title: Determination of the source of bioavailable Sr using ⁸⁷Sr/⁸⁶Sr tracers: a case study of hot pepper and rice.
abstract: The geographical origin of agricultural products has been intensively studied, but links between agricultural products and the environments are poorly established. Soils, water (streamwater and groundwater), and plants (hot pepper, Capsicum annuum; and rice, Oryza sativa) were collected from all regions of South Korea and measured Sr isotope ratios ((87)Sr/(86)Sr). Sequential leaching of soil showed that Sr in the exchangeable and carbonate fractions (bioavailable) had a lower (87)Sr/(86)Sr ratio than that in the silicate fraction, consistent with a low (87)Sr/(86)Sr ratio in the plant. Although the bedrock-soil-water-plant system is closely linked, statistical analysis indicated that (87)Sr/(86)Sr ratios of the plant showed the greatest agreement with those of water and the exchangeable fraction of soil. This study is the first report of (87)Sr/(86)Sr isoscapes in South Korea and first demonstrates that the agricultural product is strongly linked with the exchangeable fraction of soil and water.
authors.affiliation: Division of Earth and Environmental Sciences, Korea Basic Science Institute , Chungbuk 363-883, Republic of Korea.
authors.forename: Byeong-Yeol
authors.initials: BY
authors.lastname: Song
authors.forename: Jong-Sik
authors.initials: JS
authors.lastname: Ryu
authors.forename: Hyung Seon
authors.initials: HS
authors.lastname: Shin
authors.forename: Kwang-Sik
authors.initials: KS
authors.lastname: Lee
mesh_terms: D002212:Capsicum / Q000737:chemistry*; D005507:Food Contamination, Radioactive / Q000032:analysis; D012275:Oryza / Q000737:chemistry*; D056910:Republic of Korea; D012989:Soil Pollutants / Q000032:analysis; D013325:Strontium Isotopes / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D012989:Soil Pollutants; D013325:Strontium Isotopes; D014874:Water Pollutants, Chemical
keywords: South Korea; Sr isotopes; bioavailable; isoscapes; plant