Room temperature ionic liquid, cetyl pyridinium naphthenate, supported cloud point extractive separation and ultra trace determination of copper in blood and environmental samples

Aswathi, M.; Mathai, Suja; Joseph, Suju C.; Biju, V.M.

doi:10.1080/01496395.2017.1324491

Cited by 7 publications

(1 citation statement)

References 33 publications

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“…Various elements such as lead, cadmium, nickel, chromium, copper, and zinc have been studied demonstrating this action. [3][4][5] Among the metals of environmental interest, copper stands out for problems to the aquatic environment, since they exhibit the same toxicity, persistence, and bioaccumulation in the food…”

Section: Introductionmentioning

confidence: 99%

Determination of Copper and Cadmium in Petroleum Produced Formation Water by Electrothermal Atomic Absorption Spectrometry after Cloud Point Extraction

Souza

Teixeira

Santos

et al. 2020

J. Braz. Chem. Soc.

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Cloud point extraction (CPE) in association with graphite furnace atomic absorption spectrometry (GF AAS) was proposed for preconcentration and quantification of trace amounts of copper and cadmium in samples of saline produced formation water from petroleum exploration. The procedure was based on the formation of hydrophobic complexes of the analytes with 1,5-diphenylthiocarbazone (dithizone) in a micellar media of the surfactant (1,1,3,3-tetramethyl butyl) phenyl-polyethylene glycol (Triton X-114). Constrained mixture design was performed for the optimization of the proportions of the three solutions employed in the CPE: Triton X-114, dithizone, and buffer solution. Under the recommended conditions, the CPE GF AAS procedure allowed to obtain enrichment factors of 18 and 11 times, limits of quantification of 0.030 and 0.12 µg L-1 and precision, expressed as relative standard deviation (RSD, n = 8, 2.0 µg L-1), of 1.1 and 4.3% for copper and cadmium, respectively. The CPE GF AAS method was applied to the determination of copper and cadmium in samples of saline produced formation water from petroleum exploration, and its accuracy was accessed by analyzing certified reference material CASS-5 (Nearshore Seawater Reference Material for Trace Metals) from National Research Council (Canada).

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Section: Introductionmentioning

confidence: 99%