An improved flow system for chloride determination in natural waters exploiting solid-phase reactor and long pathlength spectrophotometry

Bonifácio, Viviane Gomes; Figueiredo-Filho, Luiz C. S.; Marcolino‐Júnior, Luiz H.; Fatibello‐Filho, Orlando

doi:10.1016/j.talanta.2006.11.036

Cited by 32 publications

(9 citation statements)

References 15 publications

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“…Numerous analytical methods for chloride ions in a variety of samples have been developed, such as ion chromatography [17, 18] near-infrared spectrometry [12] spectroscopy [13] light scattering [14] ion-selective electrode method [6, 9, 15, 16] turbidimetric method [17] and flow based methods coupled with different detectors [9, 18, 19]. On the other hand, sensors and biosensors have the advantages of specificity, low cost, ease to use, portability and the ability to furnish continuous real time signals [20-66].…”

Section: Introductionmentioning

confidence: 99%

Amperometric Sensor for Detection of Chloride Ions

Trnková

Adam

Hubálek

et al. 2008

Sensors

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Chloride ion sensing is important in many fields such as clinical diagnosis, environmental monitoring and industrial applications. We have measured chloride ions at a carbon paste electrode (CPE) and at a CPE modified with solid AgNO3, a solution of AgNO3 and/or solid silver particles. Detection limits (3 S/N) for chloride ions were 100 μM, 100 μM and 10 μM for solid AgNO3, solution of AgNO3 and/or solid silver particles, respectively. The CPE modified with silver particles is the most sensitive to the presence chloride ions. After that we approached to the miniaturization of the whole electrochemical instrument. Measurements were carried out on miniaturized instrument consisting of a potentiostat with dimensions 35 × 166 × 125 mm, screen printed electrodes, a peristaltic pump and a PC with control software. Under the most suitable experimental conditions (Britton-Robinson buffer, pH 1.8 and working electrode potential 550 mV) we estimated the limit of detection (3 S/N) as 500 nM.

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Section: Introductionmentioning

confidence: 99%

Amperometric Sensor for Detection of Chloride Ions

Trnková

Adam

Hubálek

et al. 2008

Sensors

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“…Such wide applications imply an urgent requirement for increased selectivity and sensitivity to detect chloride ions. Several methods including chromatography [20,21], light scattering [22], turbidimetry [23], ion selective electrodes [24][25][26][27], near-infrared spectrometry [28], spectroscopy [29], flow-based methods coupled with different detectors [30][31][32], visual sensing [33], laser-induced breakdown spectroscopy [34] have been used for determination of chloride ions. However, these methods are costly, time consuming and require bulk sample volumes as well as huge amount of organic solvent with obscure separation and extraction processes.…”

Section: Introductionmentioning

confidence: 99%

Green synthesized silver NPs: fluorescence sensor for Cl− ions in aqueous solution in biological pH and cell viability study

Dhar

Yadav

Pramanik³

et al. 2020

SN Appl. Sci.

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New green synthesized silver nanoparticles (NPs) (Ag-CS) were prepared by a single step photochemical reaction at room temperature from sugarcane extract and its morphology, structure and spectral properties were characterized by transmission electron microscopy, energy dispersive x-ray analysis, x-xay diffraction, UV-vis and Fourier transform infrared spectroscopy and spectrofluorometry. The NPs were found to be selective and turn-on sensitive fluorescence probe for chloride ions (Cl −). Cell viability of Ag-CS NPs has also been studied.

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“…The application of various metal chloranilates for the spectrophotometric determination of chloride and other ions has already been investigated using silver chloranilate (Sagara et al 1992;Bonif a acio et al 2007), mercury(II) chloranilate (Barney and Bertolacini 1957;Humphrey and Hinze 1971), and barium chloranilate (Schafer 1967). The silver chloranilate immobilization is based on the physical entrapment of the reagent via polymerization reactions of linear polystyrene chains.…”

Section: Introductionmentioning

confidence: 99%

Flow-Injection Spectrophotometric Determination of Captopril Exploiting Silver Chloranilate Solid-Phase Reactor

et al. 2009

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A novel, simple, and rapid flow-injection method for the spectrophotometric determination of captopril in pharmaceutical products, using a solid-phase reactor with silver chloranilate (Ag 2 C 6 Cl 2 O 4 ) immobilized in a polyester resin, is presented. This method explored the formation of an insoluble salt between Ag(I) and captopril in the solid-phase reactor, releasing chloranilate anion (C 6 Cl 2 O 2À 4 ). Then, this anion reacted with ferric ions to produce a complex, FeC 6 Cl 2 O þ 4 , which was monitored spectrophotometrically at 528 nm. The analytical curve was linear in the captopril concentration range from 1.0 Â 10 À5 to 5.0 Â 10 À4 mol l À1 with a detection limit of 8.0 Â 10 À6 mol l À1 . The relative standard deviation (RSD) was 0.35% (n ¼ 10) for a solution of 3.0 Â 10 À4 mol l À1 captopril solution, and an analytical frequency of 70 h À1 was obtained. The effects of excipients frequently found with captopril in pharmaceutical formulations, such as lactose, microcrystalline cellulose, starch, and magnesium stearate, were evaluated using the proposed flow-injection method. None of these substances caused significative interference 973 in the proposed method. The method was successfully applied to the determination of captopril in pharmaceutical products, and the results were compared with results obtained using a potentiometric method.

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An improved flow system for chloride determination in natural waters exploiting solid-phase reactor and long pathlength spectrophotometry

Cited by 32 publications

References 15 publications

Amperometric Sensor for Detection of Chloride Ions

Amperometric Sensor for Detection of Chloride Ions

Green synthesized silver NPs: fluorescence sensor for Cl− ions in aqueous solution in biological pH and cell viability study

Flow-Injection Spectrophotometric Determination of Captopril Exploiting Silver Chloranilate Solid-Phase Reactor

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