TITLE

Measuring multimodal size distributions of aquatic colloids at trace concentrations

AUTHOR(S)
Walther, C.; Cho, H. R.; Fanghänel, Th.
PUB. DATE
December 2004
SOURCE
Applied Physics Letters;12/27/2004, Vol. 85 Issue 26, p6329
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Many applications in research as well as industry require a highly sensitive detection of particulate matter in water or process liquids. We present a technique to measure the distribution of colloid sizes between 20 and 100 nm in situ at ultratrace concentrations. The method is based on laser-induced breakdown detection, which has been applied for trace detection of colloids and determination of the weighted mean size. Using a refined method of data evaluation, we are now able to measure the number density of inorganic colloids in six size classes between 20 and 100 nm simultaneously below ppb concentration.
ACCESSION #
15403248

 

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