Approaches to the determination of C60 and C70 fullerene and their mixtures in aqueous and organic solutions. Mikheev, I. V., Bolotnik, T. A., Volkov, D. S., Korobov, M. V., & Proskurnin, M. A. Наносистемы: физика, химия, математика, 7(1):104–110, 2016.
doi  abstract   bibtex   
The solvent-exchange process from toluene was used for preparing aqueous dispersions of C60 and C70 without preconcentration with final concentrations of 180 ± 2 and 62 ± 1 μM, respectively, which exceeds the previously reported maximum concentrations for C60 more than 6-fold; for C70 such an aqueous dispersion is prepared for the first time. The residual quantity of the organic solvent and low-molecular compounds determined by headspace GC-MS was not more than 1 ppb. The procedure for the determination of fullerenes in aqueous dispersions is developed using a total organic carbon analyzer and absorption spectra; LOD, 50 nM, LOQ, 200 nM by TOC. Spectrophotometric determination of fullerenes in their aqueous dispersions was optimized: for C60 at 268 nm: LOD, 0.1 μM, LOQ, 0.3 μM, for C70 at 218 nm: LOD, 0.1 μM, LOQ, 0.3 μM. RSD mixture quantification by Vierordt’s method in the range of 2 – 20 μM does not exceed 0.14 for C60 and 0.09 C70. RSD for toluene fullerene mixtures by Vierordt’s method in the range of 2 – 20 μM does not exceed 0.10 for C60 and 0.06 for C70.
@article{mikheev_approaches_2016,
	title = {Approaches to the determination of {C}60 and {C}70 fullerene and their mixtures in aqueous and organic solutions},
	volume = {7},
	issn = {2305-7971; 2220-8054},
	doi = {10.17586/2220-8054-2016-7-1-104-110},
	abstract = {The solvent-exchange process from toluene was used for preparing aqueous dispersions of C60 and C70 without preconcentration with final concentrations of 180 ± 2 and 62 ± 1 μM, respectively, which exceeds the previously reported maximum concentrations for C60 more than 6-fold; for C70 such an aqueous dispersion is prepared for the first time. The residual quantity of the organic solvent and low-molecular compounds determined by headspace GC-MS was not more than 1 ppb. The procedure for the determination of fullerenes in aqueous dispersions is developed using a total organic carbon analyzer and absorption spectra; LOD, 50 nM, LOQ, 200 nM by TOC. Spectrophotometric determination of fullerenes in their aqueous dispersions was optimized: for C60 at 268 nm: LOD, 0.1 μM, LOQ, 0.3 μM, for C70 at 218 nm: LOD, 0.1 μM, LOQ, 0.3 μM. RSD mixture quantification by Vierordt’s method in the range of 2 – 20 μM does not exceed 0.14 for C60 and 0.09 C70. RSD for toluene fullerene mixtures by Vierordt’s method in the range of 2 – 20 μM does not exceed 0.10 for C60 and 0.06 for C70.},
	language = {english},
	number = {1},
	journal = {Наносистемы: физика, химия, математика},
	author = {Mikheev, I. V. and Bolotnik, T. A. and Volkov, D. S. and Korobov, M. V. and Proskurnin, M. A.},
	year = {2016},
	pages = {104--110}
}
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