title: Evaluation of salinity effect on quantitative analysis of aquatic humic substances using nonionic DAX-8 resin.
abstract: A nonionic macroporous resin, Amberlite(®) XAD-8, or its substitute, Supelite™ DAX-8, is used when isolating or quantifying aquatic humic substances (AHS). However, the effect of salinity on the adsorption behavior of AHS onto the resin is yet to be confirmed, rendering the possibility of salinity-induced changes in the values of quantified amounts or characteristics of AHS obtained from a salty system. To verify the results of quantification and isolation of AHS using the resin in different salinity systems, the effect of salinity on such quantitative analyses of AHS has been examined. It has been concluded that the salinity effect is in general trivial and will not hinder comparison of results regardless of sample solution salinity.
authors.affiliation: Graduate School of Agricultural Science, Kobe University, 1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.
authors.forename: Morimaru
authors.initials: M
authors.lastname: Kida
authors.affiliation: River Basin Research Center, Gifu University, 1-1 Yanagito, Gifu, 501-1193, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ohtsuka
authors.affiliation: Graduate School of Agricultural Science, Kobe University, 1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Kato
authors.affiliation: Graduate School of Agricultural Science, Kobe University, 1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Graduate School of Agricultural Science, Kobe University, 1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan. Electronic address: fujitake@kobe-u.ac.jp.
authors.forename: Nobuhide
authors.initials: N
authors.lastname: Fujitake
mesh_terms: D000327:Adsorption; D006812:Humic Substances / Q000032:analysis*; D012117:Resins, Synthetic / Q000737:chemistry*; D054712:Salinity; D018508:Water Purification
chemical_list: D006812:Humic Substances; D012117:Resins, Synthetic
keywords: Aggregation; Artificial sea water (ASW); Dissolved organic matter (DOM); Hydrophobic interaction; Non-ionic macroporous resin; Quantification