Search Results 1-20 of 6052

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Quantitative Speciation of Insoluble Chlorine in Environmental Solid Samples

Mukai Kota , Fujimori Takashi , Shiota Kenji , Takaoka Masaki , Funakawa Shinya , Takeda Akira , Takahashi Shin

… Here, we focused on Cl in water-insoluble fractions (insoluble Cl) and applied Cl K-edge X-ray absorption spectroscopy in conjunction with combustion ion chromatography. …

ACS Omega 4(4), 6126-6137, 2019-04-30

IR
2

Analysis of trace nitrogen compounds in environmental water and wastewater including high matrix by ion chromatography [in Japanese]

佐藤万由子 , 李卉 , 鈴木隆弘

工業用水 = Journal of industrial water (653), 79-81, 2019-03
3

Recent Advances and Prospects in Research and Development of Ion Chromatography for Water Quality Monitoring(Part 5)Advanced Ion Chromatography of Major Water Pollution Index for Water Quality Evaluation of Biological Nitrification-denitrification Treatment Process and Environmental Waters [in Japanese]

田中一彦

工業用水 = Journal of industrial water (652), 5-31, 2019-01
4

Rapid Purification of Alkali and Alkaline-earth Elements for Isotope Analysis (δ 7Li, δ 26Mg, 87Sr/86Sr, and δ 88Sr) of Rock Samples Using Borate Fusion Followed by Ion Chromatography with a Fraction Collector System

ARAOKA Daisuke , YOSHIMURA Toshihiro

… For the rapid, easy, and safe purification of alkali and alkaline-earth elements from rock samples for stable isotope analysis, we developed a semi-automated, high-throughput procedure using borate fusion and an ion chromatography system equipped with a fraction collector. …

Analytical Sciences 35(7), 751-757, 2019

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5

Fundamental Study of Behaviors of In-Source Collision Induced Dissociation and Shifting the Linear Range of Calibration Curves of Various Drugs and the Metabolites Used for Therapeutic Drug Monitoring

MAEKAWA Masamitsu , TSUKAMOTO Taku , TAKASAKI Shinya , KIKUCHI Masafumi , SATO Yu , OGURA Jiro , HAYAKAWA Yoshihiro , YAMAGUCHI Hiroaki , MANO Nariyasu

… Liquid chromatography tandem mass spectrometry (LC-MS/MS) is a useful analytical method in such cases. … In order to avoid saturation of the detector, in-source collision induced dissociation (CID) was used to reduce the ion inlet. … As a result, all compounds provided a sharp reduction of ion inlet over the threshold ion guide voltage. …

CHROMATOGRAPHY 40(2), 71-78, 2019

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6

Simultaneous quantification of seven constituents from Zaoren Anshen prescription and four endogenic components in rat plasma by UHPLC-TSQ-MS/MS and the application of the correlation study

Li Rong , Wang Lin , Wang Xiao , Zhang Dian , Zhang Yafeng , Li Zhuo , Fang Minfeng

… A highly rapid and sensitive ultra-performance liquid chromatography-tandem triple quadrupole mass spectrometry (UHPLC-TSQ-MS/MS) method was developed for the simultaneous determination of 7 constituents from Zaoren Anshen prescription (ZAP) and 4 endogenic components in rat plasma. … Quantification of the 11 components was performed by multiple reaction monitoring (MRM), and the electrospray ion source polarity was switched between positive and negative modes. …

Chemical and Pharmaceutical Bulletin, 2019

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7

Selective Cytotoxicity of Staphylococcal α-Hemolysin (α-Toxin) against Human Leukocyte Populations

Tsuiji Makoto , Miyashita Masahiro , Seyama Yoshiyuki , Kurihara Masaaki , Tsuji Tsutomu , Shiohara Kazuyuki , Takei Yoshinori , Shinohara Yoshinori , Nemoto Shigeyoshi , Yamaguchi Satoshi , Kanto Masanori , Itoh Saotomo , Oku Teruaki

… by a combination of ammonium sulfate precipitation, ion-exchange chromatography on a CM-cellulose column and HPLC on a Mono S 5/50 column. …

Biological and Pharmaceutical Bulletin 42(6), 982-988, 2019

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8

Characterization and differentiation of positional isomers of fluoro-fentanyl analogs by a combination of instrumental analyses [in Japanese]

Kanamori Tatsuyuki , Iwata Yuko T. , Segawa Hiroki , Yamamuro Tadashi , Kuwayama Kenji , Tsujikawa Kenji , Inoue Hiroyuki

… The isomers of fluoro-butyrylfentanyl, fluoro-isobutyrylfentanyl, and fluoro-methoxyacetylfentanyl, in which the position of fluorine on the N-phenyl ring varies, were synthesized, characterized, and differentiated by infrared (IR) spectroscopy, liquid chromatography/mass spectrometry (LC/MS), and gas chromatography/mass spectrometry (GC/MS). … However, in the GC/MS extracted ion chromatograms, all compounds were completely separated. …

Japanese Journal of Forensic Science and Technology, 2019

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9

Determination of Trace Iodine in Seawater — Use of Ion Chromatography and Capillary Zone Electrophoresis — [in Japanese]

ITO Kazuaki , TAKEDA Kazuhiko , HIROKAWA Takeshi

海水中の無機ヨウ素は，ヨウ化物イオン（I−）とヨウ素酸イオン（IO3−）として存在している．それらのイオンクロマトグラフィー（IC）とキャピラリーゾーン電気泳動法（CZE）による測定を検討した．ICでは低イオン交換容量（0.03 meq. mL …

BUNSEKI KAGAKU 68(4), 227-239, 2019

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10

Determination of Fluorine in Silicon Carbide Powder by Combustion Ion Chromatography [in Japanese]

MINAMI Hideaki , YAMANASHI Masaki , SHIOMI Shohei , MARUOKA Tomoki

燃焼イオンクロマトグラフィーによる炭化ケイ素粉末中のフッ素分析に関して，燃焼炉の燃焼時間・温度，燃焼炉に導入するキャリヤーガス（大気，混合空気，アルゴン及び窒素）の種類，加湿ユニットによるキャリヤーガスの湿潤・乾燥条件などの各処理条件が，フッ素の定量値，炭化ケイ素の質量変化及び結晶構造にどのように影響するかについて検討した．その結果，燃焼温度: 1200℃，燃焼時間: 30分にお …

BUNSEKI KAGAKU 68(4), 265-274, 2019

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11

Determination of Trace Methylphosphonate in Natural Waters by Ion Chromatography [in Japanese]

TSUJI Kazuma , MARUO Masahiro , OBATA Hajime

… By using ion chromatography (IC), we developed a highly sensitive method for the determination of methylphosphonate present in natural water with an arrangement of the chromatographic conditions that fit for trace phosphate ion in P-limited Lake. …

BUNSEKI KAGAKU 68(4), 275-278, 2019

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12

Development of Simultaneous Determination Method for Nitrate, Nitrite, Phosphate, Ammonium and Potassium Ions by Cation Exclusion/Anion Exchange Chromatography and Its Application to the Analysis of Liquid Fertilizer [in Japanese]

KOZAKI Daisuke , TANIHATA Souma , MORI Masanobu , TANAKA Kazuhiko , YAMAMOTO Atsushi

植物の生育に必要なイオン性栄養塩類である無機態窒素（NO3−，NO2−，NH4＋），HPO<sub& …

BUNSEKI KAGAKU 68(4), 253-258, 2019

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13

Ion Chromatography Using a Zirconia Stationary Phase Modified with Ion-exchange Functionality [in Japanese]

MORI Masanobu , MASUNO Tomoe , KANAI Asako , KOZAKI Daisuke

近年，著者らは新たなイオンクロマトグラフィー（IC）用固定相を創出するため，耐薬性及び耐熱性に優れたジルコニア（ZrO2）を固定相に用いたイオン分離の研究を行っている．今回は，ジルコニア充填カラムにリン酸，α-ヒドロキシ酸（クエン酸）及びジアリルアミン─マレイン酸共重合体（DAM）をそれぞれ修飾し，無機イオンの保持挙動を調べた結果を紹 …

BUNSEKI KAGAKU 68(4), 241-251, 2019

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14

Performance Evaluation of Ion Chromatograph with Direct Supply of Ultrapure Water [in Japanese]

KUROKI Yoshifumi , YAMAMOTO Takahisa

分析に用いる超純水は，サンプリング容器，実験室環境，分析者自身などの様々な要因によって汚染され，分析装置に供給する前にすでに水質低下している場合がある．イオンクロマトグラフィー（IC）分析では，インライン分析のためのデバイスが開発され，それに応じた操作方法が提案され，分析精度の向上につながっている．必然的にこの装置への超純水の連続供給や水質の改善などの新しい機能が必要とされていた …

BUNSEKI KAGAKU 68(4), 259-264, 2019

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15

Analysis of Catecholamine and Their Metabolites in Mice Brain by Liquid Chromatography–Mass Spectrometry Using Sulfonated Mixed-mode Copolymer Column

CHUNG Hsuan , TAJIRI Satoshi , HYOGUCHI Mai , KOYANAGI Riho , SHIMURA Akihiro , TAKATA Fuyuko , DOHGU Shinya , MATSUI Toshiro

… In this study, a simultaneous assay for catecholamines and their metabolites in the brain was established using liquid chromatography–mass spectrometry (LC-MS). … When volatile ion-pairing reagents were added to the mobile phase, they improved the retention and detection of catecholamines on the sulfonated mixed-mode column. …

Analytical Sciences 35(4), 433-439, 2019

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16

FUNDAMENTAL STUDY ON NITRITE ION ANALYSIS IN HARDENED MORTAR [in Japanese]

INOUE Masumi , CHOI Heesup , SUDOH Yuhji

本研究では、硬化コンクリート中に含有する亜硝酸イオン量の分析方法を確立することを目的として、モルタル硬化体を用いて基礎的データの収集を行った。測定はJISおよびJCI規準を骨子として、試料の切断および微粉砕方法、温水抽出方法をパラメータとして分析用試料を作製し、イオンクロマトグラフ法により測定した亜硝酸イオン量を比較検討した。その結果、試料の微粉砕過程では、振動ディスクミルを用い …

Cement Science and Concrete Technology 72(1), 144-150, 2019

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17

Determination of Aminomethylphosphonic Acid, Glufosinate and Glyphosate in Environmental Water Using Ion Chromatography with Pulsed Amperometric Detection [in Japanese]

SUZUKI Seiichi , YAMAMOTO Takahisa , KOBAYASHI Yasuyuki , INOUE Yoshinori

陰イオン交換分離─パルスドアンペロメトリック検出法によるアミノメチルホスホン酸（AMPA），グルホシネート（GLUF）及びグリホサート（GLYP）の同時定量法を検討した．測定条件の最適化を行い，最適化した条件下でのAMPA，GLUF及びGLYPの検出下限（S/N＝3）はそれぞれ0.18 μg L−1, 0.43 μg L<sup …

BUNSEKI KAGAKU 68(3), 179-187, 2019

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18

Establishment of Inline Sample Preparation Methods for Ion Analyses [in Japanese]

SUZUKI Seiichi , YAMAMOTO Takahisa , KOBAYASHI Yasuyuki , INOUE Yoshinori

イオンクロマトグラフィー（IC）は，環境水，飲料水，工業用水，工場排水等の中の無機イオンの試験方法として普及しているが，試料中の高濃度夾（きょう）雑成分の妨害により定量精度の確保が困難になることが多い．そのため前処理による夾雑成分の除去や低減が不可欠であるが，測定対象である無機イオンは測定環境中にも存在し，器具等からの溶出もあるため，煩雑な前処理手法を用いる場合には操作中に汚染が …

BUNSEKI KAGAKU 68(3), 163-177, 2019

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19

Universal Detection Methods in Ion Chromatography [in Japanese]

OHIRA Shin-Ichi , TODA Kei

イオンクロマトグラフィーにおける検出では，イオンに対して応答する高感度な溶液導電率法が広く用いられている．溶液導電率法では，当量導電率がイオン種間で異なるため，原則として，測定対象イオンごとの検量線に基づいて定量する必要がある．他の多くの機器分析法においても測定対象物質の標準により校正して定量するが，測定値の精度は標準溶液の安定性，純度，精度に大きく依存する．測定対象物質の標準を …

BUNSEKI KAGAKU 68(3), 153-162, 2019

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20

Simultaneous Determination of Hydrophilic Food Additives in Meat Products by Ion Chromatography-Mass Spectrometry [in Japanese]

LI Hui , SUZUKI Takahiro , MIURA Satoko

… The quantification method of hydrophilic food additives in meat products was confirmed using an ion chromatography coupled with mass spectrometry. … Lactate and acetate, succinate and malate which could not be discerned and were presented as one peak by conductivity detector, were separated by a mass spectrometry detector in the selected ion monitoring mode. …

BUNSEKI KAGAKU 68(3), 207-213, 2019

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