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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

etermination of Cadmium in Water Samples by Automated Flow-Batch Cloud Point Extraction (CPE) Hyphenated to High-Resolution Continuum Source Flame Atomic Spectrometry (HR-CS FAAS

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Author(s):
Akiba, Naomi [1] ; Mancini, Rodrigo S. N. [1] ; Carvalho, Alexandre Zatkovskis [1] ; Gaubeur, Ivanise [1]
Total Authors: 4
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Analytical Letters; v. 55, n. 5 AUG 2021.
Web of Science Citations: 0
Abstract

A computer-controlled multicommuted flow-batch system is reported that allows for the online cloud point extraction of metal ions followed by high-resolution continuum source flame atomic absorption spectrometric (HR-CS GFAAS) detection. This approach combines reduced sample and reagent consumption and a short analysis time with the increased precision and sensitivity characteristic of flow-batch analysis and modern extraction techniques. As proof of concept, cadmium in aqueous solutions was determined by the formation of a hydrophobic complex {[}Cd(PAN)(2)]. Parameters related to complex formation (pH, pyridyl-azo-naphthol-PAN concentration, complexation time), cloud point extraction (Triton X-114 concentration, electrolyte composition, rich phase trapping), and the multicommuted flow-batch system (flow rates, timing control) were optimized. A small column packed with hydrophobic cotton was used as the interface between the extraction and detection stages to stack the cadmium-containing rich phase in a short plug. Optimized parameters led to a 5.0 to 75.0 mu g L-1 linear range, 1.3 mu g L-1 limit of detection, 4.3 mu g L-1 limit of quantification and 1.8% coefficient of variation (n = 12). Accuracy was evaluated by analyzing a certified reference material EP-H (drinking water) and by recovery tests employing tap water, groundwater, mineral water, and reuse water samples. (AU)

FAPESP's process: 11/19730-3 - Cloud point extraction (CPE) and dispersive liquid-liquid microextraction (DLLME) applied in the development of analytical methods for metals preconcentration and spectrometric determination
Grantee:Ivanise Gaubeur
Support Opportunities: Regular Research Grants
FAPESP's process: 16/23878-0 - Consolidation and innovation in the research line: analytical methods development combined to liquid phase microextraction
Grantee:Ivanise Gaubeur
Support Opportunities: Regular Research Grants