著者

山本 大輔 植木 泱 高橋 知行

出版者

一般社団法人 表面技術協会

雑誌

金属表面技術 (ISSN:00260614)

巻号頁・発行日

vol.29, no.5, pp.231-236, 1978-05-01 (Released:2009-10-30)

参考文献数

8

被引用文献数

1

著者

安達 美和 高橋 知行

出版者

日本法科学技術学会

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.12, no.1, pp.45-51, 2007 (Released:2007-06-27)

参考文献数

7

被引用文献数

2 1

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In the case of food adulteration or suicidal swallowing using dishwashing detergents, several extraction methods were evaluated to extract anionic, nonionic and amphoteric surfactants. Six extraction procedures: diatomaceous earth (ChemElut/chloroform or ethyl acetate), ion-pair liquid-liquid extraction (with methylene blue/chloroform), mixed-mode solid-phase extraction (SPEC PLUS DAU, C18 plus cation exchanger), C18-based solid-phase extraction (Sep-Pak Plus C18) and polymer-based reverse phase extraction (Oasis HLB) were tested. Eleven surfactants: fatty acid alkanolamide (AA), alkyl ether sulfate (AES), alkylglycoside (AG), alkylamine oxide (AO), alpha-olefin sulfonate (AOS-C=C), hydroxy-alkane sulfonate (AOS-OH), alkylamide propylbetaine (APB), fatty acid (FAT), alkylhydroxysulfobetaine (HSB), alkylbenzenesulofonate (LAS), and polyoxyethylene alkyl ether (POE), were extracted from spiked water and highest recoveries (91% for AES to 101% for AO) were obtained with Oasis HLB. On the assumption of food adulteration or stomach contents analysis, soy bean paste “miso” soup, yogurt and curry were spiked with dishwashing detergents and extracted using Oasis HLB. Extraction recoveries from these spiked foods were decreased (1% for LAS and FAT from yogurt to 78% for AO from curry) compared to extraction from spiked water. Except extraction of FAT from miso soup, protein precipitation by ethanol prior to Oasis HLB extraction was effective to improve extraction recoveries (67% for AA from yogurt to 101% for AA from miso soup).

著者

安達 美和 高橋 知行

出版者

日本法科学技術学会

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.10, no.2, pp.99-109, 2005 (Released:2007-07-03)

参考文献数

10

被引用文献数

4 3

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High-performance liquid chromatography/mass spectrometry (LC/MS) was applied to the forensic discrimination of dishwashing detergents. Each dishwashing detergent, commercialy available in Japan, consists of anionic, nonionic, amphoteric surfactants or a combination of these surfactants. These surfactants were separated on a reversed-phase C18 column with methanol/10 mM ammonium acetate gradient mobile phase and were identified according to their molecular-related ions and retention times. Sixty-three commercial products were analyzed and 1,928 of all possible 1,953 pairs (ca. 99%) were distinguished without using other analytical methods. All of the indistinguishable products (25 pairs) were variation of products from a same manufacture with different fragrance, and/or concentration, and a product of original equipment manufacturer (OEM). These results indicate that LC/MS is a reliable tool for the forensic discrimination of surfactants in dishwashing detergents.