PMID- 26828416
OWN - NLM
STAT- MEDLINE
DCOM- 20161024
LR  - 20181202
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 50
IP  - 5
DP  - 2016 Mar 1
TI  - Ultrasensitive Speciation Analysis of Mercury in Rice by Headspace Solid Phase 
      Microextraction Using Porous Carbons and Gas Chromatography-Dielectric Barrier 
      Discharge Optical Emission Spectrometry.
PG  - 2468-76
LID - 10.1021/acs.est.5b04328 [doi]
AB  - Rice consumption is a primary pathway for human methylmercury (MeHg) exposure in 
      inland mercury mining areas of Asia. In addition, the use of iodomethane, a 
      common fumigant that significantly accelerates the methylation of mercury in soil 
      under sunlight, could increase the MeHg exposure from rice. Conventional 
      hyphenated techniques used for mercury speciation analysis are usually too costly 
      for most developing countries. Consequently, there is an increased interest in 
      the development of sensitive and inexpensive methods for the speciation of 
      mercury in rice. In this work, gas chromatography (GC) coupled to dielectric 
      barrier discharge optical emission spectrometry (DBD-OES) was developed for the 
      speciation analysis of mercury in rice. Prior to GC-DBD-OES analysis, mercury 
      species were derivatized to their volatile species with NaBPh4 and 
      preconcentrated by headspace solid phase microextraction using porous carbons. 
      Limits of detection of 0.5 mug kg(-1) (0.16 ng), 0.75 mug kg(-1) (0.24 ng), and 1.0 
      mug kg(-1) (0.34 ng) were obtained for Hg(2+), CH3Hg(+), and CH3CH2Hg(+), 
      respectively, with relative standard deviations (RSDs) better than 5.2% and 6.8% 
      for one fiber or fiber-to-fiber mode, respectively. Recoveries of 90-105% were 
      obtained for the rice samples, demonstrating the applicability of the proposed 
      technique. Owing to the small size, low power, and low gas consumption of DBD-OES 
      as well as efficient extraction of mercury species by porous carbons headspace 
      solid phase micro-extraction, the proposed technique provides several advantages 
      including compactness, cost-effectiveness, and potential to couple with miniature 
      GC to accomplish the field speciation of mercury in rice compared to conventional 
      hyphenated techniques.
FAU - Lin, Yao
AU  - Lin Y
AD  - Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of 
      Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
FAU - Yang, Yuan
AU  - Yang Y
AD  - Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of 
      Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
FAU - Li, Yuxuan
AU  - Li Y
AD  - Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of 
      Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
FAU - Yang, Lu
AU  - Yang L
AD  - National Research Council Canada, Ottawa, Canada K1A 0R6.
FAU - Hou, Xiandeng
AU  - Hou X
AD  - Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of 
      Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
FAU - Feng, Xinbin
AU  - Feng X
AD  - State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, 
      Chinese Academy of Sciences , Guiyang 550081, China.
FAU - Zheng, Chengbin
AU  - Zheng C
AD  - Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of 
      Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160215
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 7440-44-0 (Carbon)
RN  - FXS1BY2PGL (Mercury)
SB  - IM
MH  - Carbon/*chemistry
MH  - Chromatography, Gas/*methods
MH  - Feasibility Studies
MH  - Mercury/*analysis
MH  - Microscopy, Electron, Scanning
MH  - Microwaves
MH  - Oryza/*chemistry
MH  - Porosity
MH  - Solid Phase Microextraction/*methods
MH  - *Spectrum Analysis
EDAT- 2016/02/02 06:00
MHDA- 2016/10/25 06:00
CRDT- 2016/02/02 06:00
PHST- 2016/02/02 06:00 [entrez]
PHST- 2016/02/02 06:00 [pubmed]
PHST- 2016/10/25 06:00 [medline]
AID - 10.1021/acs.est.5b04328 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2016 Mar 1;50(5):2468-76. doi: 10.1021/acs.est.5b04328. Epub 
      2016 Feb 15.