PMID- 22381889
OWN - NLM
STAT- MEDLINE
DCOM- 20120507
LR  - 20131121
IS  - 1873-3778 (Electronic)
IS  - 0021-9673 (Linking)
VI  - 1233
DP  - 2012 Apr 13
TI  - Detection and characterization of silver nanoparticles in aqueous matrices using 
      asymmetric-flow field flow fractionation with inductively coupled plasma mass 
      spectrometry.
PG  - 109-15
LID - 10.1016/j.chroma.2012.02.011 [doi]
AB  - Engineered nanomaterials (EN) may be released into the environment as a result of 
      their use in various consumer products. Silver nanoparticles (nAg) are widely 
      used as an antimicrobial agent in personal care and household products, and in 
      textiles. Since there is high potential for nAg to be released into municipal 
      wastewater and then discharged into the aquatic environment, there is a need to 
      develop methods for the analysis of these materials in aqueous matrices. 
      Asymmetric-flow field flow fractionation (AF4) with on-line detection by ultra 
      violet-visible (UV-Vis) spectroscopy or inductively coupled plasma mass 
      spectrometry (ICP-MS) was used to detect and characterize nAg in aqueous 
      matrices. Analysis of a mixture of 20, 40 and 60 nm nAg standards suspended in 
      water resulted in a well resolved fractogram. Retention times of nAg separated by 
      AF4 were correlated with the particle sizes of the standards. The limit of 
      detection (LOD) for analysis of nAg using the on-line AF4/ICP-MS method was 0.80 
      ng mL(-1). Two calibration approaches (i.e., external calibration and standard 
      addition) were used to quantify nAg concentrations, and both methods gave similar 
      results. Using the on-line AF4/ICP-MS analytical method, nano-sized Ag was 
      detected and quantified in untreated wastewater (i.e., influent) collected from a 
      wastewater treatment plant. The concentration and the modal size of nAg in the 
      influent were 1.90 ng mL(-1) and 9.3 nm respectively.
CI  - Copyright (c) 2012 Elsevier B.V. All rights reserved.
FAU - Hoque, Md Ehsanul
AU  - Hoque ME
AD  - Water Quality Centre, Trent University, Peterborough, Ontario K9J 7B8, Canada. 
      ehsanulhoque@trentu.ca
FAU - Khosravi, Kambiz
AU  - Khosravi K
FAU - Newman, Karla
AU  - Newman K
FAU - Metcalfe, Chris D
AU  - Metcalfe CD
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120213
PL  - Netherlands
TA  - J Chromatogr A
JT  - Journal of chromatography. A
JID - 9318488
RN  - 3M4G523W1G (Silver)
SB  - IM
MH  - Calibration
MH  - Fractionation, Field Flow/*methods
MH  - Mass Spectrometry/*methods
MH  - *Metal Nanoparticles
MH  - Particle Size
MH  - Silver/*chemistry
MH  - Spectrophotometry, Ultraviolet
EDAT- 2012/03/03 06:00
MHDA- 2012/05/09 06:00
CRDT- 2012/03/03 06:00
PHST- 2011/10/18 00:00 [received]
PHST- 2012/02/03 00:00 [revised]
PHST- 2012/02/06 00:00 [accepted]
PHST- 2012/03/03 06:00 [entrez]
PHST- 2012/03/03 06:00 [pubmed]
PHST- 2012/05/09 06:00 [medline]
AID - S0021-9673(12)00254-3 [pii]
AID - 10.1016/j.chroma.2012.02.011 [doi]
PST - ppublish
SO  - J Chromatogr A. 2012 Apr 13;1233:109-15. doi: 10.1016/j.chroma.2012.02.011. Epub 
      2012 Feb 13.