Accession Number : ADA620552


Title :   Purification and Concentration of Nanoparticles Using Diafiltration: Scientific Operating Procedure Series: SOP-P-1


Descriptive Note : Final rept.


Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB


Personal Author(s) : Miller, Lesley F ; Chappell, Mark A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a620552.pdf


Report Date : Jul 2015


Pagination or Media Count : 24


Abstract : Nanoparticle solutions, especially those synthesized in a laboratory, may contain additional solutes associated with synthesis and storage, such as ionic salts, suspension stabilizers, pH buffers, chelating agents, etc. These contaminants can cause instability in the nanoparticle suspensions and otherwise modify suspension behavior in a way not representative of a pure solution. Thus, it is important to purify the nanoparticle suspensions in a way that removes reactants but maintains the particles dimensions and properties. Diafiltration is a pressure-driven filtration process that has been shown to effectively and efficiently purify nanoparticle suspensions. This report describes the diafiltration method used in our laboratory, for controlling the initial properties of a nanoparticle dispersion. The authors wish to emphasize the importance of utilizing this technique to obtain data about the initial properties of nanoparticle dispersions. It is recommended that the data be obtained prior to endeavoring to understand how different ionic media such as the media relevant to fate and transport experiments impact behavior.


Descriptors :   *FILTRATION , *NANOPARTICLES , *PURIFICATION , *SOLUTIONS(MIXTURES) , CONCENTRATION(COMPOSITION) , ELECTRICAL CONDUCTIVITY , LIGHT SCATTERING , MASS SPECTROSCOPY , NANOTECHNOLOGY , PLATINUM , SYNTHESIS(CHEMISTRY)


Subject Categories : Industrial Chemistry and Chemical Processing
      Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE