PMID- 18656657
OWN - NLM
STAT- MEDLINE
DCOM- 20081118
LR  - 20181201
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 76
IP  - 4
DP  - 2008 Aug 15
TI  - On-line separation and preconcentration of inorganic arsenic and selenium species 
      in natural water samples with CTAB-modified alkyl silica microcolumn and 
      determination by inductively coupled plasma-optical emission spectrometry.
PG  - 772-9
LID - 10.1016/j.talanta.2008.04.031 [doi]
AB  - A new, simple, and selective method has been presented for the separation and 
      preconcentration of inorganic arsenic (As(III)/As(V)) and selenium 
      (Se(IV)/Se(VI)) species by a microcolumn on-line coupled with inductively coupled 
      plasma-optical emission spectrometry (ICP-OES). Trace amounts of As(V) and Se(VI) 
      species were separated and preconcentrated from total As and Se at desired pH 
      values by a conical microcolumn packed with cetyltrimethylammonium bromide 
      (CTAB)-modified alkyl silica sorbent in the absence of chelating reagent. The 
      species adsorbed by CTAB-modified alkyl silica sorbent were quantitatively 
      desorbed with 0.10 ml of 1.0 mol l(-1) HNO(3). Total inorganic arsenic and 
      selenium were similarly extracted after oxidation of As(III) and Se(IV) to As(V) 
      and Se(VI) with KMnO(4) (50.0 micromol l(-1)). The assay of As(III) and Se(IV) 
      were based on subtracting As(V) and Se(VI) from total As and total Se, 
      respectively. All parameters affecting the separation/preconcentration of As(V) 
      and Se(VI) including pH, sample flow rate and volume, eluent solution and volume 
      have been studied. With a sample volume of 3.0 ml, the sample throughput was 
      24h(-1) and the enrichment factors for As(V) and Se(VI) were 26.7 and 27.6, 
      respectively. The limits of detection (LODs) were 0.15 microg l(-1) for As(V) and 
      0.10 microg l(-1) for Se(VI). The relative standard deviations (RSDs) for nine 
      replicate determinations at 5.0 microg l(-1) level of As(V) and Se(VI) were 4.0% 
      and 3.6%, respectively. The calibration graphs of the method for As(V) and Se(VI) 
      were linear in the range of 0.5-1000.0 microg l(-1) with a correlation 
      coefficient of 0.9936 and 0.9992, respectively. The developed method was 
      successfully applied to the speciation analysis of inorganic arsenic and selenium 
      in natural water samples with satisfactory results.
FAU - Xiong, Chaomei
AU  - Xiong C
AD  - Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
FAU - He, Man
AU  - He M
FAU - Hu, Bin
AU  - Hu B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080422
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Cetrimonium Compounds)
RN  - 0 (Inorganic Chemicals)
RN  - 0 (Surface-Active Agents)
RN  - 00OT1QX5U4 (Potassium Permanganate)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - H6241UJ22B (Selenium)
RN  - N712M78A8G (Arsenic)
RN  - Z7FF1XKL7A (Cetrimonium)
SB  - IM
MH  - Adsorption
MH  - Arsenic/*analysis
MH  - Calibration
MH  - Cetrimonium
MH  - Cetrimonium Compounds/analysis/*chemistry
MH  - Chemistry Techniques, Analytical/*methods
MH  - Hydrogen-Ion Concentration
MH  - Inorganic Chemicals/chemistry
MH  - Models, Chemical
MH  - Optics and Photonics
MH  - Potassium Permanganate/chemistry
MH  - Reproducibility of Results
MH  - Selenium/*analysis
MH  - Silicon Dioxide/chemistry
MH  - Spectrophotometry/*methods
MH  - Surface-Active Agents/analysis/*chemistry
EDAT- 2008/07/29 09:00
MHDA- 2008/11/19 09:00
CRDT- 2008/07/29 09:00
PHST- 2008/01/04 00:00 [received]
PHST- 2008/04/10 00:00 [revised]
PHST- 2008/04/12 00:00 [accepted]
PHST- 2008/07/29 09:00 [pubmed]
PHST- 2008/11/19 09:00 [medline]
PHST- 2008/07/29 09:00 [entrez]
AID - S0039-9140(08)00283-X [pii]
AID - 10.1016/j.talanta.2008.04.031 [doi]
PST - ppublish
SO  - Talanta. 2008 Aug 15;76(4):772-9. doi: 10.1016/j.talanta.2008.04.031. Epub 2008 
      Apr 22.