American Physical Society
Results are presented from a search for fractional charges in water from a variety of natural sources. About 30 000 water drops have been measured, comprising 51 μg of water and dissolved materials. No evidence for fractional charge was seen.
Joyce, D. C., Abrams, P. C., Bland, R. W., Johnson, R. T., Lindgren, M. A., Savage, M. H., Scholz, M. H., Young, B. A., & Hodges, C. L. (1983). Search for Fractional Charges in Water. Physical Review Letters, 51(9), 731–734. https://doi.org/10.1103/PhysRevLett.51.731