Determination of phosphate in natural water employing a monosegmented flow system with simultaneous multiple injection

Diniz, Maria Celeste Teixeira; Fatibello‐Filho, Orlando; Aquino, Emerson Vidal de; Rohwedder, Jarbas José R.

doi:10.1016/j.talanta.2003.08.016

Cited by 23 publications

(12 citation statements)

References 13 publications

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“…However, sulfate, nitrate, acetate and carbonate do not interfere in concentrations up to 1 mmol/L, silicate can be present up to 500 mol/L. The AsO 4 3− ion is tolerated up to 100 mol/L and AsO 3 3− up to 90 mol/L. Oxalic acid weakly interferes if present at concentrations >250 mol/L.…”

Section: Interferencesmentioning

confidence: 99%

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Microtiter plate assay for phosphate using a europium–tetracycline complex as a sensitive luminescent probe

Duerkop

Turel

Lobnik

et al. 2006

Analytica Chimica Acta

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A new luminescent europium probe is presented for the determination of phosphate (P) in microtiter plate format. The assay is based on the quenching of the luminescence of the europium-tetracycline (EuTc) 1:1 complex by phosphate using a reagent concentration of 20.8 mol/L. The probe is excited at 400 nm and displays a large Stokes' shift of 210 nm. The emission maximum is located at 616 nm. The system works best at neutral pH 7 and is therefore suitable for phosphate determination in biological and biochemical systems. The linear range of the calibration plot is from 5 × 10 −6 mol/L to 7.5 × 10 −4 mol/L of phosphate, and the limit of detection is 3 mol/L.

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Section: Interferencesmentioning

confidence: 99%

“…Therefore, methods were developed for its determination in fertilizers, plants, crops [1,2], natural waters [3,4] and other environmental samples [5]. Phosphate, also, is an important parameter in clinical chemistry [6] and in industry in boiler feed-water to prevent scaling [7].…”

Section: Introductionmentioning

confidence: 99%

Microtiter plate assay for phosphate using a europium–tetracycline complex as a sensitive luminescent probe

Duerkop

Turel

Lobnik

et al. 2006

Analytica Chimica Acta

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“…In addition, the lab-on-a-tip approach reported in this work allows to use very low amount of chemicals and sample to analyze, reducing the waste production that is often related to the use of automatized analysis, i.e. continuous flow analysis, flow injection analysis (FIA) [23,24]. In order to demonstrate this novel approach, we selected copper as the model analyte to be detected in river water.…”

Section: Introductionmentioning

confidence: 99%

A lab-on-a-tip approach to make electroanalysis user-friendly and de-centralized: Detection of copper ions in river water

Cinti

Mazzaracchio

Öztürk

et al. 2018

Analytica Chimica Acta

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The development of portable and user-friendly sensing platforms is a hot topic in the field of analytical chemistry. Among others, electroanalytical approaches exhibit a high amenability for reaching this purpose, i.e. the commercial strips for diabetes care are an obvious success. However, providing fully-integrated and user-friendly methods is the leitmotiv. In this work we evaluate the use of a disposable pipette tip, opportunely configured, to realize the first example of lab-on-a-tip. The combination of a pipette tip, wire electrodes, and cotton wool filter, highlights the suitability of producing a novel one-shot electroanalytical platform that does not require expertise-required tasks. To demonstrate the feasibility of this novel method, copper (Cu) is detected in water samples by means of anodic stripping voltammetry. The quantification is performed directly into the tip that contains a cotton wool filter: the filter has the double function of purifying the matrices from gross impurities and releasing all the pre-loaded reagents necessary for the assay. After optimizing the experimental parameters, the lab-on-a-tip was capable of detecting Cu linearly up to 300 μg/L with a detection limit of 6.3 μg/L. The effectiveness of the platform was confirmed by testing 50, 100, and 150 ppb Cu-spiked river water sample with recovery value comprised between 92 and 103%.

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“…[9][10][11][12] In recent years, many methods for the determination of phosphate ion have been developed. Among them, spectrophotometry based on a chemical reduction of molybdophosphate ion (the molybdenum-blue method) is a representative, and its various versions have been proposed in compliance with many analytical requests.…”

Section: Introductionmentioning

confidence: 99%

Laser-Heating Thermal Modulation Voltammetric Determination of Phosphate Ion Using a Graphite-Reinforced Carbon Electrode

et al. 2009

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12O40]3-), was formed through a reaction between a phosphate ion and molybdate ions in an acidic solution, and its electroreduction was examined in a flow electrolytic cell by TM voltammetry. Measured TM voltammograms showed two peaks corresponding to two successive two-electron reductions of the 12-molybdophosphate ion, and the peak intensities were proportional to the concentration of the phosphate ion. Because of the strong adsorption of 12-molybdophosphate ion onto the GRC electrode, a detection limit as low as 0.8 nmol dm -3 (S/N = 3) was achieved. The determination of phosphate ion in real samples (river water) was carried out by spectrophotometry (the molybdenumblue method) and TM voltammetry, and the determination values obtained by both methods were in a good agreement with each other. These results prove the possibility of TM voltammetry as an electroanalytical method.

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Determination of phosphate in natural water employing a monosegmented flow system with simultaneous multiple injection

Cited by 23 publications

References 13 publications

Microtiter plate assay for phosphate using a europium–tetracycline complex as a sensitive luminescent probe

Microtiter plate assay for phosphate using a europium–tetracycline complex as a sensitive luminescent probe

A lab-on-a-tip approach to make electroanalysis user-friendly and de-centralized: Detection of copper ions in river water

Laser-Heating Thermal Modulation Voltammetric Determination of Phosphate Ion Using a Graphite-Reinforced Carbon Electrode

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