TY - JOUR AU - Brombach, Christoph-Cornelius AU - Lancaster, Shaun T. AU - Dexter, Matthew A. AU - Thompson, K. Clive AU - Corns, Warren T. TI - Stability, preservation and storage of As(iii), DMA, MMA and As(v) in water samples JF - ANALYTICAL METHODS: ADVANCING METHODS AND APPLICATIONS J2 - ANAL METHOD VL - 13 PY - 2021 IS - 28 SP - 3154 EP - 3159 PG - 6 SN - 1759-9660 DO - 10.1039/d1ay00743b UR - https://m2.mtmt.hu/api/publication/32342691 ID - 32342691 AB - Correct handling and preservation of water samples is crucial to ensure their integrity for arsenic speciation measurements. ISO TS 19620:2018 is a method for the determination of arsenic(iii) and arsenic(v) species in waters by liquid chromatography (LC) coupled to inductively coupled plasma mass spectrometry (ICP-MS) or hydride generation atomic fluorescence spectrometry (HG-AFS). During the development of this method, a study was performed to establish the best practices for storage and preservation of samples to maintain the integrity of the arsenic speciation and stability. Four arsenic species were studied: arsenite (As(iii)), arsenate (As(v)), monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA) in three different water types: deionised water, mineral water and natural river water. The effect of sample bottle material, light, storage temperature, and acidification were evaluated. When samples are acidified and refrigerated, they can reliably be stored for up to 12 weeks without significantly affecting the arsenic concentration and speciation. The sample bottle material and light had no affect on the speciation integrity or stability. LA - English DB - MTMT ER - TY - JOUR AU - Cao, Miao AU - Bu, Hao AU - Meng, Qingbo AU - Gao, Yude TI - Effect of surface modification by lead ions on flotation behavior of columbite-tantalite JF - COLLOIDS AND SURFACES A : PHYSICOCHEMICAL AND ENGINEERING ASPECTS J2 - COLLOID SURFACE A VL - 611 PY - 2021 PG - 9 SN - 0927-7757 DO - 10.1016/j.colsurfa.2020.125827 UR - https://m2.mtmt.hu/api/publication/32342692 ID - 32342692 AB - Ta and Nb are listed in the category of strategic metals. Columbite-tantalite is the most abundant Nb- and Ta-containing mineral. The flotation is a promising method for fine columbite-tantalite recovery. However, few studies have been performed on the surface modification and enhanced flotation recovery of columbite-tantalite in presence of benzohydroxamic acid (BHA). This study systematically investigates the surface modification of columbite-tantalite by Pb2+ ions and its effect on columbite-tantalite flotation with BHA as collector. The results show that the Pb2+ modification enhances the adsorption of BHA on the columbite-tantalite surface, increases its hydrophobicity, and consequently improves floatability. Zeta potential measurement and X-ray photoelectron spectroscopy (XPS) analysis reveal that the Pb ionic species (Pb2+ and PbOH+) interact with the columbite-tantalite surface via electrostatic attraction and chemical interaction, generating new active products on the mineral surface, i.e., -O-Pb complexes. The -O-Pb complexes exhibit strong reactivity toward BHA subsequently introduced into the flotation pulp. This leads to a significant improvement in the chemisorption of BHA on the Pb2+-modified columbite-tantalite surface. As a surface modification method, introducing Pb2+ ions can effectively activate the columbite-tantalite surface and increase its floatability. LA - English DB - MTMT ER - TY - JOUR AU - Chen, Shuangyang AU - Kimatu, Benard Muinde AU - Fang, Donglu AU - Chen, Xin AU - Chen, Guitang AU - Hu, Qiuhui AU - Zhao, Liyan TI - Effect of Ultrasonic Treatment on Transformations of Arsenic Species in Edible Mushrooms JF - ANALYTICAL LETTERS J2 - ANAL LETT VL - 53 PY - 2020 IS - 1 SP - 102 EP - 121 PG - 20 SN - 0003-2719 DO - 10.1080/00032719.2019.1639056 UR - https://m2.mtmt.hu/api/publication/31525714 ID - 31525714 AB - A study on the transformations of six arsenic species (arsenocholine (AsC), arsenobetaine (AsB), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), arsenite (As(III)), and arsenate (As(V))) was carried out in aqueous solution by ultrasonic treatment. The transformations of arsenic species increased with time. As the ultrasonic power or temperature was increased, transformations of arsenic species were at first enhanced and then decreased. AsC, AsB, As(III) were the most unstable at 600 W and 20 degrees C. DMA and MMA were stable; AsC was partially transformed to AsB, trimethylarsinic oxide (TMAO), and the more toxic tetramethylarsonium ion (TMA(+)); AsB was partially transformed to TMAO; and As(III) was easily oxidized to As(V). The reduction of As(V) to As(III) was only observed when the temperature was over 60 degrees C. The ultrasound treatment conditions with relatively stable arsenic species were 150 to 300 W, 40 to 80 degrees C, and 0 to 10 min. The relatively stable (150 W, 10 min, 80 degrees C) and unstable (600 W, 60 min, 20 degrees C) ultrasonic condition were applied to mushrooms and the transformations of AsC, AsB, and As(III) were observed. Currently, ultrasound-assisted extraction methods have only focused on the extraction efficiency of arsenic species and ignored their transformations. This study may serve as a guide for improving extraction efficiency without minimal transformation of the arsenic forms to reflect the actual contents in edible mushrooms. The study also provides a theoretical basis for making an accurate risk evaluation of human exposure by taking account of possible arsenic transformations during processing prior to consumption. LA - English DB - MTMT ER - TY - JOUR AU - Cao, Miao AU - Gao, Yude AU - Bu, Hao AU - Qiu, Xianyang TI - Study on the mechanism and application of rutile flotation with benzohydroxamic acid JF - MINERALS ENGINEERING J2 - MINER ENG VL - 134 PY - 2019 SP - 275 EP - 280 PG - 6 SN - 0892-6875 DO - 10.1016/j.mineng.2019.02.016 UR - https://m2.mtmt.hu/api/publication/30985455 ID - 30985455 N1 - Funding Agency and Grant Number: Department of Science and Technology of Guangdong Province, China [2017GDASCX-0301] Funding text: The authors gratefully acknowledge the financial support from the Department of Science and Technology of Guangdong Province, China (Project No. 2017GDASCX-0301). AB - In this study, benzohydroxamic acid (BHA) is first introduced as a collector for rutile flotation, whereas BHA alone exhibits low collecting capacity to rutile. The addition of lead ions effectively improves the flotation of rutile using BHA as a collector. The order of addition for lead ions and BHA significantly affects their interactions with the rutile surface and therefore the rutile flotation recovery. Compared to the traditional method of adding reagents in sequential order, the pre-mixed addition, which first generates lead ion-BHA complexes, improves the adsorption efficiency of BHA on the rutile surface as well as the flotation recovery. Although previous research has investigated the activation mechanism of lead ions in BHA flotation of oxide minerals, most such studies have focused on the positive effects of lead ions on BHA adsorption on the mineral surface. The present work emphasizes a new perspective, considering the adsorption behavior of lead ions on the rutile surface under different BHA collector conditions. It is shown that in the system pre-activated with lead ions, lead species are initially transferred to the rutile surface to activate it for BHA attachment; the pre-absorbed lead species undergo desorption when the BHA collector is added into the bulk solution. In addition, the desorbed lead ions in the bulk solution partly react with the BHA collector, leading to the potential adsorption of hydrophobic lead ion-BHA complexes on the rutile surfaces. However, in a binary mixed lead ion-BHA system, the lead ions react with BHA to form hydrophobic lead ion-BHA complexes at the first stage; these complexes with superior adsorption capacity are then adsorbed on the rutile surface. Visual MINTEQ simulations show that, at the optimum rutile flotation pH similar to 9, this improvement is mainly attributed to the adsorption of [Pb(OH)(A)] on the rutile surfaces. LA - English DB - MTMT ER - TY - CHAP AU - Smith, DR AU - Nordberg, M ED - Nordberg, G.F. ED - Fowler, B.A. ED - Nordberg, M. TI - General Chemistry, Sampling, Analytical Methods, and Speciation T2 - Handbook on the Toxicology of Metals: Fourth Edition PB - Elsevier Inc. CY - Amsterdam SN - 9780123973399 PY - 2014 SP - 15 EP - 44 PG - 30 DO - 10.1016/B978-0-444-59453-2.00002-0 UR - https://m2.mtmt.hu/api/publication/25529769 ID - 25529769 LA - English DB - MTMT ER - TY - CHAP AU - Havezov, I. AU - Tsekulov, E. ED - Ivanicova, L ED - Gallios, GP ED - Vitale, K ED - Vaclavikova, M TI - ARSENIC SPECIES ISOFORMATION - A KEY PROBLEM FOR WATER PURIFICATION T2 - WATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF HIGH-TOXICITY POLLUTANTS PB - Springer Netherlands CY - Dordrecht T3 - NATO Science for Peace and Security Series, ISSN 1874-6519 PY - 2010 SP - 119 EP - 133 PG - 15 UR - https://m2.mtmt.hu/api/publication/31525712 ID - 31525712 AB - Current research suggests that drinking water is the most common pathway for arsenic long-term low dose exposure. It would be advantageous to identify treatment processes that economically remove arsenic from potable water. Therefore, the first objective of this study was to identify the factors, including raw water quality and treatment process parameters, which cause effective (and ineffective) arsenic removal at water treatment plants. Arsenic in groundwater occurs in two oxidation states, As(III) (arsenite) and As(V) (arsenate). Since the removal of arsenic depends on its speciation, determining which species are present in the water is crucial. It is of paramount importance to convert all arsenic species in the ground water to As(V) before any treatment for arsenic removal. In the most treated waters As(V) accounted for almost 100% of the dissolved arsenic. Oxidation is clearly inadequate, if resultant water contains any As(III), and higher degree of oxidation should lead to improved arsenic removal overall. Many authors have shown that conversion between the inorganic forms of arsenic As(III) and As(V) is likely. There is no universally accepted method for preserving As species in water samples. Field separation was investigated as a mean of eliminating the need for preservation. Using small ion exchange cartridges in the field has proven to be a reliable method of separating arsenic species. Once separated, the fractions with the different species are analyzed in a good equipped analytical laboratory. LA - English DB - MTMT ER - TY - JOUR AU - Rahman, F AU - Chen, Z AU - Naidu, R TI - A comparative study of the extractability of arsenic species from silverbeet and amaranth vegetables JF - ENVIRONMENTAL GEOCHEMISTRY AND HEALTH J2 - ENVIRON GEOCHEM HLTH VL - 31 PY - 2009 IS - SUPPL. 1 SP - 103 EP - 113 PG - 11 SN - 0269-4042 DO - 10.1007/s10653-008-9225-2 UR - https://m2.mtmt.hu/api/publication/22035654 ID - 22035654 N1 - Chemicals/CAS: arsenic, 7440-38-2; Arsenic, 7440-38-2 LA - English DB - MTMT ER - TY - CHAP AU - Cornelis, R AU - Nordberg, M ED - Nordberg, G.F. ED - Fowler, B.A. ED - Nordberg, M. ED - Friberg, L.T. TI - General chemistry, sampling, analytical methods, and speciation T2 - Handbook on the Toxicology of Metals PB - Elsevier Inc. CY - Amsterdam SN - 9780123694133 PB - Elsevier Inc. PY - 2007 SP - 11 EP - 38 PG - 28 DO - 10.1016/B978-012369413-3/50057-4 UR - https://m2.mtmt.hu/api/publication/24605289 ID - 24605289 LA - English DB - MTMT ER - TY - JOUR AU - Duarte, F A AU - Pereira, J S F AU - Mesko, M F AU - Goldschmidt, F AU - Flores, É M d M AU - Dressler, V L TI - Evaluation of liquid chromatography inductively coupled plasma mass spectrometry for arsenic speciation in water from industrial treatment of shale JF - SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY J2 - SPECTROCHIM ACTA B VL - 62 PY - 2007 IS - 9 SP - 978 EP - 984 PG - 7 SN - 0584-8547 DO - 10.1016/j.sab.2007.07.002 UR - https://m2.mtmt.hu/api/publication/22035655 ID - 22035655 LA - English DB - MTMT ER - TY - CHAP AU - Dernovics, Mihály AU - Fodor, Péter ED - Sergio, Caroli TI - Sample Preparation Prior to As and Se Speciation. The Determination of Chemical Elements in Food TS - The Determination of Chemical Elements in Food T2 - The Determination of Chemical Elements in Food PB - John Wiley & Sons CY - Hoboken (NJ) SN - 9780470141007 PY - 2006 SP - 597 EP - 642 PG - 46 DO - 10.1002/9780470141007.ch19 UR - https://m2.mtmt.hu/api/publication/1883488 ID - 1883488 N1 - Kiadás helye: Hoboken, NJ, USA AB - This chapter contains sections titled: * Introduction * Sample Preparation for Total As and Se Analysis Prior to Speciation * Sample Preparation Methods Prior to Se Speciation Analysis * Sample Preparation Methods Prior to As Speciation Analysis * Conclusions * References * Appendix LA - English DB - MTMT ER - TY - JOUR AU - Schaeffer, R AU - Marczika Andrásné Sörös, Csilla AU - Ipolyi, I AU - Fodor, Péter AU - Thomaidis, N S TI - Determination of arsenic species in seafood samples from the Aegean Sea by liquid chromatography-(photo-oxidation)-hydride generation-atomic fluorescence spectrometry JF - ANALYTICA CHIMICA ACTA J2 - ANAL CHIM ACTA VL - 547 PY - 2005 IS - 1 SP - 109 EP - 118 PG - 10 SN - 0003-2670 DO - 10.1016/j.aca.2005.01.032 UR - https://m2.mtmt.hu/api/publication/1721069 ID - 1721069 N1 - Megjegyzés-22035656 Chemicals/CAS: arsenic trioxide, 1303-24-8, 1327-53-3, 13464-58-9, 15502-74-6; arsenic, 7440-38-2; arsenobetaine, 64436-13-1; arsenocholine, 39895-81-3 Department of Applied Chemistry, Corvinus University, Villanyi ut 29-35, 1118 Budapest, Hungary Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Panepistiomopolis, Zografou, 15776 Athens, Greece Cited By :55 Export Date: 31 May 2021 CODEN: ACACA Correspondence Address: Thomaidis, N.S.; Laboratory of Analytical Chemistry, Panepistiomopolis, Zografou, 15776 Athens, Greece; email: ntho@chem.uoa.gr LA - English DB - MTMT ER - TY - JOUR AU - Terlecka, E TI - Arsenic speciation analysis in water samples: A review of the hyphenated techniques JF - ENVIRONMENTAL MONITORING AND ASSESSMENT J2 - ENVIRON MONIT ASSESS VL - 107 PY - 2005 IS - 1-3 SP - 259 EP - 284 PG - 26 SN - 0167-6369 DO - 10.1007/s10661-005-3109-z UR - https://m2.mtmt.hu/api/publication/25534166 ID - 25534166 N1 - Megjegyzés-22035657 Chemicals/CAS: arsenic, 7440-38-2; lipid, 66455-18-3; Arsenates; arsenic acid, 7778-39-4; Arsenicals; arsenosugar; Lipids; Monosaccharides; Organic Chemicals; Water Pollutants, Chemical LA - English DB - MTMT ER - TY - CHAP AU - Welzl, Michael ED - Cornelis, R TI - Front Matter T2 - Handbook of Elemental Speciation II – Species in the Environment, Food, Medicine and Occupational Health PB - John Wiley & Sons CY - Chichester SN - 9780470856000 PB - John Wiley & Sons PY - 2005 SP - i EP - xix DO - 10.1002/0470856009.fmatter UR - https://m2.mtmt.hu/api/publication/24605634 ID - 24605634 LA - English DB - MTMT ER - TY - JOUR AU - Gómez-Ariza, J L AU - Lorenzo, F AU - García-Barrera, T TI - Simultaneous determination of mercury and arsenic species in natural freshwater by liquid chromatography with on-line UV irradiation, generation of hydrides and cold vapor and tandem atomic fluorescence detection JF - JOURNAL OF CHROMATOGRAPHY A J2 - J CHROMATOGR A VL - 1056 PY - 2004 IS - 1-2 SPEC.ISS. SP - 139 EP - 144 PG - 6 SN - 0021-9673 DO - 10.1016/j.chroma.2004.05.079 UR - https://m2.mtmt.hu/api/publication/22035658 ID - 22035658 N1 - Chemicals/CAS: hydrochloric acid, 7647-01-0; methanearsonic acid, 124-58-3; methylmercury, 16056-34-1, 593-74-8; peroxydisulfate potassium, 106015-10-5, 7727-21-1; sodium borohydride, 16940-66-2; Arsenic, 7440-38-2; Mercury, 7439-97-6 LA - English DB - MTMT ER - TY - JOUR AU - Brana, LF AU - Sanchez, F AU - Palacios, MA AU - Bonilla, MM AU - Torralba, R TI - Inorganic arsenic speciation using BAL in natural waters JF - QUIMICA ANALITICA J2 - QUIM ANAL VL - 20 PY - 2002 IS - 4 SP - 181 EP - 186 PG - 6 SN - 0212-0569 UR - https://m2.mtmt.hu/api/publication/25529766 ID - 25529766 LA - English DB - MTMT ER - TY - JOUR AU - Daus, B AU - Mattusch, J AU - Wennrich, R AU - Weiss, H TI - Investigation on stability and preservation of arsenic species in iron rich water samples JF - TALANTA J2 - TALANTA VL - 58 PY - 2002 IS - 1 SP - 57 EP - 65 PG - 9 SN - 0039-9140 DO - 10.1016/S0039-9140(02)00256-4 UR - https://m2.mtmt.hu/api/publication/22035659 ID - 22035659 LA - English DB - MTMT ER - TY - JOUR AU - Gong, Z AU - Lu, X AU - Ma, M AU - Watt, C AU - Le X, C TI - Arsenic speciation analysis JF - TALANTA J2 - TALANTA VL - 58 PY - 2002 IS - 1 SP - 77 EP - 96 PG - 20 SN - 0039-9140 DO - 10.1016/S0039-9140(02)00258-8 UR - https://m2.mtmt.hu/api/publication/22035660 ID - 22035660 LA - English DB - MTMT ER - TY - JOUR AU - Fodor, Péter TI - Minőségbiztosítás a speciációs analitikában JF - MAGYAR KÉMIAI FOLYÓIRAT - KÉMIAI KÖZLEMÉNYEK (1997-) J2 - MAGY KÉM FOLY KÉM KÖZL VL - 106 PY - 2000 IS - 5-6 SP - 192 EP - 200 PG - 9 SN - 1418-9933 UR - https://m2.mtmt.hu/api/publication/25534465 ID - 25534465 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Lindemann, T AU - Prange, A AU - Dannecker, W AU - Neidhart, B TI - Stability studies of arsenic, selenium, antimony and tellurium species in water, urine, fish and soil extracts using HPLC/ICP-MS JF - FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY J2 - FRESENIUS J ANAL CHEM VL - 368 PY - 2000 IS - 2-3 SP - 214 EP - 220 PG - 7 SN - 0937-0633 DO - 10.1007/s002160000475 UR - https://m2.mtmt.hu/api/publication/22035661 ID - 22035661 N1 - Chemicals/CAS: Antimony, 7440-36-0; Arsenic, 7440-38-2; Metals; Selenium, 7782-49-2; Soil; Tellurium, 13494-80-9; Water, 7732-18-5 LA - English DB - MTMT ER -