The studies on the silica species in regional and seasonal change, and on development of measurement in pure water

区域和季节变化中二氧化硅形态的研究及纯水中测量的发展

• 批准号: 21550073
• 负责人: TAKAHASHI Miho
• 金额: $ 3.16万
• 依托单位: Tokyo University of Marine Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21550073/
• 关键词: シリカ(ケイ酸); 溶存化学種; 海水; 淡水; 質量分析計; シリカ化学種; シリカの飽和量; FAB-MS; ESI-MS; 東京湾; 日本海; 溶存状態; モリブドケイ酸; 直鎖状4量体; 環状4量体; 淡水中のシリカの溶解; 直鎖4量体; 2量体

The silica concentration and species change according to season by the activity of diatom and circulation of seawater. The silica species were observed in seawater of Tokyo and Sagami Bays. Dimer and linear tetramer were consumed by diatom. In spring, dimer and linear tetramer became very low concentration compared with cyclic tetramer. However, in spring of 2003, which was the year of cold summer, dimer and linear tetramer did not become low. And in fall of 2003, the distribution of dimer and linear tetramer was almost same as those in fall of 2002 and 2004. This indicated that the distribution of dimer and linear tetramer in spring showed the hot summer or not.By this measurement of silica species by FAB-MS, it was difficult to detect these species in pure water. The preparation with high concentration of silica in pure water was developed. From this way, the artificial solution could be reproduced just the same as the river water with high concentration of silica. This high concentration silica solution was examined by FAB-MS and ESI-MS, and observed silica species were compared with each other. The silica species were pass the desolvated process by ESI-MS, therefore, detected silica species changed by dehydration.

硅藻的活动和海水的循环使硅藻的浓度和种类随季节变化。在东京湾和相模湾的海水中观察到了二氧化硅物种。二聚体和线状四聚体被硅藻消耗。春季，与环状四聚体相比，二聚体和线状四聚体的浓度变得很低。然而，在2003年春季，也就是夏季寒冷的一年，二聚体和线性四聚体并没有降低。2003年秋季，二聚体和线状四聚体的分布与2002年和2004年秋季基本一致。这说明二聚体和线性四聚体在春季的分布反映了夏季是否炎热。通过FAB-MS对二氧化硅物种的测定，很难在纯净水中检测到这些物种。开发了在纯水中制备高浓度二氧化硅的方法。通过这种方式，人工溶液可以复制成与高浓度二氧化硅的河水一样。对该高浓度二氧化硅溶液进行了FAB-MS和ESI-MS检测，并对观察到的二氧化硅形态进行了比较。通过电喷雾质谱(ESI-MS)对二氧化硅物种进行脱溶处理，从而检测到脱水过程中二氧化硅物种的变化。

项目成果

塩に対するスラグ、とくに鉄とケイ素の溶出挙動の研究

炉渣尤其是铁和硅的抗盐洗脱行为研究

• 发表时间: 2012
• 作者: 平田純一;相本道宏;田中美穂
• 通讯作者: 田中美穂

Chemical speciation of aluminum and chromium in the process of coprecipitation by ESI-MS.

ESI-MS 共沉淀过程中铝和铬的化学形态。

• 发表时间: 2010
• 作者: Tatsuya Urabe;Miho Tanaka
• 通讯作者: Miho Tanaka

ランタノイドの溶存状態:ESI-MSによる溶存状態に関する基礎研究

镧系元素的溶解状态：ESI-MS 溶解状态的基础研究

• 发表时间: 2010
• 作者: 生川智啓;卜部達也;田中美穂
• 通讯作者: 田中美穂

化学種の組み換えの解析に基づいた河口域におけるシリカの溶存状態の解明

基于化学物种重组分析阐明河口二氧化硅的溶解状态

• 发表时间: 2009
• 作者: Miho Tanaka;Kazuya Takahashi;高橋(田中)美穂
• 通讯作者: 高橋(田中)美穂

キャピラリー電気泳動とエレクトロスプレーイオン化質量分析法を組み合わせた溶存イオンの分析手法の開発

毛细管电泳与电喷雾电离质谱相结合的溶解离子分析方法的开发

• 发表时间: 2009
• 作者: 若杉将史;卜部達也;生川智啓;田中美穂
• 通讯作者: 田中美穂