PMID- 29674040
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180427
LR  - 20180427
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 184
DP  - 2018 Jul 1
TI  - Speciation analysis of inorganic arsenic by magnetic solid phase extraction 
      on-line with inductively coupled mass spectrometry determination.
PG  - 251-259
LID - S0039-9140(18)30257-1 [pii]
LID - 10.1016/j.talanta.2018.03.019 [doi]
AB  - Arsenic, one of the main environmental pollutants and potent natural poison, is a 
      chemical element that is spread throughout the Earth's crust. It is well known 
      that the toxicity of arsenic is highly dependent on its chemical forms. 
      Generally, the inorganic species are more toxic than its organics forms, and 
      As(III) is 60 times more toxic than As(V). In environmental waters, arsenic 
      exists predominantly in two chemical forms: As(III) and As(V). In view of these 
      facts, fast, sensitive, accurate and simple analytical methods for the speciation 
      of inorganic arsenic in environmental waters are required. In this work, a new 
      magnetic solid phase extraction with a hydride generation system was coupled on 
      line with inductively coupled plasma mass spectrometry (MSPE-HG-ICP-MS). The new 
      system was based on the retention of As(III) and As(V) in two knotted reactors 
      filled with (Fe(3)O(4)) magnetic nanoparticles functionalized with [1,5-bis 
      (2-pyridyl) 3-sulfophenylmethylene] thiocarbonohydrazide (PSTH-MNPs). As(III) and 
      total inorganic As were sequentially eluted in different reduction conditions. 
      The concentration of As(V) was obtained by subtracting As(III) from total As. The 
      system runs in a fully automated way and the method has proved to have a wide 
      linear range and to be precise, sensitive and fast. The detection limits found 
      were 2.7 and 3.2 ng/L for As(III) and total As, respectively; with relative 
      standard deviations (RSDs) of 2.5% and 2.7% and a sample throughput of 
      14.4 h(-1). In order to validate the developed method, several certified 
      reference samples of environmental waters including sea water, were analyzed and 
      the determined values were in good agreement with the certified values. The 
      proposed method was successfully applied to the speciation analysis of inorganic 
      arsenic in well-water and sea water.
CI  - Copyright (c) 2018 Elsevier B.V. All rights reserved.
FAU - Montoro Leal, P
AU  - Montoro Leal P
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain.
FAU - Vereda Alonso, E
AU  - Vereda Alonso E
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain. Electronic address: eivereda@uma.es.
FAU - Lopez Guerrero, M M
AU  - Lopez Guerrero MM
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain. Electronic address: mmlopez@uma.es.
FAU - Cordero, M T Siles
AU  - Cordero MTS
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain.
FAU - Cano Pavon, J M
AU  - Cano Pavon JM
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain.
FAU - Garcia de Torres, A
AU  - Garcia de Torres A
AD  - Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, 
      Campus of Teatinos, 29071 Malaga, Spain.
LA  - eng
PT  - Journal Article
DEP - 20180308
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
OTO - NOTNLM
OT  - Arsenic speciation
OT  - Hydride generation
OT  - ICP-MS
OT  - Magnetic nanoparticles
OT  - Solid phase extraction
EDAT- 2018/04/21 06:00
MHDA- 2018/04/21 06:01
CRDT- 2018/04/21 06:00
PHST- 2017/12/18 00:00 [received]
PHST- 2018/03/05 00:00 [revised]
PHST- 2018/03/07 00:00 [accepted]
PHST- 2018/04/21 06:00 [entrez]
PHST- 2018/04/21 06:00 [pubmed]
PHST- 2018/04/21 06:01 [medline]
AID - S0039-9140(18)30257-1 [pii]
AID - 10.1016/j.talanta.2018.03.019 [doi]
PST - ppublish
SO  - Talanta. 2018 Jul 1;184:251-259. doi: 10.1016/j.talanta.2018.03.019. Epub 2018 
      Mar 8.