Abstract:
:The introduction of portable in situ ultraviolet-visual spectrometers has made possible the collection of water quality parameters at a high frequency in dynamic systems such as tidal marshes. The usefulness of this technology is inhibited by fouling of the instrument's optics. In this study, a spectrometer fitted with manufacturer-recommended compressed air optical cleaning was installed in a brackish marsh to determine if fouling interfered with measurements between bi-weekly servicing. During a 2-wk period, the absorbance measured in air at 220 nm increased from 9 to 549 m, indicating major fouling. An antifouling system was developed that reduced the time of exposure of the optics to stream water and used a pressurized fresh water cleaning. After implementation of the system, the absorbance in air increased to at most 63 m after 2 wk of data collection. The dramatic reduction in fouling will allow quality long-term data to be collected using this technology.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Etheridge JR,Birgand F,Burchell MR,Smith BTdoi
10.2134/jeq2013.02.0049subject
Has Abstractpub_date
2013-11-01 00:00:00pages
1896-901issue
6eissn
0047-2425issn
1537-2537journal_volume
42pub_type
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