A Simple Pre-concentration Method for the Determination of Nickel(II) in Urine Samples Using UV-Vis Spectrophotometry and Flame Atomic Absorption Spectrometry Techniques

Abstract

The cloud point technique was effectively utilized for extraction and pre-concentration of nickel(II) in urine samples before measurement by UV-Vis spectrophotometer and AAS techniques. The metal response to a para-aminophenol (PAP) reagent in a non-ionic surfactant Triton X-114 medium was to form the Ni-PAP complex. The adopted concentration for PAP, concentration of Triton X-114, pH effect and water bath temperature, incubation time, salt effect, and interference effects were all optimized. The calibration curve was linear over the range of (0.0625–1.25) mg L–1 with a correlation coefficient r2 of 0.9682 for the UV-Vis spectrophotometer at a λmax of 629 nm. The limit of detection was 0.005 mg/L. The relative standard deviation for six replicates was 1.07%. This method was applied successfully to determine copper (II) concentrations in 44 urine samples of occupational worker samples as determined by UV-Vis spectrophotometry and FAAS techniques.

Extraction-Spectrophotometric Determination of Nickel With 4-(2-Pyridylazo) Resorcinol in the Neonol Af 9-10 – Water System

“…Проблема токсичности и пожароопасности органических растворителей, используемых в экстракционно-фотометрическом методе анализа, решается применением ионных жидкостей [1,2], глубоко-эвтектических растворителей [3,4] или поверхностно-активных веществ [5][6][7]. Наибольшее распространение при этом получили неионные ПАВ -оксиэтилированные октилфенолы [8,9], нонилфенолы [10,11] и моноалкилполиэтиленгликоли [12]. Однако использование ионных ПАВ в качестве экстрагента [13,14] или добавок микроколичеств ионных ПАВ к экстрактам на основе неионных ПАВ [15,16] Для определения состава комплексного соединения никеля с ПАР, а также константы нестойкости использовались стандартные методы -насыщения, изомолярных серий и разбавления [22,23].…”

Evaluation of Lead Ion in the Wastewater of the Lifting and Treatment Stations Using ICP-MS and CPE Methods

“…The basis of CPE is the turbid behavior of surfactants in aqueous solutions at temperatures approaching cloud point [16]. One of the preferred methods for preconcentrating and separating organic and inorganic metal ions is CPE [17][18]. Because it adheres to the principles of green chemistry, it has attracted a lot of attention.…”

An eco-friendly ultrasound-assisted deep eutectic solvent-based liquid–phase microextraction method for enrichment and quantification of nickel in environmental samples

“…Multiple approaches to preconcentrate and separate Ni(II) have lately been published in the literature, including cloud point extraction [4][5][6][7][8][9][10][11][12], solid-phase extraction [13][14][15][16], membrane filteration [17], and co-precipitation [18][19][20].…”