Quantification of 2-amino-3-methylimidazo[4, 5-f]quinoline (IQ) and 2-amino-3, 8-dimethylimidazo[4, 5-f]quinoxaline (MeIQx) in beef extracts by liquid chromatography with electrochemical detection (LCEC)
1985; Oxford University Press; Volume: 6; Issue: 8 Linguagem: Inglês
10.1093/carcin/6.8.1195
ISSN1460-2180
AutoresMakoto Takahashi, Keiji Wakabayashi, Minako Nagao, Masatoshi Yamamoto, Toshio Masui, Tadao Goto, Naohide Kinae, Isao Tomita, Takashi Sügimura,
Tópico(s)Plant Pathogens and Resistance
ResumoA simple and sensitive method was developed for quantification of mutagenic/carcinogenic aminoimidazoquinoline and aminoimidazoquinoxaline compounds in heated materials. Samples were partially purified by blue-cotton treatment, 0.1 N HCl-methylene dichloride partition and separation in a SEP-PAK silica cartridge. The recoveries of aminoimidazoquinoline and aminoimidazoquinoxaline compounds at the step of partial purification were estimated by spiking with 14C-labeled compounds. The compounds in partially purified materials were analyzed by liquid chromatography with electrochemical detection using a combination of two columns of octadecyl silane and cation exchange. Bacteriological-grade beef extract was found to contain 41.6 and 58.7 ng/g of 2-amino-3-methylimidazo[4,5-f]quinoline and 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), respectively. MeIQx was also detected at a level of 3.1 ng per g in food-grade beef extract.
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