TY - JOUR AU - Gao, Y. AU - Sturgeon, R.E. AU - Mester, Zoltán AU - Hou, X. AU - Zheng, C. AU - Yang, L. TI - Direct Determination of Trace Antimony in Natural Waters by Photochemical Vapor Generation ICPMS: Method Optimization and Comparison of Quantitation Strategies JF - ANALYTICAL CHEMISTRY J2 - ANAL CHEM VL - 87 PY - 2015 IS - 15 SP - 7996 EP - 8004 PG - 9 SN - 0003-2700 DO - 10.1021/acs.analchem.5b02001 UR - https://m2.mtmt.hu/api/publication/30393650 ID - 30393650 N1 - National Research Council Canada, OttawaON K1A 0R6, Canada College of Geosciences, Chengdu University of Technology, Chengdu, 610059, China Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China Cited By :16 Export Date: 15 January 2019 CODEN: ANCHA Correspondence Address: Yang, L.; National Research Council Canada, OttawaCanada Funding Agency and Grant Number: National Natural Science Foundation of China [21205007, 21128006]; China Scholarship Council; Science and Technology Department of Sichuan province [2014JY0155]; Chengdu University of Technology [KYGG2014] Funding text: The National Natural Science Foundation of China (Grant Nos. 21205007, 21128006), the China Scholarship Council and The National Natural Science Foundation of China (Grant Nos. 21205007, 21128006), the China Scholarship Council, the Scientific Research Fund of Science and Technology Department of Sichuan province (No. 2014JY0155), and the "cultivating program of middle-aged supporting teachers" of Chengdu University of Technology (Grant No. KYGG2014) are acknowledged for financial support. AB - A novel and sensitive approach for the accurate determination of antimony (Sb) in natural waters is described using photochemical vapor generation (PVG) coupled with inductively coupled plasma mass spectrometry (ICPMS) for detection. Utilizing a unique flow-through photochemical reactor capable of subjecting the samples to deep-UV (185 nm) radiation, generation efficiency was found to be independent of whether Sb(III), Sb(V), or organometallic species [trimethyltantimony(V)dibromine, TMSb(V)] were present, eliminating the shortcoming of Sb species depended sensitivity encountered during direct solution nebulization by ICPMS. Furthermore, the potentially severe matrix effect from seawater was efficiently eliminated by using a mixture of 5% (v/v) formic and 15% acetic acids (v/v) as the photochemical reductant, making direct determination of Sb in seawater feasible. The proposed method provides a 15-fold improvement in sensitivity over direct solution nebulization. A method detection limit of 0.0006 ng g-1 based on external calibration was obtained (0.0002 ng g-1 for isotope dilution), yielding a 15-fold improvement over that for direct solution nebulization. Accuracy is demonstrated by analysis of two water certified reference materials (CRMs, e.g., SLRS-6 and NIST 1640a) with satisfying results. In addition, spike recoveries of 100.6 ± 5.5% and 100.8 ± 3.8% (standard deviation, n = 3) were obtained for NASS-6 and CASS-5 seawater CRMs, respectively, since no certified values for Sb has been established for these materials. The performance of several calibration strategies, including double isotope dilution (ID), multiple and single-point gravimetric standard additions with internal standardization, as well as multiple and single-point gravimetric standard additions alone was examined. High precision of determination of Sb in four natural water samples (0.51-1.4%) was realized based on ID calibration, whereas one-point gravimetric standard addition calibration with internal standardization provided precisions of 1.6% and 3.3% at 0.22 and 0.44 ng g-1 levels, respectively, in seawater. © 2015 American Chemical Society. LA - English DB - MTMT ER - TY - JOUR AU - Gao, Y. AU - Sturgeon, R.E. AU - Mester, Zoltán AU - Hou, X. AU - Yang, L. TI - Multivariate optimization of photochemical vapor generation for direct determination of arsenic in seawater by inductively coupled plasma mass spectrometry JF - ANALYTICA CHIMICA ACTA J2 - ANAL CHIM ACTA VL - 901 PY - 2015 SP - 34 EP - 40 PG - 7 SN - 0003-2670 DO - 10.1016/j.aca.2015.10.020 UR - https://m2.mtmt.hu/api/publication/30393648 ID - 30393648 N1 - National Research Council Canada, Ottawa, ON K1A 0R6, Canada College of Earth Sciences, Chengdu University of Technology Chengdu, Sichuan, 610059, China Key Laboratory of Green Chemistry and oTechnology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China Cited By :12 Export Date: 15 January 2019 CODEN: ACACA Correspondence Address: Yang, L.; National Research Council CanadaCanada; email: lu.yang@nrc-cnrc.gc.ca Chemicals/CAS: arsenic, 7440-38-2 Funding details: China Scholarship Council, CSC, 5044 Funding details: Chengdu University of Technology, CDUT, KYGG2014 Funding details: Department of Science and Technology of Sichuan Province, 2014JY0155 Funding details: National Natural Science Foundation of China, NSFC, 21205007 Funding details: National Natural Science Foundation of China, NSFC, 21128006 Funding text 1: The National Natural Science Foundation of China (Grant No. 21205007 , 21128006 ), the China Scholarship Council (No. 5044 ), the Scientific Research Fund of Science and Technology department of Sichuan province (No. 2014JY0155 ), and the “cultivating program of middle-aged supporting teachers” of Chengdu University of Technology (Grant No. KYGG2014 ) are acknowledged for financial support. The authors declare no competing financial interest. Appendix A Funding Agency and Grant Number: National Natural Science Foundation of China [21205007, 21128006]; China Scholarship Council [5044]; Scientific Research Fund of Science and Technology department of Sichuan province [2014JY0155]; Chengdu University of Technology [KYGG2014] Funding text: The National Natural Science Foundation of China (Grant No. 21205007, 21128006), the China Scholarship Council (No. 5044), the Scientific Research Fund of Science and Technology department of Sichuan province (No. 2014JY0155), and the "cultivating program of middle-aged supporting teachers" of Chengdu University of Technology (Grant No. KYGG2014) are acknowledged for financial support. The authors declare no competing financial interest. AB - Photochemical vapor generation (PVG) sample introduction coupled to inductively coupled plasma mass spectrometry (ICPMS) is described for the determination of As in seawater. A Plackett-Burman design (PBD) and central composite design (CCD) were employed to evaluate the significance of experimental variables relevant to the optimization of PVG-ICPMS detection. The impact of the saline matrix on the suppression of analyte signal was eliminated by use of a mixture of 20% (v/v) formic and 20% acetic acid (v/v) as the photochemical reductants. Optimized conditions yielded equivalent PVG generation efficiencies for As(III), As(V), monomethylarsonic acids (MMAs) and dimethylarsinic acids (DMAs), permitting direct and rapid determination of total arsenic in seawater without any other sample pre-treatment. Quantitation was accomplished using one point gravimetric standard addition along with a spike of 82Se internal standard to compensate for signal drift and fluctuation during analysis. The resulting method detection limit of 3 pg g-1 (3σ) provided a 15-fold improvement over that obtained using direct solution nebulization, and is comparable to that for conventional chemical hydride generation (HG)-ICPMS. Accuracy was demonstrated by analysis of two Certified Reference Materials (NASS-6 and CASS-5 seawater) with satisfying results characterized by precisions of 3.5% and 3.2% RSD for CASS-5 and NASS-6, respectively. © 2015. LA - English DB - MTMT ER - TY - JOUR AU - Vanhaecke, F AU - Galbács, Gábor AU - Boonen, S AU - Moens, L AU - R, Dams TI - Use of the Ar2+ signal as a diagnostic tool in solid sampling electrothermal vaporization inductively coupled plasma mass spectrometry JF - JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY J2 - J ANAL ATOM SPECTROM VL - 10 PY - 1995 IS - 12 SP - 1047 EP - 1052 PG - 6 SN - 0267-9477 DO - 10.1039/ja9951001047 UR - https://m2.mtmt.hu/api/publication/1290550 ID - 1290550 N1 - WoS:hiba:A1995TL90700005 2019-03-01 04:32 cím nem egyezik LA - English DB - MTMT ER -