@article{fdi:010066207,
  title = {{Q}uantitative filter technique measurements of spectral light absorption by aquatic particles using a portable integrating cavity absorption meter ({QFT}-{ICAM})},
  author = {{R}ottgers, {R}. and {D}oxaran, {D}. and {D}upouy, {C}{\'e}cile},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he accurate determination of light absorption coefficients of particles in water, especially in very oligotrophic oceanic areas, is still a challenging task. {C}oncentrating aquatic particles on a glass fiber filter and using the {Q}uantitative {F}ilter {T}echnique ({QFT}) is a common practice. {I}ts routine application is limited by the necessary use of high performance spectrophotometers, distinct problems induced by the strong scattering of the filters and artifacts induced by freezing and storing samples. {M}easurements of the sample inside a large integrating sphere reduce scattering effects and direct field measurements avoid artifacts due to sample preservation. {A} small, portable, {I}ntegrating {C}avity {A}bsorption {M}eter setup ({QFT}-{ICAM}) is presented, that allows rapid measurements of a sample filter. {T}he measurement technique takes into account artifacts due to chlorophyll-a fluorescence. {T}he {QFT}-{ICAM} is shown to be highly comparable to similar measurements in laboratory spectrophotometers, in terms of accuracy, precision, and path length amplification effects. {N}o spectral artifacts were observed when compared to measurement of samples in suspension, whereas freezing and storing of sample filters induced small losses of water-soluble pigments (probably phycoerythrins). {R}emaining problems in determining the particulate absorption coefficient with the {QFT}-{ICAM} are strong sample-to-sample variations of the path length amplification, as well as fluorescence by pigments that is emitted in a different spectral region than that of chlorophyll-a.},
  keywords = {{NOUVELLE} {CALEDONIE} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{O}ptics {E}xpress},
  volume = {24},
  numero = {2},
  pages = {{A}1--{A}20},
  ISSN = {1094-4087},
  year = {2016},
  DOI = {10.1364/oe.24.0000a1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066207},
}