In this study, we established a comprehensive method for simultaneous identification and quantification of tetrodotoxin （TTX） in fresh pufferfish tissues and pufferfish-based products using liquid chromatography/qua...In this study, we established a comprehensive method for simultaneous identification and quantification of tetrodotoxin （TTX） in fresh pufferfish tissues and pufferfish-based products using liquid chromatography/quadrupole-linear ion trap mass spectrometry （LC-QqLIT-MS）. TTX was extracted by 1% acetic acid-methanol, and most of the lipids were then removed by freezing lipid precipitation, followed by purification and concentration using immunoaffinity columns （IACs）. Matrix effects were substantially reduced due to the high specificity of the IACs, and thus, background interference was avoided. Quantitation analysis was therefore performed using an external calibration curve with standards prepared in mobile phase. The method was evaluated by fortifying samples at 1, 10, and 100 ng/g, respectively, and the recoveries ranged from 75.8%--107%, with a relative standard deviation of less than 15%. The TTX calibration curves were linear over the range of 1-1 000 ~tg/L, with a detection limit of 0.3 ng/g and a quantification limit of 1 ng/g. Using this method, samples can be further analyzed using an information- dependent acquisition （IDA） experiment, in the positive mode, from a single liquid chromatography-tandem mass spectrometry injection, which can provide an extra level of confirmation by matching the full product ion spectra acquired for a standard sample with those from an enhanced product ion （EPI） library. The scheduled multiple reaction monitoring method enabled TTX to be screened for, and TTX was positively identified using the IDA and EPI spectra. This method was successfully applied to analyze a total of 206 samples of fresh pufferfish tissues and pufferfish-based products. The results from this study show that the proposed method can be used to quantify and identify TTX in a single run with excellent sensitivity and reproducibility, and is suitable for the analysis of complex matrix pufferfish samples.展开更多
为探寻河鲀研究进展,了解国内外河鲀研究现状及其发展趋势,基于Web of Science(WoS)核心合集数据库和中国知识资源总库(CNKI)河鲀研究文献,通过CiteSpace 5.8.R3软件绘制可视化科学知识图谱进行文献计量分析。共筛选1990—2021年收录的...为探寻河鲀研究进展,了解国内外河鲀研究现状及其发展趋势,基于Web of Science(WoS)核心合集数据库和中国知识资源总库(CNKI)河鲀研究文献,通过CiteSpace 5.8.R3软件绘制可视化科学知识图谱进行文献计量分析。共筛选1990—2021年收录的文献2642篇,其中WoS核心合集数据库1270篇,CNKI数据库1372篇。结果表明:国内外对河鲀的研究数量总体呈上升趋势,研究热点主要有河鲀毒素、人工养殖、食用安全、基因表达等。国外主要科研团队来自日本、美国等高校和科研院所,意大利和法国等国家起到重要的链接作用;国内主要研究机构来自大连海洋大学、上海海洋大学、中国水产科学研究院等高校和科研院所。国内外研究者多为小组研究,各国之间合作紧密,国内组间相互合作较少。随着国内外对河鲀研究工作的开展,其研究热点随之变化,河鲀毒素、生长性能、遗传基因表达研究等是今后持续的研究热点。展开更多
基金Supported by the National Natural Science Foundation of China(No.41106109)the China National Food Safety Standards Development Project(No.ZHENGHE-2015-356)
文摘In this study, we established a comprehensive method for simultaneous identification and quantification of tetrodotoxin （TTX） in fresh pufferfish tissues and pufferfish-based products using liquid chromatography/quadrupole-linear ion trap mass spectrometry （LC-QqLIT-MS）. TTX was extracted by 1% acetic acid-methanol, and most of the lipids were then removed by freezing lipid precipitation, followed by purification and concentration using immunoaffinity columns （IACs）. Matrix effects were substantially reduced due to the high specificity of the IACs, and thus, background interference was avoided. Quantitation analysis was therefore performed using an external calibration curve with standards prepared in mobile phase. The method was evaluated by fortifying samples at 1, 10, and 100 ng/g, respectively, and the recoveries ranged from 75.8%--107%, with a relative standard deviation of less than 15%. The TTX calibration curves were linear over the range of 1-1 000 ~tg/L, with a detection limit of 0.3 ng/g and a quantification limit of 1 ng/g. Using this method, samples can be further analyzed using an information- dependent acquisition （IDA） experiment, in the positive mode, from a single liquid chromatography-tandem mass spectrometry injection, which can provide an extra level of confirmation by matching the full product ion spectra acquired for a standard sample with those from an enhanced product ion （EPI） library. The scheduled multiple reaction monitoring method enabled TTX to be screened for, and TTX was positively identified using the IDA and EPI spectra. This method was successfully applied to analyze a total of 206 samples of fresh pufferfish tissues and pufferfish-based products. The results from this study show that the proposed method can be used to quantify and identify TTX in a single run with excellent sensitivity and reproducibility, and is suitable for the analysis of complex matrix pufferfish samples.
文摘为探寻河鲀研究进展,了解国内外河鲀研究现状及其发展趋势,基于Web of Science(WoS)核心合集数据库和中国知识资源总库(CNKI)河鲀研究文献,通过CiteSpace 5.8.R3软件绘制可视化科学知识图谱进行文献计量分析。共筛选1990—2021年收录的文献2642篇,其中WoS核心合集数据库1270篇,CNKI数据库1372篇。结果表明:国内外对河鲀的研究数量总体呈上升趋势,研究热点主要有河鲀毒素、人工养殖、食用安全、基因表达等。国外主要科研团队来自日本、美国等高校和科研院所,意大利和法国等国家起到重要的链接作用;国内主要研究机构来自大连海洋大学、上海海洋大学、中国水产科学研究院等高校和科研院所。国内外研究者多为小组研究,各国之间合作紧密,国内组间相互合作较少。随着国内外对河鲀研究工作的开展,其研究热点随之变化,河鲀毒素、生长性能、遗传基因表达研究等是今后持续的研究热点。
