Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations
Numerous protocols for dissolved organic carbon (DOC) measurements on natural water are used in the literature. An ISO protocol for the determination of DOC exists since 2018, but it is certified for DOC values ≥ 1 mg L−1, while many publications report DOC values much lower. In addition, this ISO p...
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Elsevier
2024-06-01
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| Series: | MethodsX |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2215016124001171 |
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| author | Delphine Tisserand Damien Daval Laurent Truche Alejandro Fernandez-Martinez Géraldine Sarret Lorenzo Spadini Julien Némery |
| author_facet | Delphine Tisserand Damien Daval Laurent Truche Alejandro Fernandez-Martinez Géraldine Sarret Lorenzo Spadini Julien Némery |
| author_sort | Delphine Tisserand |
| collection | DOAJ |
| description | Numerous protocols for dissolved organic carbon (DOC) measurements on natural water are used in the literature. An ISO protocol for the determination of DOC exists since 2018, but it is certified for DOC values ≥ 1 mg L−1, while many publications report DOC values much lower. In addition, this ISO protocol does not include indications on vials cleaning, filtering material, and type of caps and septa to be used. The purpose of this study was to evaluate protocols for measurements of low DOC concentrations (≤ 1 mg L−1). The effect of the sample container, type of septum, filtration material, nature of acid used for storage, and matrix effects on DOC concentration were evaluated. • The use of glass vials decontaminated at 450 °C or 500 °C for at least 1 h, 0.45 µm hydrophilic polytetrafluoroethylene (PTFE) membranes previously rinsed with 20 mL ultra-pure water and HCl acidification gives the lowest DOC contamination, • Sulfides (ΣH2S), sodium (Na+) or calcium (Ca2+) do not induce high matrix effect for the analysis (≤ 10%), • At low DOC concentrations (≤ 1 mg L−1), the use of pierced PTFE septa with acidified samples induce slight DOC contamination after storage at 4 °C, and dramatic contamination after storage at -18 °C. |
| first_indexed | 2024-04-24T19:48:41Z |
| format | Article |
| id | doaj.art-a06967df1a0f43c3b503fd64dcef90c2 |
| institution | Directory Open Access Journal |
| issn | 2215-0161 |
| language | English |
| last_indexed | 2024-04-24T19:48:41Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | MethodsX |
| spelling | doaj.art-a06967df1a0f43c3b503fd64dcef90c22024-03-25T04:17:49ZengElsevierMethodsX2215-01612024-06-0112102663Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrationsDelphine Tisserand0Damien Daval1Laurent Truche2Alejandro Fernandez-Martinez3Géraldine Sarret4Lorenzo Spadini5Julien Némery6CNRS, IRD, Univ. Gustave Eiffel, ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble 38000, France; Corresponding author.CNRS, IRD, Univ. Gustave Eiffel, ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble 38000, FranceCNRS, IRD, Univ. Gustave Eiffel, ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble 38000, FranceCNRS, IRD, Univ. Gustave Eiffel, ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble 38000, FranceCNRS, IRD, Univ. Gustave Eiffel, ISTerre, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble 38000, FranceUniv. Grenoble Alpes, CNRS, IRD, INRAE, Grenoble INP (Institute of Engineering), IGE, F-38000 Grenoble, FranceUniv. Grenoble Alpes, CNRS, IRD, INRAE, Grenoble INP (Institute of Engineering), IGE, F-38000 Grenoble, FranceNumerous protocols for dissolved organic carbon (DOC) measurements on natural water are used in the literature. An ISO protocol for the determination of DOC exists since 2018, but it is certified for DOC values ≥ 1 mg L−1, while many publications report DOC values much lower. In addition, this ISO protocol does not include indications on vials cleaning, filtering material, and type of caps and septa to be used. The purpose of this study was to evaluate protocols for measurements of low DOC concentrations (≤ 1 mg L−1). The effect of the sample container, type of septum, filtration material, nature of acid used for storage, and matrix effects on DOC concentration were evaluated. • The use of glass vials decontaminated at 450 °C or 500 °C for at least 1 h, 0.45 µm hydrophilic polytetrafluoroethylene (PTFE) membranes previously rinsed with 20 mL ultra-pure water and HCl acidification gives the lowest DOC contamination, • Sulfides (ΣH2S), sodium (Na+) or calcium (Ca2+) do not induce high matrix effect for the analysis (≤ 10%), • At low DOC concentrations (≤ 1 mg L−1), the use of pierced PTFE septa with acidified samples induce slight DOC contamination after storage at 4 °C, and dramatic contamination after storage at -18 °C.http://www.sciencedirect.com/science/article/pii/S2215016124001171Vial typesFiltrationAcidificationStorage conditionsPierced septa |
| spellingShingle | Delphine Tisserand Damien Daval Laurent Truche Alejandro Fernandez-Martinez Géraldine Sarret Lorenzo Spadini Julien Némery Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations MethodsX Vial types Filtration Acidification Storage conditions Pierced septa |
| title | Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations |
| title_full | Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations |
| title_fullStr | Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations |
| title_full_unstemmed | Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations |
| title_short | Recommendations and good practices for dissolved organic carbon (DOC) analyses at low concentrations |
| title_sort | recommendations and good practices for dissolved organic carbon doc analyses at low concentrations |
| topic | Vial types Filtration Acidification Storage conditions Pierced septa |
| url | http://www.sciencedirect.com/science/article/pii/S2215016124001171 |
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