NF EN ISO 12782-5
Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and soil materials - Part 5 : extraction of humic substances from aqueous samples
ISO 12782-5:2012 specifies a procedure to determine the concentration of humic substances in aqueous samples. These samples may be obtained as such or as eluates from leaching procedures applied to soil or other materials. Other materials also include waste.The content of humic substances can be used as input in geochemical models.
ISO 12782-5:2012 specifies a procedure to determine the concentration of humic substances in aqueous samples. These samples may be obtained as such or as eluates from leaching procedures applied to soil or other materials. Other materials also include waste.The content of humic substances can be used as input in geochemical models.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Principe3
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5 Appareillage3
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6 Réactifs4
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7 Échantillonnage4
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7.1 Échantillon pour laboratoire4
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7.2 Échantillon pour essai4
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7.3 Prise d'essai4
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8 Mode opératoire5
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8.1 Préparation de la résine DAX-85
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8.2 Détermination de la teneur totale en acides humiques (HA), acides fulviques (FA) et carbone organique hydrophile (Hy) dans les échantillons aqueux5
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9 Traitement et conservation des éluats6
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10 Dosage analytique6
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11 Essai à blanc6
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12 Calcul6
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12.1 Facteurs de correction généraux pour les calculs des acides humiques (HA), des acides fulviques (FA), du carbone organique hydrophile (Hy) et du carbone organique neutre hydrophobe (HON) dans les échantillons aqueux6
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12.2 Concentrations des acides humiques (HA), des acides fulviques (FA), du carbone organique hydrophile (Hy) et du carbone organique neutre hydrophobe (HON) totaux dans les échantillons aqueux7
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13 Expression des résultats8
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14 Rapport d'essai8
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15 Caractéristiques de performance8
- Annexe A (informative) Représentation schématique de la procédure de fractionnement9
- Annexe B (informative) Validation de la procédure11
- Annexe C (informative) Conditions concernant la centrifugation16
- Bibliographie19
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