Motoo Ito, Y. Takano, Y. Kebukawa, T. Ohigashi, M. Matsuoka, K. Kiryu, M. Uesugi, Tomoki Nakamura, H. Yuzawa, Keita Yamada, H. Naraoka, T. Yada, M. Abe, M. Hayakawa, T. Saiki, S. Tachibana, Hayabusa II Project Team
1Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), B200 Monobe, Nankoku, Kochi 783-8502, Japan 2Biogeochemistry Research Center (BGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima, Yokosuka 237-0061, Japan 3Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan 4UVSOR Synchrotron Facility, Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585, Japan 5Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan 6Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan 7Department of Earth Science, Graduate School of Science, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan 8Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology (TIT), Yokohama 226-8502, Japan 9Department of Earth and Planetary Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan 10UTokyo Organization for Planetary and Space Science (UTOPS), University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
{"title":"Assessing the debris generated by the small carry-on impactor operated from the Hayabusa2 mission","authors":"Motoo Ito, Y. Takano, Y. Kebukawa, T. Ohigashi, M. Matsuoka, K. Kiryu, M. Uesugi, Tomoki Nakamura, H. Yuzawa, Keita Yamada, H. Naraoka, T. Yada, M. Abe, M. Hayakawa, T. Saiki, S. Tachibana, Hayabusa II Project Team","doi":"10.2343/geochemj.2.0632","DOIUrl":"https://doi.org/10.2343/geochemj.2.0632","url":null,"abstract":"1Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), B200 Monobe, Nankoku, Kochi 783-8502, Japan 2Biogeochemistry Research Center (BGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima, Yokosuka 237-0061, Japan 3Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan 4UVSOR Synchrotron Facility, Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585, Japan 5Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-5210, Japan 6Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan 7Department of Earth Science, Graduate School of Science, Tohoku University, Aoba, Sendai, Miyagi 980-8578, Japan 8Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology (TIT), Yokohama 226-8502, Japan 9Department of Earth and Planetary Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan 10UTokyo Organization for Planetary and Space Science (UTOPS), University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72634916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The influence of hypoxia on the distribution of dissolved bioactive trace metals in Mikawa Bay, central Japan","authors":"H. Kimoto, Koshi Yamamoto","doi":"10.2343/geochemj.2.0625","DOIUrl":"https://doi.org/10.2343/geochemj.2.0625","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89752341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
of rock samples (Yonezawa et al., 1999; Sano et al., 1998, 1999, 2001; Miyoshi et al., 2010; Shinjoe et al., 2013). Sano et al. (1998, 1999) reported that relative standard deviations (% RSD) of replicate analyses of standard rocks were better than 5% for the wide range of boron concentrations of 8–160 ppm. After the nuclear power plant accident in 2011, neutron radiation experiments were halted in Japan. Boron determination was attempted in a high background environment in this study. An ICP-MS used for boron determinations was installed in a laboratory where laser ablation ICP mass spectrometry analyses on glass bead samples fused with LiBO4 was conducted with another ICP-MS. The author investigated effective methods to reduce the influence of a high background on boron peaks. Three analytical methods were compared to improve the accuracy of boron determination. When the concentration of an element is measured using a sensitivity method that compares a signal intensity of an element in a sample solution with that in a standard solution, an internal standard element is often doped to the sample solution to correct the influence of the sample-derived matrix. The internal standard element is selected from elements that are not included in the sample solution and which have a similar mass number to that of the element to be analyzed. Finding a suitable internal standard element is difficult when light elements such as Li, Be, and B in silicate rock samples are determined. Gotan et al. Boron determinations of silicate reference rocks by the isotope dilution method in a high-background environment
岩石样本(Yonezawa et al.， 1999;Sano et al.， 1998,1999,2001;Miyoshi et al.， 2010;Shinjoe et al.， 2013)。Sano等人(1998,1999)报告说，在8-160 ppm的硼浓度范围内，对标准岩石的重复分析的相对标准偏差(% RSD)优于5%。2011年核电站事故发生后，日本停止了中子辐射实验。本研究尝试在高本底环境下测定硼。用于硼测定的ICP- ms安装在实验室中，激光烧蚀ICP质谱分析与LiBO4熔融的玻璃珠样品与另一台ICP- ms进行。探讨了降低高本底对硼峰影响的有效方法。对三种分析方法进行了比较，以提高硼的测定精度。当使用比较样品溶液中元素的信号强度与标准溶液中元素的信号强度的灵敏度方法测量一种元素的浓度时，通常在样品溶液中掺杂一种内部标准元素，以纠正样品衍生矩阵的影响。内标准元素从样品溶液中未包含的、与待分析元素具有相似质量数的元素中选择。在测定硅酸盐岩石样品中的Li、Be、B等轻元素时，很难找到合适的内标元素。Gotan等人。用同位素稀释法测定高本底环境中硅酸盐参考岩中的硼
{"title":"Boron determinations of silicate reference rocks by the isotope dilution method in a high-background environment","authors":"S. Nakai","doi":"10.2343/geochemj.2.0614","DOIUrl":"https://doi.org/10.2343/geochemj.2.0614","url":null,"abstract":"of rock samples (Yonezawa et al., 1999; Sano et al., 1998, 1999, 2001; Miyoshi et al., 2010; Shinjoe et al., 2013). Sano et al. (1998, 1999) reported that relative standard deviations (% RSD) of replicate analyses of standard rocks were better than 5% for the wide range of boron concentrations of 8–160 ppm. After the nuclear power plant accident in 2011, neutron radiation experiments were halted in Japan. Boron determination was attempted in a high background environment in this study. An ICP-MS used for boron determinations was installed in a laboratory where laser ablation ICP mass spectrometry analyses on glass bead samples fused with LiBO4 was conducted with another ICP-MS. The author investigated effective methods to reduce the influence of a high background on boron peaks. Three analytical methods were compared to improve the accuracy of boron determination. When the concentration of an element is measured using a sensitivity method that compares a signal intensity of an element in a sample solution with that in a standard solution, an internal standard element is often doped to the sample solution to correct the influence of the sample-derived matrix. The internal standard element is selected from elements that are not included in the sample solution and which have a similar mass number to that of the element to be analyzed. Finding a suitable internal standard element is difficult when light elements such as Li, Be, and B in silicate rock samples are determined. Gotan et al. Boron determinations of silicate reference rocks by the isotope dilution method in a high-background environment","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82489678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sedimentary record and risk assessment of polycyclic aromatic hydrocarbons in the northern Taihu Basin","authors":"T. Sun, Yanhua Wang, Yan Chen, X. Kong, Chun Ye","doi":"10.2343/geochemj.2.0635","DOIUrl":"https://doi.org/10.2343/geochemj.2.0635","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88460068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Katya Reategui, R. Amaro, L. Rodríguez, Carelys Salazar, R. Fernández, Jochen Smuda
{"title":"Sorption and desorption of phenanthrene and fluorene in mangrove forest soils of the Morrocoy National Park, Venezuelan Caribbean","authors":"Katya Reategui, R. Amaro, L. Rodríguez, Carelys Salazar, R. Fernández, Jochen Smuda","doi":"10.2343/geochemj.2.0621","DOIUrl":"https://doi.org/10.2343/geochemj.2.0621","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89335283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
for the mass concentration of PM2.5: 35 μg/m 3 in 24 h or 12 μg/m3 in 1 year in the USA (USEPA, 2013), 25 μg/m3 in 1 year in Europe (EC, 2008), and 35 μg/m3 in 24 h or 15 μg/m3 in 1 year in Japan (Ministry of the Environment, Government of Japan (MOEJ), 2009). Chemical analysis of fine PM can provide information about its health hazard factors and generation mechanisms; this is important to effectively regulate and reduce hazardous fine PM emissions. Generally, PM includes ionic, organic, and metallic element components. Unlike the organic and ionic components, PM’s metallic elements do not change by reaction with gas or decomposition during transportation in the air. Many studies have taken advantage of this by using PM’s metallic elemental composition as a fingerprint of the source (e.g., Sudheer and Rengarajan, 2012). The metallic element analysis quality needs to be validated to guarantee the reliability of the PM source analysis. One Multielement quantification and Pb isotope analysis of the certified reference material ERM-CZ120 for fine particulate matter
{"title":"Multielement quantification and Pb isotope analysis of the certified reference material ERM-CZ120 for fine particulate matter","authors":"Masatoshi Honda","doi":"10.2343/geochemj.2.0642","DOIUrl":"https://doi.org/10.2343/geochemj.2.0642","url":null,"abstract":"for the mass concentration of PM2.5: 35 μg/m 3 in 24 h or 12 μg/m3 in 1 year in the USA (USEPA, 2013), 25 μg/m3 in 1 year in Europe (EC, 2008), and 35 μg/m3 in 24 h or 15 μg/m3 in 1 year in Japan (Ministry of the Environment, Government of Japan (MOEJ), 2009). Chemical analysis of fine PM can provide information about its health hazard factors and generation mechanisms; this is important to effectively regulate and reduce hazardous fine PM emissions. Generally, PM includes ionic, organic, and metallic element components. Unlike the organic and ionic components, PM’s metallic elements do not change by reaction with gas or decomposition during transportation in the air. Many studies have taken advantage of this by using PM’s metallic elemental composition as a fingerprint of the source (e.g., Sudheer and Rengarajan, 2012). The metallic element analysis quality needs to be validated to guarantee the reliability of the PM source analysis. One Multielement quantification and Pb isotope analysis of the certified reference material ERM-CZ120 for fine particulate matter","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84513505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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