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MEASUREMENT OF NANOPARTICLES IN WATER
Citation:
BOUCHARD, D. MEASUREMENT OF NANOPARTICLES IN WATER. Presented at 80th Annual Water Environment Federation Technical Exhibition and Conference, San Diego, CA, October 13 - 17, 2007.
Description:
Measuring nanoparticles in water differs from traditional dissolved solute measurement in several ways. The most salient difference is that nanoparticles are colloids rather than solutes and therefore are subject to the interparticle interactions (mainly electrostatic and Van der Waals forces) that determine whether a colloid remains dispersed and stable in water, or whether particle aggregation and sedimentation is favored. Subsequently, care needs to be taken from sample collection to instrumental measurement in the lab to ensure that the sample being measured is representative of the water body at the point of collection. The primary concern here is to maintain the sample water chemistry so that the colloidal state of the nanoparticles is held constant.