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Hg isotope fractionation in sediment cores
https://repo.qst.go.jp/records/62676
https://repo.qst.go.jp/records/62676cb148e11-6a0e-4708-a1b1-342a8f8e1cf3
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-08-12 | |||||
| タイトル | ||||||
| タイトル | Hg isotope fractionation in sediment cores | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hintelmann, Holger
× Hintelmann, Holger× Foucher, Delphine× Telmer, K× Zheng, Jian× Yamada, Masatoshi× 鄭 建× 山田 正俊 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Analytical advances in the past decade and the recent advent of multicollector inductively coupled plasma mass spectrometry (MC-ICP/MS) have made it possible to measure fractionation of non-traditional elements such as mercury. We measured the isotope fractionation of mercury in different sediment cores to establish historical records. Marine sediment profiles from deep Pacific locations and from remote lakes on Vancouver Island (British Columbia) and the Experimental Lakes Area (Ontario) were investigated. While the Pacific and Ontario cores (going back to approx. 1800) compare well with each other in that older sediments become progressively enriched with lighter Hg isotopes, the much older BC records (dating back to ca.8000 BC) show the opposite trend starting at around 500 AD increasing in the bottom layers. Only a small degree of mass independent fractionation was detected in this study. While most samples contained sufficient mercury for the measurement, some were as low as 5 ng/g and required preconcentration prior to the isotope ratio measurement. Nitric acid/sulfuric acid sediment digests were evaporated to near dryness and re-dissolved in max. 20 % acid. delta-202Hg before and after pre-concentration were statistically not different from each other, demonstrating that this preconcentration process does not fractionate Hg isotopes. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Goldschmidt2008 Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2008-07-18 | |||||
| 日付タイプ | Issued | |||||
