Analytical strategies for coupling separation and flow-injection techniques

Clavijo, Sabrina; Avivar, Jessica; Suárez, Ruth; Cerdà, Vı́ctor

doi:10.1016/j.trac.2014.11.019

Cited by 42 publications

(18 citation statements)

References 53 publications

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“…Total or partial automation of flow analytical methods through multicommutation systems using solenoid valves are notable devices for having several advantages such as: reducing reagent consumption, avoiding sample contamination, increasing sampling frequency, decreasing solution dispersion to the detector and decreasing of human errors. [30][31][32] Arduino (and its clone models, such as BlackBoard, Freeduino, among others) is an electronic prototyping platform for hardware of open-source code and free software, being mounted in a single board designed with an Atmel AVR microcontroller with built-in input/output support. Arduino software uses the integrated development environment (IDE) and is available for different operating systems.…”

Section: Use Of Arduino In the Development Of A New And Fast Automatementioning

confidence: 99%

Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

Barreto¹,

Lemos²,

Oliveira³

et al. 2020

J. Braz. Chem. Soc.

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In the present paper, an automated online preconcentration system based on the use of two knotted reactors (KR) was developed for Mn determination in tea samples by flame atomic absorption spectrometry (F AAS). The system automation was performed by using four solenoid valves to switch sample streams and reagents. Valves were driven electronically by an integrated Darlington transistor circuit and controlled by an open-source Arduino hardware platform written in C language. The preconcentration was based on the precipitation process of metal ions complexed with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (5-Br-PADAP) on the inner walls of the reactor, followed by elution with a solution of hydrochloric acid. The optimized system allowed the Mn determination with limit of detection (LOD) of 2.1 mg L-1 , precision (relative standard deviation (RSD), 50.0 mg L-1) of 2.6% and enrichment factors of 8. The system presented a sampling frequency of 60 h-1. The method accuracy was evaluated by analysis of the certified reference material (CRM) apple leaves (NIST 1515) and by addition/ recovery tests obtaining recoveries between 95.2 to 119%. This method was applied in the Mn determination in commercial tea samples purchased from local trade. Manganese levels were found in a concentration range of 2.95 to 123 μg g-1 .

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Section: Use Of Arduino In the Development Of A New And Fast Automatementioning

confidence: 99%

Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

Barreto¹,

Lemos²,

Oliveira³

et al. 2020

J. Braz. Chem. Soc.

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“…The liquid-liquid microextraction based on the DCFM has found wide application for sample preparation [71][72][73] Moreover, the possibility of automation of single-drop headspace microextraction based on the SIA concept has been presented [82].…”

Section: Recent Development and Applicationmentioning

confidence: 99%

Flow Analysis: A Novel Approach For Classification

Vakh

Falkova

Timofeeva

et al. 2016

Critical Reviews in Analytical Chemistry

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“…Automatic on-line analytical methods based on flow injection (FIA) and sequential injection (SIA) analysis have been proved to be versatile, fast, accurate, robust, and efficient analytical tools [1]. These methods have led to the development of less invasive chemical assays with low reagent consumption and waste generation, fulfilling the principles of Green Analytical Chemistry (GAC) [2].…”

Section: Introductionmentioning

confidence: 99%

Automatic On-Line Purge-and-Trap Sequential Injection Analysis for Trace Ammonium Determination in Untreated Estuarine and Seawater Samples

Dimitriadou

Anthemidis

2020

Molecules

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An innovative automatic purge-and-trap (P&T) system coupled with fluorimetric sequential injection (SI), for the on-line separation and preconcentration of volatile compounds, is presented. The truth of concept is demonstrated for the ammonium fluorimetric determination in environmental water samples with complex matrices without any pretreatment. The P&T flow system comprises a thermostated purge-vessel where ammonium is converted into gaseous ammonia and a trap-vessel for ammonia collection. This configuration results in matrix removal as well as analyte preconcentration, avoiding membrane-associated problems. All the main parameters affecting the efficiency of a P&T system were studied and optimized. The proposed method is characterized by a working range of 2.7–150.0 μg L−1 of NH4+, with a detection and quantification limit of 0.80 and 2.66 μg L−1, respectively, for a 10-mL sample consumption. The accuracy of the method was assessed by recovery assays in seawater, estuarine, and lake water samples as well as by the analysis of standard reference material.

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Analytical strategies for coupling separation and flow-injection techniques

Cited by 42 publications

References 53 publications

Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

Flow Analysis: A Novel Approach For Classification

Automatic On-Line Purge-and-Trap Sequential Injection Analysis for Trace Ammonium Determination in Untreated Estuarine and Seawater Samples

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