التفاصيل البيبلوغرافية
| العنوان: |
Toward surface-enhanced Raman scattering using electroless substrate for trace arsenic detection and speciation. |
| المؤلفون: |
Adier, Marie, Jurdyc, Anne-Marie, Hurel, Charlotte, Goutaland, François, Michalon, Jean-Yves, Merlen, Alexandre, Dussardier, Bernard, Vouagner, Dominique |
| المصدر: |
Journal of Applied Physics; 2/21/2023, Vol. 133 Issue 7, p1-10, 10p |
| مصطلحات موضوعية: |
RAMAN scattering, SERS spectroscopy, ARSENIC removal (Water purification), CHEMICAL speciation, ARSENIC, ARSENIC in water, CHEMICAL species, ARSENIC compounds |
| الشركة/الكيان: |
WORLD Health Organization |
| مستخلص: |
Arsenic is one of the most toxic elements present in the environment, especially in water. The World Health Organization (WHO) recommends a maximum concentration of arsenic in drinkable water of 10 μg/l (10 ppb). Sensors implementing Surface Enhanced Raman Scattering (SERS) can detect chemical species at low concentrations. The aim of this study is to compare two kinds of silver-coated SERS substrates for detection and speciation of trace, trivalent and pentavalent, inorganic arsenic compounds. One type of substrate was prepared by a classical thermal evaporation technique, and the second type by an electroless process. The thermally evaporated substrates allowed the detection of As(III) only, at a limit of detection (LOD) of approximately 50 mg/l, whereas As(V) could not be detected at any analyte concentration. The electroless substrates allow one to differentiate As(III) and As(V) with a LOD 1 μg/l (1 ppb) equal for each valency, below the WHO recommendation. The electroless substrates show a very large sensitivity across up to five orders of magnitude in terms of analyte concentration. Although the SERS intensity shows a nonlinear behavior over this range of concentrations, these preliminary results are encouraging in the framework of the demonstration of trace As SERS sensors in drinkable water. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |