A review on sequential injection methods for water analysis

Mesquita, Raquel B. R.; Rangel, António O.S.S.

doi:10.1016/j.aca.2009.06.030

Cited by 88 publications

(39 citation statements)

References 154 publications

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“…Micro Sequential Injection Lab-On-Valve (µSI-LOV) manifolds alleviate the majority of the drawbacks of FIA methods [12][13][14][15]. This technique is thus an attractive approach for shipboard analysis of trace metals since LOV manifolds are compact, fully automated, and provide highly precise fluidic manipulations in a miniaturized flow manifold with minimal reagent consumption and waste production.…”

Section: Graphical Abstractmentioning

confidence: 99%

“…Further mixing is promoted by flow reversal, when the reaction mixture is propelled from HC1 towards the LOV flow cell for to monitor the fluorescence ( Figure 1D). In comparison to the sequencing of sample and reagent zones used in Sequential Injection LOV manifolds [12,14,16], the merging approach employed in this work increases the surface area of contact between the acidic…”

Section: Derivatization and Fluorescence Detection Optimizationmentioning

confidence: 99%

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Determination of trace zinc in seawater by coupling solid phase extraction and fluorescence detection in the Lab-On-Valve format

Grand

Chocholouš

Ruzicka

et al. 2016

Analytica Chimica Acta

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By virtue of their compactness, long-term stability, minimal reagent consumption and robustness, miniaturized sequential injection instruments are well suited for automation of assays onboard research ships. However, in order to reach the sensitivity and limit of detection required for open-ocean determinations of trace elements, it is necessary to preconcentrate the analyte prior its derivatization and subsequent detection by fluorescence. In this work, a novel method for the determination of dissolved zinc (Zn) at subnanomolar levels in seawater is described. The proposed method combines, for

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Section: Graphical Abstractmentioning

confidence: 99%

Section: Derivatization and Fluorescence Detection Optimizationmentioning

confidence: 99%

Determination of trace zinc in seawater by coupling solid phase extraction and fluorescence detection in the Lab-On-Valve format

Grand

Chocholouš

Ruzicka

et al. 2016

Analytica Chimica Acta

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“…In recent years, FIA systems have evolved in ways that have led to the development of sequential injection analysis (SIA) systems. In this case, the injection of the sample and the contact with the reagent flow occur through the selection of the port of a central selector valve in which the mixture is provided with bi-directional movement, alternating the propulsion direction occurring in a single line, in the absence of confluences [2,8]. Due to these characteristics, SIA systems can be considered as differentiated from conventional FIA systems.…”

Section: Introductionmentioning

confidence: 99%

Application of Flow-Injection Spectrophotometry to Pharmaceutical and Biomedical Analyses

Costa¹,

Rezende²,

Tavares³

et al. 2017

Spectroscopic Analyses - Developments and Applications

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The discovery of new drugs, especially when many samples have to be analyzed in the minimum of time, demand the improvement or development of new analytical methods. Various techniques may be employed for this purpose. In this context, this chapter gathers the collection of paper and represents the review of past work on spectrophotometric technique coupled to a continuous flow system to determine low concentrations of several chemical species in different kinds of pharmaceutical and biological samples. A short historical background of the flow-injection analysis technique and a brief discussion of the basic principles and potential are presented. Part of this chapter is devoted to describing the sample preparation techniques, principles, and figures of merit of analytical methods. Representative applications of flow-injection spectrophotometry to pharmaceutical and biomedical analysis are also described.

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“…The possibility of exploiting feedback mechanisms to change sample processing conditions using a unique physical configuration make these approaches attractive to design flow procedures for process monitoring. 2,3 The characteristics of SIA enable automation of diverse operations such as sampling, chemical derivatization, dilution, standard addition and others, improving the reproducibility. Low sample and reagent consumption and small waste generation 4,5 are remarkable features of this technique, following the principles of green chemistry 6 applied to development of clean analytical methods.…”

Section: Introductionmentioning

confidence: 99%

Development of a fluorimetric sequential injection analysis (SIA) methodology for determination of quinine

Infante

Masini

2011

J. Braz. Chem. Soc.

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Desenvolveu-se uma metodologia de análise por injeção sequencial (SIA) para a determinação fluorimétrica de quinino em refrigerantes. Dispersão mínima e mistura eficiente foram obtidas aspirando-se 200 mL de amostra entre duas zonas de 100 mL de reagente (0,10 mol L -1 H 2 SO 4 ) a uma vazão de 250 mL s -1 , usando uma bobina de reação de 50 cm de comprimento (0,8 mm de diâmetro interno). Resposta linear para concentrações (C) entre 0,050 e 100,0 mg L -1 foi descrita por: I = (532 ± 40) + (2,36 ± 0,04) C, com r = 0.999, onde I é intensidade relativa de fluorescência. Coeficiente de variação e limites de detecção e quantificação foram 1,9% (0,50 mg L -1 , n = 10), 2,3 e 4,5 mg L -1 , respectivamente. A frequência de amostragem foi 60 amostras por hora, consumindo 2,2 mL de H 2 SO 4 concentrado e produzindo 4 mL de resíduos por análise. Não foram observadas diferenças significativas entre os resultados obtidos pela metodologia SIA proposta e aqueles obtidos pelo procedimento em batelada.A sequential injection analysis (SIA) methodology was developed for fluorimetric determination of quinine in soft drinks. Minimum dispersion and efficient mixing were achieved by aspirating 200 mL of sample between two 100 mL reagent zones (0.10 mol L -1 H 2 SO 4 ) at flow rate of 250 mL s -1 and using a reaction coil length of 50 cm (0.8 mm internal diameter). Linear response for quinine concentrations (C) between 0.050 and 100.0 mg L -1 was described by: I = (532 ± 40) + (2.36 ± 0.04) C, with r = 0.999, where I is the relative fluorescence intensity. The coefficient of variation and limits of detection and quantification were 1.9% (0.50 mg L -1 n = 10), 2.3 and 4.5 mg L -1 , respectively. The sampling throughput was 60 analyses per hour, consuming 2.2 mL of concentrated H 2 SO 4 and producing 4 mL of wastes per analysis. No statistically significant differences were observed between the results obtained by the proposed SIA methodology and the ones obtained by the batch procedure.Keywords: sequential injection analysis, quinine, fluorimetry, dispersion, optimization IntroductionSequential injection analysis (SIA) is a robust single channel flow technique widely used to automate analytical determinations and process control. It is based on the measurement of a transient signal resulting from sequential injection of defined sample and reagent volumes in a carrier solution under controlled dispersion. 1 The sample processing conditions can be changed by software control as required by the analytical procedure. The possibility of exploiting feedback mechanisms to change sample processing conditions using a unique physical configuration make these approaches attractive to design flow procedures for process monitoring. 2,3 The characteristics of SIA enable automation of diverse operations such as sampling, chemical derivatization, dilution, standard addition and others, improving the reproducibility. Low sample and reagent consumption and small waste generation 4,5 are remarkable features of this technique, following the principles of g...

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A review on sequential injection methods for water analysis

Cited by 88 publications

References 154 publications

Determination of trace zinc in seawater by coupling solid phase extraction and fluorescence detection in the Lab-On-Valve format

Determination of trace zinc in seawater by coupling solid phase extraction and fluorescence detection in the Lab-On-Valve format

Application of Flow-Injection Spectrophotometry to Pharmaceutical and Biomedical Analyses

Development of a fluorimetric sequential injection analysis (SIA) methodology for determination of quinine

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