PMID- 32515191
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20200908
LR  - 20200908
IS  - 1520-6882 (Electronic)
IS  - 0003-2700 (Linking)
VI  - 92
IP  - 14
DP  - 2020 Jul 21
TI  - Growth of Carbonaceous Nanoparticles on Steel Fiber from Candle Flame for the 
      Long-Term Preservation of Ultratrace Mercury by Solid-Phase Microextraction.
PG  - 9583-9590
LID - 10.1021/acs.analchem.0c00755 [doi]
AB  - An extremely simple, cost-effective, and one-step method was developed for the 
      preparation of solid-phase microextraction (SPME) fibers via the in situ 
      synthesis of carbonaceous nanoparticles on the surface of stainless steel fiber 
      from a candle flame. The prepared SPME fiber provided excellent adsorption 
      capability toward Hg(2+) derived with sodium tetraethylborate and was explored 
      for the separation, preconcentration, and long-term preservation of ultratrace 
      mercury in natural water samples. Moreover, the SPME fiber was further utilized 
      for the highly sensitive routine analysis and field analysis of mercury with a 
      commercial atomic fluorescence spectrometer (AFS) and a miniature point discharge 
      optical emission spectrometer (muPD-OES), respectively. Under the optimum 
      conditions, detection limits of 0.0005 mug L(-1) and 0.007 mug L(-1) together with 
      relative standard deviations (RSDs) less than 5.8% were obtained for Hg(2+) by 
      headspace SPME-AFS and SPME-muPD-OES, respectively. The practicality of the 
      prepared SPME fiber was validated via the determination of Hg(2+) in real water 
      samples with satisfactory recoveries (79-115%). Long-term preservation of mercury 
      at parts per trillion level was undertaken at -20  degrees C and the sample loss rates 
      were less than 5% after 9 days of storage, respectively, indicating that the 
      storage performances of mercury provided by the proposed method are much better 
      than that obtained by conventional methods. Notably, the extraction performance 
      of the SPME fiber is not decreased obviously even after more than 100 times of 
      operation. Due to its advantages of high sensitivity, high stability, simple 
      operation, low cost, and low energy consumption, this method provides an avenue 
      for the field analysis and long-term preservation of mercury in the field of 
      environmental analytical chemistry.
FAU - He, Zhao
AU  - He Z
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
FAU - Lin, Yao
AU  - Lin Y
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
FAU - Wang, Yao
AU  - Wang Y
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
FAU - He, Liangbo
AU  - He L
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
FAU - Hou, Xiandeng
AU  - Hou X
AUID- ORCID: 0000-0003-2488-2063
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
AD  - Analytical and Test Center, Sichuan University, Chengdu 610064, Sichuan, China.
FAU - Zheng, Chengbin
AU  - Zheng C
AUID- ORCID: 0000-0002-7496-8335
AD  - Key Laboratory of Green Chemistry and Technology, Ministry of Education, College 
      of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200707
PL  - United States
TA  - Anal Chem
JT  - Analytical chemistry
JID - 0370536
SB  - IM
EDAT- 2020/06/10 06:00
MHDA- 2020/06/10 06:01
CRDT- 2020/06/10 06:00
PHST- 2020/06/10 06:00 [pubmed]
PHST- 2020/06/10 06:01 [medline]
PHST- 2020/06/10 06:00 [entrez]
AID - 10.1021/acs.analchem.0c00755 [doi]
PST - ppublish
SO  - Anal Chem. 2020 Jul 21;92(14):9583-9590. doi: 10.1021/acs.analchem.0c00755. Epub 
      2020 Jul 7.