title: Simultaneous determination of rare earth elements in ore and anti-corrosion coating samples using a portable capillary electrophoresis instrument with contactless conductivity detection.
abstract: The employment of an in-house-made capillary electrophoresis (CE) instrument with capacitively coupled contactless conductivity detection (C(4)D) as a simple and inexpensive solution for simultaneous determination of many rare earth elements (REEs) in ore samples from Vietnam, as well as in anti-corrosion coating samples is reported. 14 REEs (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) were determined using an electrolyte composed of 20mM arginine and 10mM α-hydroxyisobutyric acid adjusted to pH 4.2 with acetic acid. The best detection limit achieved was 0.24mg/L using the developed CE-C(4)D method. Good agreement between results from CE-C(4)D and the confirmation method (ICP-MS) was achieved, with a coefficient of determination (r(2)) for the two pairs of data of 0.998.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, Hanoi University of Science, Vietnam National University - 19 Le Thanh Tong, Hanoi, Vietnam.
authors.forename: Thi Anh Huong
authors.initials: TA
authors.lastname: Nguyen
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, Hanoi University of Science, Vietnam National University - 19 Le Thanh Tong, Hanoi, Vietnam.
authors.forename: Van Ri
authors.initials: VR
authors.lastname: Nguyen
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, Hanoi University of Science, Vietnam National University - 19 Le Thanh Tong, Hanoi, Vietnam.
authors.forename: Duc Dung
authors.initials: DD
authors.lastname: Le
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, Hanoi University of Science, Vietnam National University - 19 Le Thanh Tong, Hanoi, Vietnam; Faculty of Chemistry, University of Quy Nhon - 170 An Duong Vuong, Quy Nhon, Binh Dinh, Vietnam.
authors.forename: Thi Thanh Binh
authors.initials: TT
authors.lastname: Nguyen
authors.affiliation: Faculty of Chemistry, University of Quy Nhon - 170 An Duong Vuong, Quy Nhon, Binh Dinh, Vietnam.
authors.forename: Van Hoang
authors.initials: VH
authors.lastname: Cao
authors.affiliation: Institute for Technology of Radioactive and Rare Elements, 48 Lang Ha, Hanoi, Vietnam.
authors.forename: Thi Kim Dung
authors.initials: TK
authors.lastname: Nguyen
authors.affiliation: Institute of General Organic Chemistry (IQOG), Spanish National Research Council (CSIC), Calle Juan de la Cierva 3, 28006 Madrid, Spain.
authors.forename: Jorge
authors.initials: J
authors.lastname: Sáiz
authors.affiliation: University of Basel, Department of Chemistry, Spitalstrasse 51, 4056 Basel, Switzerland.
authors.forename: Peter C
authors.initials: PC
authors.lastname: Hauser
authors.affiliation: Centre for Environmental Technology and Sustainable Development (CETASD), Hanoi University of Science, Nguyen Trai Street 334, Hanoi, Vietnam(1). Electronic address: maithanhduc83@gmail.com.
authors.forename: Thanh Duc
authors.initials: TD
authors.lastname: Mai
mesh_terms: D001120:Arginine; D003343:Corrosion; D004573:Electrolytes; D019075:Electrophoresis, Capillary / Q000379:methods; D019652:Extraction and Processing Industry; D006863:Hydrogen-Ion Concentration; D006885:Hydroxybutyrates; D057230:Limit of Detection; D008674:Metals, Rare Earth / Q000032:analysis*; D014744:Vietnam
chemical_list: D004573:Electrolytes; D006885:Hydroxybutyrates; D008674:Metals, Rare Earth; D001120:Arginine; C008039:2-hydroxyisobutyric acid
keywords: Capacitively coupled contactless conductivity detection (C(4)D); Capillary electrophoresis (CE); In-houses-made instrument; Ore samples; Rare earth elements (REEs); Vietnam