Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Sadaji, YAMADA"'
Autor:
Tsutomu Ohno, Tomomi Goto, Sadaji Yamada, Hiroshi Matsumoto, Hisao Oka, Yuko Ito, Yoichiro Ito
Publikováno v:
Journal of Chromatography A. 1187:53-57
Dual counter-current chromatography (dual CCC)-tandem mass spectrometry (MS/MS) was successfully performed with a newly designed spiral column for dual CCC. The small column capacity required for directly coupling with electrospray MS/MS was accompli
Autor:
Yoichiro Ito, Yuko Ito, Tomomi Goto, Sadaji Yamada, Hisamitsu Nagase, Hiroshi Matsumoto, Hisao Oka
Publikováno v:
Journal of Liquid Chromatography & Related Technologies. 29:2651-2661
We developed a new analytical method for analysis of N‐methyl carbamate pesticides in cereals and beans using dual counter‐current chromatography (dual CCC) and liquid chromatography‐electrospray ionization tandem mass spectrometry (ESI LC/MS/M
Autor:
Hisao Oka, Hiroyuki Nakazawa, Hisamitsu Nagase, Hiroshi Matsumoto, Tomomi Goto, Yuko Ito, Sadaji Yamada, Yoichiro Ito, Nobuyuki Takahashi
Publikováno v:
Journal of Chromatography A. 1108:20-25
Dual counter-current chromatography (dual CCC) has been successfully applied to rapid sample preparation for the simultaneous determination of residual carbaryl, fenobucarb and methomyl in vegetable oil and citrus fruit. The citrus fruit samples were
Publikováno v:
Analytica Chimica Acta. 555:225-232
We developed a new analysis method for the nine N -methyl carbamate pesticides in fruits and vegetables using ESI LC/MS/MS with direct sample injection into a short column. After extraction of the pesticides with ethyl acetate from sample, the extrac
Autor:
Sadaji Yamada, Toru Ito, Masukiyo Tsuruta, Hiroshi Matsumoto, Yuko Itakura, Hisao Oka, Yuko Ito, Takashi Maruyama, Naoko Ozeki, Takahiko Miyazawa, Tomoko Hayashi, Eiji Ueno
Publikováno v:
Journal of the Food Hygienic Society of Japan (Shokuhin Eiseigaku Zasshi). 41:347-352
食品中のウコン色素, クチナシ黄色素及びアナトー色素 (水溶性アナトーを含む) の逆相TLC/スキャニングデンシトメトリーによる分析法を検討した. TLCプレートは逆相C18を用い, 展開溶媒
Autor:
Hiroko Odani, Yuko Ito, Toshiyuki Tanaka, Ken-ichi Harada, Sadaji Yamada, Kenji Maeda, Hisao Oka, Mizuo Mizuno, Makoto Suzuki, Eiichiro Atsumi, Tadaaki Kagami, Setsuyo Akahori, Junko Hayakawa, Masanao Suzuki
Publikováno v:
Journal of the Mass Spectrometry Society of Japan. 46:63-68
A reliable identification method for laccaic acids which are the main components in lac dye has been established using ESI LC/MS/MS with a volatile mobile phase containing acetylacetone. Addition of acetylacetone to the mobile phase enables us to sep
Autor:
Junko Hayakawa, Fusao Ushio, Mitsuaki Sano, Isao Saito, Norihisa Kawamura, Harumi Oshima, Sadaji Yamada
Publikováno v:
Eisei kagaku. 43:237-242
A simple and rapid method for the determination of heme iron in foods was investigated. A sample was weighed in a centrifuge tube and the fat in the sample was removed with diethyl ether. The residue was mixed well with 1-2 ml water, and added 10 ml
Publikováno v:
Journal of AOAC INTERNATIONAL. 77:1296-1299
Methyl isothiocyanate (MITC) was extracted from a 5 mL wine sample with 2 mL dichloromethane, and the extract was washed with 5% sodium chloride solution. MITC was determined by gas chromatography with a dual nitrogen-phosphorus detector (NPD) and a
Publikováno v:
Journal of Agricultural and Food Chemistry. 41:1071-1075
Methylation with ethereal diazomethane in THF was applied to detect cochineal color by TLC. A reddish orange spot at R f 0.75 on a silica gel plate developed with chloroform-methanol-water as a solvent was derived from all of the cochineal color prep
Autor:
Norihisa Kawamura, Kazuharu Aoki, Eiichi Mikami, Junko Hayakawa, Megumu Fukaya, Chikahiro Terao, Sadaji Yamada, Yuko Fujii
Publikováno v:
Journal of AOAC INTERNATIONAL. 76:436-441
Ninety-five commercially available items were analyzed for a small-scale survey of organotin compounds (OTCs) in household commodities such as textile products, shoe polish, adhesives, paint, and wax. Neither tributyltin nor triphenyltin species were