Application of NMR relaxometry for determining the concentration of nanopowder magnetite in aqueous media

被引：11

作者：

Medvedeva, I. V. ^{[1
]}

Zhakov, S. V. ^{[1
]}

Revvo, A. V. ^{[2
]}

Byzov, I. V. ^{[1
]}

Bakhteeva, Yu. A. ^{[1
]}

Uimin, M. A. ^{[1
]}

Yermakov, A. E. ^{[1
]}

Mysik, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] Ural State Min Univ, Ekaterinburg 620144, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2014年 / 115卷 / 08期

关键词：

NMR; transverse relaxation time; nanoparticles; magnetite; water; WATER; SEDIMENTATION; NANOPARTICLES;

D O I：

10.1134/S0031918X14080110

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The use of the effect of a decrease in the transverse relaxation time T (2) of the NMR signal of water protons in the presence of magnetic particles has been suggested for the quantitative estimation of the concentration of magnetite (Fe3O4) nanopowder in water. A calibration dependence of the relaxivity T (2) (-1) on the iron concentration has been obtained for model suspensions of magnetite nanoparticles with sizes of approximately 20 nm in the concentration range of 0.15-70 mg/L. For comparison, the concentration dependences of T (2) (-1) for aqueous solutions of Fe(NO3)(3) center dot 9H(2)O and FeSO4 center dot 7H(2)O and paramagnetic salts Ni(NO3)(2) center dot 9H(2)O, Cr(NO3)(3) center dot 9H(2)O, and CuSO4 center dot 5H(2)O have been studied to show that they correlate with their paramagnetic susceptibilities.

引用

页码：744 / 748

页数：5

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