Details
| Original language | English |
|---|---|
| Pages (from-to) | 97-104 |
| Number of pages | 8 |
| Journal | Journal of Chromatography A |
| Volume | 1040 |
| Issue number | 1 |
| Publication status | Published - 7 May 2004 |
| Externally published | Yes |
Abstract
The combination of asymmetrical flow field-flow fractionation (AsFlFFF) with the laser-induced breakdown detection (LIBD) is presented as a powerful tool for the determination of colloid size distribution at trace particle concentrations. Detection limits (Dl) of 1, 4, and 20 μg/L have been determined for a mixture of polystyrene reference particles with 20, 50, and 100 nm in size, respectively. This corresponds to injected masses of 1, 4, and 20 pg, which is lower than found in a previous study with the symmetrical FlFFF (SyFlFFF). The improvement is mainly due to the lower colloid background discharged from the AsFlFFF channel. The combined method of AsFlFFF-LIBD is then applied to the analysis of iron oxi/hydroxide colloids being considered as potential carriers for the radionuclide migration from a nuclear waste repository. Our LIBD arrangement is less sensitive for iron colloid detection as compared to reference polystyrene particles which results in a detection limit of ∼240 μg/L FeOOH for the AsFlFFF-LIBD analysis. This is superior to the detection via UV-Vis absorbance and comparable to ICP-MS detection. Size information (mean size 11-18 nm) for different iron oxi/hydroxide colloids supplied by the present method is comparable to that obtained by sequential ultrafiltration and dynamic light scattering. A combined on-line ICP-MS detection is used to gain insight into the colloid-borne main and trace elements.
Keywords
- Colloids, Field-flow fractionation, Flow field-flow fractionation, Iron oxides, Laser-induced breakdown detection
ASJC Scopus subject areas
- Chemistry(all)
- Analytical Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Chemistry(all)
- Organic Chemistry
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In: Journal of Chromatography A, Vol. 1040, No. 1, 07.05.2004, p. 97-104.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laser-induced breakdown detection combined with asymmetrical flow field-flow fractionation
T2 - Application to iron oxi/hydroxide colloid characterization
AU - Bouby, Muriel
AU - Geckeis, Horst
AU - Ngo Manh, Thang
AU - Yun, Jong Il
AU - Dardenne, Kathy
AU - Schäfer, Thorsten
AU - Walther, Clemens
AU - Kim, Jae Il
PY - 2004/5/7
Y1 - 2004/5/7
N2 - The combination of asymmetrical flow field-flow fractionation (AsFlFFF) with the laser-induced breakdown detection (LIBD) is presented as a powerful tool for the determination of colloid size distribution at trace particle concentrations. Detection limits (Dl) of 1, 4, and 20 μg/L have been determined for a mixture of polystyrene reference particles with 20, 50, and 100 nm in size, respectively. This corresponds to injected masses of 1, 4, and 20 pg, which is lower than found in a previous study with the symmetrical FlFFF (SyFlFFF). The improvement is mainly due to the lower colloid background discharged from the AsFlFFF channel. The combined method of AsFlFFF-LIBD is then applied to the analysis of iron oxi/hydroxide colloids being considered as potential carriers for the radionuclide migration from a nuclear waste repository. Our LIBD arrangement is less sensitive for iron colloid detection as compared to reference polystyrene particles which results in a detection limit of ∼240 μg/L FeOOH for the AsFlFFF-LIBD analysis. This is superior to the detection via UV-Vis absorbance and comparable to ICP-MS detection. Size information (mean size 11-18 nm) for different iron oxi/hydroxide colloids supplied by the present method is comparable to that obtained by sequential ultrafiltration and dynamic light scattering. A combined on-line ICP-MS detection is used to gain insight into the colloid-borne main and trace elements.
AB - The combination of asymmetrical flow field-flow fractionation (AsFlFFF) with the laser-induced breakdown detection (LIBD) is presented as a powerful tool for the determination of colloid size distribution at trace particle concentrations. Detection limits (Dl) of 1, 4, and 20 μg/L have been determined for a mixture of polystyrene reference particles with 20, 50, and 100 nm in size, respectively. This corresponds to injected masses of 1, 4, and 20 pg, which is lower than found in a previous study with the symmetrical FlFFF (SyFlFFF). The improvement is mainly due to the lower colloid background discharged from the AsFlFFF channel. The combined method of AsFlFFF-LIBD is then applied to the analysis of iron oxi/hydroxide colloids being considered as potential carriers for the radionuclide migration from a nuclear waste repository. Our LIBD arrangement is less sensitive for iron colloid detection as compared to reference polystyrene particles which results in a detection limit of ∼240 μg/L FeOOH for the AsFlFFF-LIBD analysis. This is superior to the detection via UV-Vis absorbance and comparable to ICP-MS detection. Size information (mean size 11-18 nm) for different iron oxi/hydroxide colloids supplied by the present method is comparable to that obtained by sequential ultrafiltration and dynamic light scattering. A combined on-line ICP-MS detection is used to gain insight into the colloid-borne main and trace elements.
KW - Colloids
KW - Field-flow fractionation
KW - Flow field-flow fractionation
KW - Iron oxides
KW - Laser-induced breakdown detection
UR - http://www.scopus.com/inward/record.url?scp=2442426154&partnerID=8YFLogxK
U2 - 10.1016/j.chroma.2004.03.047
DO - 10.1016/j.chroma.2004.03.047
M3 - Article
C2 - 15248429
AN - SCOPUS:2442426154
VL - 1040
SP - 97
EP - 104
JO - Journal of Chromatography A
JF - Journal of Chromatography A
SN - 0021-9673
IS - 1
ER -