Analysis of Five Mushroom Toxins in Blood by UPLC-HRMS
LIU Wen-qiao,1,2, SHI Yan3, XIANG Ping3, YU Feng1, XIE Bing1, DONG Mei1, HA Jing2, MA Chun-ling,1, WEN Di,1
1.Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, Forensic Identification Center of Hebei Medical University, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
2.College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
3.Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
目的建立同时快速检测血液中5种蘑菇毒素(α-鹅膏毒肽、羧基二羟鬼笔毒肽、蝇蕈醇、毒蝇碱和赛洛新)的超高压液相色谱-高分辨质谱联用(ultra-high performance liquid chromatography-high resolution mass spectrometry,UPLC-HRMS)分析方法。方法血液样品经乙腈-水溶液(V乙腈V水=3∶1)提取、PAX粉末净化后,在ACQUITY Premier C18色谱柱上分离,梯度洗脱。采用FullMS-ddMS2/正离子扫描模式对5种蘑菇毒素进行监测,根据一级母离子和二级碎片离子的精确质量数进行定性定量分析。结果5种蘑菇毒素在各自线性范围内线性关系良好,决定系数(R2)≥0.99;检出限0.2~20 ng/mL;定量限0.5~50 ng/mL;低、中、高3个添加水平的回收率89.6%~101.4%,相对标准偏差1.7%~6.7%,准确度90.4%~101.3%,日内精密度0.6%~9.0%,日间精密度1.7%~6.3%,基质效应42.2%~129.8%。结论本研究建立的方法操作简便快捷、回收率高,可同时对生物检材中多种蘑菇毒素进行快速准确的定性筛选和定量分析,为蘑菇中毒案事件的鉴定提供依据。
关键词:法医学
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毒物化学
;
蘑菇毒素
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超高压液相色谱-高分辨质谱
;
血液
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小鼠
Abstract
ObjectiveTo develop a method for the simultaneous and rapid detection of five mushroom toxins (α-amanitin, phallacidin, muscimol, muscarine and psilocin) in blood by ultra-high performance liquid chromatography-high resolution mass spectrometry (UPLC-HRMS).MethodsThe blood samples were precipitated with acetonitrile-water solution(Vacetonitril∶Vwater=3∶1) and PAX powder, then separated on ACQUITY Premier C18 column, eluted gradient. Five kinds of mushroom toxins were monitored by FullMS-ddMS2/positive ion scanning mode, and qualitative and quantitative analysis was conducted according to the accurate mass numbers of primary and secondary fragment ions.ResultsAll the five mushroom toxins had good linearity in their linear range, with a determination coefficient (R2)≥0.99. The detection limit was 0.2-20 ng/mL. The ration limit was 0.5-50 ng/mL. The recoveries of low, medium and high additive levels were 89.6%-101.4%, the relative standard deviation was 1.7%-6.7%, the accuracy was 90.4%-101.3%, the intra-day precision was 0.6%-9.0%, the daytime precision was 1.7%-6.3%, and the matrix effect was 42.2%-129.8%.ConclusionThe method is simple, rapid, high recovery rate, and could be used for rapid and accurate qualitative screening and quantitative analysis of various mushroom toxins in biological samples at the same time, so as to provide basis for the identification of mushroom poisoning events.
Keywords:forensic medicine
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toxicological chemistry
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mushroom toxins
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ultra-high performance liquid chromatography-high resolution mass spectrometry
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blood
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mice
LIU Wen-qiao, SHI Yan, XIANG Ping, YU Feng, XIE Bing, DONG Mei, HA Jing, MA Chun-ling, WEN Di. Analysis of Five Mushroom Toxins in Blood by UPLC-HRMS. Journal of Forensic Medicine[J], 2021, 37(5): 646-652 DOI:10.12116/j.issn.1004-5619.2020.301001
ACQUITY Premier CSH C18色谱柱:柱温 40 ℃,流速200 μL/min,进样量5 μL。流动相为0.1%甲酸水溶液(A)和甲醇(B)。梯度洗脱程序:0~3 min 2%B,3~5 min (2%~50%)B,5~10 min (50%~70%)B,10~12 min (70%~95%)B,12~12.01 min (95%~2%)B,12.01~15 min 2%B。整个分析过程中样品置于4 ℃自动进样器中。
回收率和基质效应:在空白血液样本中加入混合标准溶液,得到低、中、高3个浓度的样品,按1.3节和1.4节方法进行前处理和分析得到添加血液中各分析物的峰面积为A。同时取空白血样,直接按1.3节方法进行处理,然后向获得的提取剂中加入相应浓度的对照品,按1.4节的方法进行分析得到各分析物的峰面积为B。提取回收率=(A/B)×100%,并计算回收率的相对标准偏差(relative standard deviation,RSD)。用流动相配制低、中、高混合标准溶液,直接按1.4节方法进行分析得到各分析物的峰面积为C。基质效应=(B/C)×100%。
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