著者

唐牛 譲 石橋 之宏 上椙 真之 矢田 達 中藤 亜衣子 熊谷 和也 岡田 達明 安部 正真

出版者

一般社団法人日本地球化学会

雑誌

地球化学 (ISSN:03864073)

巻号頁・発行日

vol.48, no.4, pp.211-220, 2014-12-25 (Released:2015-01-06)

参考文献数

17

被引用文献数

1

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The Extraterrestrial Sample Curation Center of JAXA curates the Hayabusa-returned samples in conditions of minimum terrestrial contaminants, because these samples are very tiny. We evaluated the cleanliness of the handling instruments, the cleanroom environments and the sample storage chamber to improve the cleanliness of particles, organic molecules and metallic elements to a level not to affect the analyses of the Hayabusa-returned samples. In the environment of the clean chamber No. 2 where the samples have been stored, the organic molecule abundance was lower than the detection limit, furthermore, metallic elemental concentrations were the lowest among other evaluated place. A multi-stage ultrasonic cleaning by organic solvents and the ultrapure water have been applied to instruments made of stainless steel and/or aluminum alloy, and additionally, acid-alkali liquids cleaning have been performed for those made of quartz glasses. For the cleanliness of quartz glasses after the cleaning, the organic molecules abundances were blank level, and the metallic element concentrations were 1~100×109atom/cm2/24 h. It was confirmed by optical microscope that no particle of size more than 10 μm was observed on quartz glasses after the cleaning.

著者

矢田 達 熊谷 和也 橘 省吾 安部 正真 岡田 達明 西村 征洋 与賀田 佳澄 吉武 美和 坂本 佳奈子 中藤 亜衣子 古屋 静萌 宮﨑 明子 山本 大貴 林 佑 岩前 絢子 圦本 尚義 Yada Toru Kumagai Kazuya Tachibana Shogo Abe Masanao Okada Tatsuaki Nishimura Masahiro Yogata Kasumi Yoshitake Miwa Sakamoto Kanako Nakato Aiko Furuya Shizuho Miyazaki Akiko Yamamoto Daiki Hayashi Tasuku Iwamae Ayako Yurimoto Hisayoshi

出版者

宇宙航空研究開発機構(JAXA)

雑誌

宇宙航空研究開発機構特別資料 = JAXA Special Publication (ISSN:24332232)

巻号頁・発行日

vol.JAXA-SP-19-005E, pp.1-1209, 2020-01-15

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