An assessment of the variability in performance of wet atmospheric deposition samplers
Water-Resources Investigations Report
87-4125
By: R.C. Graham, J.K. Robertson, and John Obal
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Abstract
The variability in performance of two brands of wet/dry atmospheric deposition samplers were compared for 1 year at a sincle site. A total of nine samplers were used. Samples were collected weekly and analyzed for pH, specific conductance, common chemical constituents, and sample volume. Additionally, data on the duration of each sampler opening were recorded using a microdatalogger. These data disprove the common perception that samplers remain open throughout a precipitation event. The sensitivity of sampler sensors within the range tested did not have a defineable impact on sample collection. The nonnormal distribution within the data set necessitated application of the nonparametric Friedman Test to assess comparability of sample chemical composition and volume between and within sampler brands. Statistically significant differences existed for most comparisons, however the test did not permit quantification of their magnitudes. Differences in analyte concentrations between samplers were small. (USGS)
Suggested Citation
Graham, R., Robertson, J., and Obal, J., 1987, An assessment of the variability in performance of wet atmospheric deposition samplers: U.S. Geological Survey Water-Resources Investigations Report 87-4125, vi, 152 p. :ill., map ;28 cm., https://doi.org/10.3133/wri874125.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | An assessment of the variability in performance of wet atmospheric deposition samplers |
| Series title | Water-Resources Investigations Report |
| Series number | 87-4125 |
| DOI | 10.3133/wri874125 |
| Year Published | 1987 |
| Language | ENGLISH |
| Publisher | The Academy, |
| Description | vi, 152 p. :ill., map ;28 cm. |