An environmentally friendly flow system for high-sensitivity spectrophotometric determination of free chlorine in natural waters

Melchert, Wanessa R.; Oliveira, Daniel R.; Rocha, Fábio R.P.

doi:10.1016/j.microc.2010.02.001

Cited by 23 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Souza, Sasaki and Rocha, 2020 [24] made the determination of an emerging pollutant in water, salicylic acid. In addition to these three studies, eleven others [25,33,36,39,40,[42][43][44][45]51,53] also contributed to the SDG 6.…”

Section: Resultsmentioning

confidence: 99%

“…Brondi et al, 2013 [43] determined sulfate in water. The other works [4,19,26,44,51,61,62,64,65] reduce or replaced toxic reagents / solvents with other chemicals that perform the same function but are less harmful to the operator's health and the environment. De Prá Urio and Masini, 2017 [15] evaluated in their work the presence of two herbicides, Simazine and Atrazine, in rivers.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Brazilian Contribution to the Sustainable Development Goals Through Green Chemistry: A Systemic Review

Filho¹,

Korn²,

Guarieiro³

2020

Blucher Engineering Proceedings

View full text Add to dashboard Cite

The growing commitment of Chemistry to the Sustainable Development Goals (SDG) can be expressed through Green Chemistry. This work aims to evaluate the Brazilian contribution to sustainable development through Green Chemistry, in the area of Analytical Chemistry. It was possible to verify a greater number of publications related to the theme for institutions in 8 Brazilian states, with emphasis on São Paulo and Rio Grande do Sul. It was found that all articles evaluated contributed to SDG 12 by proposing analytical methods that reduce the amount of waste generated or propose replacement of toxic reagents / solvents with similar non-harmful ones. It can be concluded that the contribution of Brazilian researchers has been significant in different areas of analytical chemistry, including sample preparation, instrumentation and separation techniques.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Evaluation of Brazilian Contribution to the Sustainable Development Goals Through Green Chemistry: A Systemic Review

Filho¹,

Korn²,

Guarieiro³

2020

Blucher Engineering Proceedings

View full text Add to dashboard Cite

show abstract

“…Common analytical methods, such as colorimetric, spectrophotometric [2,12], chemiluminescence [13], chromatography coupled to mass spectrometry (i.e. electrophilic addition to styrene) [1], as well as iodometric and amperometric titrations have been employed to measure the free chlorine content in water [3].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical detection of free chlorine at inkjet printed silver electrodes

Jović

Cortés‐Salazar

Lesch

et al. 2015

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

A low-cost, reliable and sensitive electrochemical method for free chlorine analysis in water using inkjet printed silver electrodes is presented. Free chlorine detection was based on linear sweep voltammetry (LSV) analysis of AgCl/Ag 2 O films formed over an inkjet printed silver electrode by the spontaneous reaction between silver and free chlorine species (i.e. HClO and ClO − ) present in solution. The formation of AgCl/Ag 2 O films was studied and characterized by high resolution scanning electron microscopy (HR SEM) and X-ray photoelectron spectroscopy (XPS) techniques. LSV characterization demonstrated a quantitative linear relationship between the amount of AgCl/Ag 2 O formed and the concentration of free chlorine in water within a range from 1 to 100 ppm. After optimization of several parameters (e.g. scan rate, reaction time, starting potential), lowest detectable free chlorine concentration was 0.4 ppm (by standard addition method), while the limit of detection (S/N = 3) was equal to 2 ppm, with a sensitivity of 30 μC/ppm. The validation of the proposed methodology was performed by comparison with the standard N,N-diethylparaphenylenediamine (DPD) method for analyzing swimming pool water samples. Finally, it was demonstrated that reproducible and disposable silver electrodes could be easily prepared by inkjet printing in a large scale and in any required geometry to fit on-line and onsite free chlorine analyses requirements.

show abstract