PMID- 24148465
OWN - NLM
STAT- MEDLINE
DCOM- 20140603
LR  - 20131023
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 116
DP  - 2013 Nov 15
TI  - Diazotization-coupling reaction-based selective determination of nitrite in 
      complex samples using shell-isolated nanoparticle-enhanced Raman spectroscopy.
PG  - 712-8
LID - S0039-9140(13)00592-4 [pii]
LID - 10.1016/j.talanta.2013.07.019 [doi]
AB  - A simple, rapid and selective method based on diazotization-coupling reaction for 
      determination of nitrite ion in complex samples using shell-isolated 
      nanoparticle-enhanced Raman spectroscopy (SHINERS) was developed. Based on 
      diazotization-coupling reaction, nitrite was transformed into azo dye, which has 
      strong SHINERS activity. Subsequently the concentration of nitrite ion can be 
      determined indirectly from the SHINERS of azo dye. The SHINERS active substrate 
      was composed of gold nanoparticle as core with an ultrathin silica shell having 
      pinhole on the surface. Various factors that influence reaction and SHINERS 
      intensity were investigated. Under the optimal conditions, the linearity was 
      observed in the range of 0.5-6.0 mg L(-1) with good correlation coefficient 
      (r(2)>0.9793). The relative standard deviations (RSDs) for five replicate 
      measurements were less than 14.5%. The limit of detections of the method (S/N=3) 
      were 0.07, 0.08 and 0.10 mg L(-1) at 1137, 1395 and 1432 cm(-1), respectively, 
      without sample preconcentration. The selectivity of the proposed method was also 
      tested. The performance of SHINERS to determine the concentration of nitrite in 
      food, biological and environmental samples was evaluated. The results indicate 
      that SHINERS shows great potential as a useful analytical tool for trace analysis 
      of nitrite in real samples. This proposed method provides a practical protocol 
      for determination of compounds with weak Raman response, and can be expanded for 
      the indirect detection of iodate ion, phenols and aromatic amines.
CI  - Copyright (c) 2013 Elsevier B.V. All rights reserved.
FAU - Zhang, Kaige
AU  - Zhang K
AD  - School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 
      Guangdong 510275, PR China.
FAU - Hu, Yuling
AU  - Hu Y
FAU - Li, Gongke
AU  - Li G
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130807
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
RN  - 0 (Aniline Compounds)
RN  - 0 (Azo Compounds)
RN  - 0 (Drinking Water)
RN  - 0 (Nitrites)
RN  - 0 (Water Pollutants, Chemical)
RN  - 29757-24-2 (nitroaniline)
RN  - 7440-57-5 (Gold)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - 9N3CBB0BIQ (Diphenylamine)
SB  - IM
MH  - Aniline Compounds/chemistry
MH  - Azo Compounds/*chemistry
MH  - Diphenylamine/chemistry
MH  - Drinking Water/*chemistry
MH  - Fresh Water/*chemistry
MH  - Gold/chemistry
MH  - Humans
MH  - Limit of Detection
MH  - Metal Nanoparticles/*chemistry
MH  - Nitrites/*analysis
MH  - Silicon Dioxide/chemistry
MH  - Spectrum Analysis, Raman
MH  - Water Pollutants, Chemical/*analysis
OTO - NOTNLM
OT  - Diazotization-coupling reaction
OT  - Gold nanoparticles with an ultrathin silica
OT  - Nitrite ion
OT  - Shell-isolated nanoparticle-enhanced Raman spectroscopy
EDAT- 2013/10/24 06:00
MHDA- 2014/06/04 06:00
CRDT- 2013/10/24 06:00
PHST- 2013/04/30 00:00 [received]
PHST- 2013/07/06 00:00 [revised]
PHST- 2013/07/09 00:00 [accepted]
PHST- 2013/10/24 06:00 [entrez]
PHST- 2013/10/24 06:00 [pubmed]
PHST- 2014/06/04 06:00 [medline]
AID - S0039-9140(13)00592-4 [pii]
AID - 10.1016/j.talanta.2013.07.019 [doi]
PST - ppublish
SO  - Talanta. 2013 Nov 15;116:712-8. doi: 10.1016/j.talanta.2013.07.019. Epub 2013 Aug 
      7.