Author:
Bonacci Mason E.,Almeida M. Inês G. S.,Zhang Yanlin,Kolev Spas D.
Abstract
AbstractThe development of the first microfluidic paper-based analytical device (µPAD) for the speciation of inorganic arsenic in environmental aqueous samples as arsenite (As(III)) and arsenate (As(V)) which implements hydride generation on a paper platform is described. The newly developed µPAD has a 3D configuration and uses Au(III) chloride as the detection reagent. Sodium borohydride is used to generate arsine in the device’s sample zone by reducing As(III) in the presence of hydrochloric acid or both As(III) and As(V) (total inorganic As) in the presence of sulfuric acid. Arsine then diffuses across a hydrophobic porous polytetrafluoroethylene membrane into the device’s detection zone where it reduces Au(III) to Au nanoparticles. This results in a color change which can be related to the concentration of As(III) or total inorganic As (i.e., As(III) and As(V)) concentration. Under optimal conditions, the µPAD is characterized by a limit of detection of 0.43 mg L−1 for total inorganic As (As(III) + As(V)) and 0.41 mg L−1 for As(III) and a linear calibration range in both cases of 1.2–8.0 mg As L−1. The newly developed µPAD-based method was validated by applying it to groundwater and freshwater samples and comparing the results with those obtained by conventional atomic spectrometric techniques.
Graphical abstract
Publisher
Springer Science and Business Media LLC
Reference33 articles.
1. Sharma VK, Sohn M (2009) Aquatic arsenic: toxicity, speciation, transformations, and remediation. Environ Int 35(4):743–759. https://doi.org/10.1016/j.envint.2009.01.005
2. WHO (2017) Guidelines for Drinking-water Quality, 4th edn. World Health Organization, Geneva
3. Brammer H, Ravenscroft P (2009) Arsenic in groundwater: a threat to sustainable agriculture in South and South-East Asia. Environ Int 35(3):647–654. https://doi.org/10.1016/j.envint.2008.10.004
4. Australian and New Zealand Guidelines for Fresh and Marine Water Quality, Volume 1, Chapter 4. Australian and New Zealand Environment and Conservation Council and Agriculture and Resource Management Council of Australia and New Zealand. https://www.waterquality.gov.au/anzguidelines/resources/previous-guidelines/anzecc-armcanz-2000. Accessed 02/06/2022
5. Abbas G, Murtaza B, Bibi I, Shahid M, Niazi NK, Khan MI, Amjad M, Hussain M, Natasha (2018) Arsenic uptake, toxicity, detoxification, and speciation in plants: physiological, biochemical, and molecular aspects. Int J Environ Res Public Health 15(1). https://doi.org/10.3390/ijerph15010059
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