rocha¹

2018

J. Braz. Chem. Soc.

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Flow analysis changed significantly the way of performing chemical analysis by (i) mechanization of analytical procedures in a continuous flowing stream with minimal sample intercontamination; (ii) analytical measurements without attaining chemical equilibria, thus increasing the applicability of kinetic methods and allowing the exploitation of non-quantitative processes; (iii) exploitation of concentration gradients and (iv) use of unstable reagents or measurement of unstable products. Flow-based procedures are generally characterized by high sample throughput, improved precision, minimized waste generation, and often better selectivity. The performance of detection systems is usually improved because of the in-line sample conditioning and measurements under reproductive dynamic conditions and timing. However, after achieving several innovations, perspectives for further developments have been questioned mainly because of the recent decrease in the number of publications on flow analysis. The aim of this review is then to discuss the impact of flow-based methods on chemical analysis, emphasizing recent applications and developments, including miniaturization, bioanalysis, microextractions, green analytical chemistry and synergic hyphenation with other techniques and processes. The author's personal view about research perspectives in the field is also presented.

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Section: Looking Forward: Research Perspectives On Flow Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flow Analysis: Looking Back and Forward

Rocha¹

2018

J. Braz. Chem. Soc.

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“…This system is an instantaneous stop chamber flow system, which integrates batch and flow analysis methods, through the use of programmed multi-commutation [2,3]. The main component is the mixing chamber where the whole analytical process, including fluid addition, sample pretreatment, homogenization, precipitation, extraction, preparation of standard solutions and detection, takes place under the total control of the software [4]. The sample is processed with less: manipulation, consumption of reagents and samples, waste and chance of human error.…”

Section: Introductionmentioning

confidence: 99%

A digital image-based micro-flow-batch analyzer

Lima

Andrade

Barreto

et al. 2013

Microchemical Journal

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This paper introduces for the first time the combination of digital images taken with a webcam and a microflow-batch analyzer as a novel strategy for implementing quantitative chemical analysis. The digital imagebased micro-flow-batch analyzer (DIB-μFBA) was formed using urethane-acrylate resin, glass slides and ultraviolet lithography. The glass slides were used as sealant layers on both sides of the substrate urethane-acrylate and provide the necessary transparency to the microsystem to conduct studies using digital images. DIB-μFBA uses digital images obtained from a webcam with CCD sensor, based on the RGB (red-green-blue) color model. The analyzer was used for determining the tannins in green tea employing the well-known ferrous tartrate method. All standard solutions were prepared in-line, and all analytical processes were completed by simply changing the operational parameters in DIB-μFBA control software. The paired t test, at a 95% confidence level, showed no statistically significant differences between results obtained by DIB-μFBA and the spectrophotometric reference method. The proposed microsystem presented satisfactory physical and chemical properties while keeping the flexibility, versatility, robustness and multi-task characteristics of conventional flow-batch analysis. Therefore, it was possible to build a low-cost device with high sample throughput (about 190 h −1 ) and reduced reagent consumption (about 300 times less than the reference method), contributing to the basic principles of green chemistry and the advancement of micro-analytical procedures.

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“…54 Currently, the combination of a flow-based technique such as 55 flow injection analysis (FIA) (Tontrong et al, 2012;Lopez-56 Gonzalvez et al, 2008;Themelis and Kika, 2006;Rodrigues 57 et al, 2005), sequential injection analysis (SIA) (Mesquita and 58 Rangel, 2008;Themelis and Kika, 2006;Al-Kindy et al, 2003), 59 multisyringe flow injection analysis (MSFIA) (Vanloot et al, 2007) 60 and flow-batch analysis (FBA) (Honorato et al, 2001) with 61 spectrophotometric detection methods increase the automation 62 degrees and sample throughput for analysis of aluminium in 63 various samples. 64 The flow-batch analysis system is one of the flow-based 65 analytical systems which provide automation for sample prepara-66 tion and detection (Diniz et al, 2012). In this system, the sampling 67 step and the sample/reagents transportation are done in the same 68 way as in a flow analyzer, whereas mixing and reaction is …”

mentioning

confidence: 99%