PMID- 22265466
OWN - NLM
STAT- MEDLINE
DCOM- 20120604
LR  - 20131121
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 88
DP  - 2012 Jan 15
TI  - Arsenic speciation in environmental samples by hydride generation and 
      electrothermal atomic absorption spectrometry.
PG  - 30-42
LID - 10.1016/j.talanta.2011.11.068 [doi]
AB  - For the past few years many studies have been performed to determine arsenic (As) 
      speciation in drinking water, food chain and other environmental samples due to 
      its well-recognized carcinogenic and toxic effects relating to its chemical forms 
      and oxidation states. This review provides an overview of analytical methods, 
      preconcentration and separation techniques, developed up to now, using HGAAS and 
      ETAAS for the determination of inorganic As and organoarsenic species in 
      environmental samples. Specific advantages, disadvantages, selectivity, 
      sensitivity, efficiency, rapidity, detection limit (DL), and some aspects of 
      recent improvements and modifications for different analytical and separation 
      techniques, that can define their application for a particular sample analysis, 
      are highlighted. HG-AAS has high sensitivity, selectivity and low DL using 
      suitable separation techniques; and it is a more suitable, affordable and much 
      less expensive technique than other detectors. The concentrations of HCl and 
      NaBH(4) have a critical effect on the HG response of As species. Use of 
      l-cysteine as pre-reductant is advantageous over KI to obtain the same signal 
      response for different As species under the same, optimum and mild acid 
      concentration, and to reduce the interference of transition metals on the arsine 
      generation. Use of different pretreatment, digestion, separation techniques and 
      surfactants can determine As species with DL from ngL(-1) to mugL(-1). Out of all 
      the chromatographic techniques coupled with HGAAS/ETAAS, ion-pair reversed-phase 
      chromatography (IP-RP) is the most popular due to its higher separation 
      efficiency, resolution selectivity, simplicity, and ability to separate up to 
      seven As species for both non-ionic and ionic compounds in a signal run using the 
      same column and short time. However, a combination of anion- and cation-exchange 
      chromatography seems the most promising for complete resolution up to eight As 
      species. The ETAAS method using different separation techniques and chemical 
      modifiers can determine As species in seawater with DL of 0.02 mugL(-1), eliminate 
      interferences of transition metals, improve the selectivity of the measurement, 
      and enhance the sensitivity.
CI  - Copyright (c) 2011 Elsevier B.V. All rights reserved.
FAU - Anawar, Hossain Md
AU  - Anawar HM
AD  - School of Animal, Plant and Environmental Sciences, University of the 
      Witwatersrand, Private Bag X3, WITS 2050 Johannesburg, South Africa. 
      anawar4@hotmail.com
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Review
DEP - 20111128
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Air Pollutants)
RN  - 0 (Borohydrides)
RN  - 0 (Drinking Water)
RN  - 0 (Water Pollutants)
RN  - 1C4QK22F9J (Potassium Iodide)
RN  - 87L0B9CPPA (sodium borohydride)
RN  - K848JZ4886 (Cysteine)
RN  - N712M78A8G (Arsenic)
RN  - QTT17582CB (Hydrochloric Acid)
SB  - IM
MH  - Air Pollutants/*analysis
MH  - Arsenic/*analysis
MH  - Borohydrides/chemistry
MH  - Chromatography, Ion Exchange
MH  - Chromatography, Reverse-Phase
MH  - Cysteine/chemistry
MH  - Drinking Water/chemistry
MH  - Environment
MH  - Hydrochloric Acid/chemistry
MH  - Limit of Detection
MH  - Oxidation-Reduction
MH  - Potassium Iodide/chemistry
MH  - Seawater/chemistry
MH  - Spectrophotometry, Atomic/methods
MH  - Water Pollutants/*analysis
EDAT- 2012/01/24 06:00
MHDA- 2012/06/05 06:00
CRDT- 2012/01/24 06:00
PHST- 2011/09/15 00:00 [received]
PHST- 2011/11/22 00:00 [revised]
PHST- 2011/11/23 00:00 [accepted]
PHST- 2012/01/24 06:00 [entrez]
PHST- 2012/01/24 06:00 [pubmed]
PHST- 2012/06/05 06:00 [medline]
AID - S0039-9140(11)01050-2 [pii]
AID - 10.1016/j.talanta.2011.11.068 [doi]
PST - ppublish
SO  - Talanta. 2012 Jan 15;88:30-42. doi: 10.1016/j.talanta.2011.11.068. Epub 2011 Nov 
      28.