Two-dimensional oxygen distribution in a surface sediment layer measured using an RGB color ratiometric oxygen planar optode
- Two-dimensional oxygen distribution in a surface sediment layer measured using an RGB color ratiometric oxygen planar optode
- Lee, J.S.; Kim, E.-S.; An, S.-U.; Kim, J.; Kim, J.; Khang, S.-H.; Kang, D.-J.
- KIOST Author(s)
- Lee, Jae Seong(이재성); Kang, Dong Jin(강동진)
- We measured two-dimensional (2-D) oxygen distribution in the surface sediment layer of intertidal sediment using a simple and inexpensive planar oxygen optode, which is based on a color ratiometric image approach. The recorded emission intensity of red color luminophore light significantly changed with oxygen concentration by O2 quenching of platinum(II)octaethylporphyrin (PtOEP). The ratios between the intensity of red and green emissions with oxygen concentration variation demonstrated the Stern-Volmer relationship. The 2-D oxygen distribution image showed microtopographic structure, diffusivity boundary layer and burrow in surface sediment layer. The oxygen penetration depth (OPD) was about 2 mm and the one-dimensional vertical diffusive oxygen uptake (DOU) was 12.6 mmol m-2 d-1 in the undisturbed surface sediment layer. However, those were enhanced near burrow by benthic fauna, and the OPD was two times deeper and DOU was increased by 34%. The simple and inexpensive oxygen planar optode has great application potential in the study of oxygen dynamics with high spatiotemporal resolution, in benthic boundary layers.
- Ocean and Polar Research, v.35, no.3, pp.229 - 237, 2013
- Luminophore; Oxygen planar optode; RGB color ratiometric
- Related Researcher
Chemical Oceanography,Dissolved Gas in seawater,Development of Instruments,화학해양학,해수용존기체,관측장비개발
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