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Partially overlapping sequential window acquisition of all theoretical mass spectra: A methodology to improve the spectra quality of veterinary drugs present at low concentrations in highly complex biological matrices

机译：部分重叠的顺序窗口获取所有理论质谱：一种提高在高度复杂的生物基质中以低浓度存在的兽药光谱质量的方法

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Rationale >Residues of veterinary drugs in food matrices have to be detected, identified and confirmed at low concentrations. Data‐independent acquisition (DIA) methods such as the sequential window acquisition of all theoretical spectra (SWATH) permit the extraction of relatively clean spectra out of complex matrices. Such spectra can be significantly improved by using a modified SWATH algorithm which provides several times narrower mass isolation windows without affecting the cycle time. </section> <section xml:id="rcm8638-sec-0002" numbered="no"> <title type="main">Methods >A quadrupole‐time‐of‐flight mass spectrometer was operated in a partially overlapping SWATH mode. Unlike in conventional SWATH, acquisition sequences are not identically repeated, but each sequence is initiated with a mass intercept (mass shift). Pearson correlation is used to assign HRMS‐resolved product ions to the precursor mass of interest. Trace analytes (veterinary drugs) in a complex matrix extract (bovine liver) were investigated. </section> <section xml:id="rcm8638-sec-0003" numbered="no"> <title type="main">Results >Utilizing identical cycle times, the partially overlapping SWATH mode produced for the investigated small molecules a significantly higher selectivity than the conventional SWATH acquisition mode. The acquisition strategy enables long ion accumulation times and therefore the required high sensitivity of detection. The study investigates the quality of the obtained product ion spectra and compares it with that in conventional acquisition modes. </section> <section xml:id="rcm8638-sec-0004" numbered="no"> <title type="main">Conclusions >The modified SWATH mode permits high duty cycles in combination with narrow virtual mass windows. The technique is a further step toward harvesting a HRMS product ion spectrum out of a data‐independent acquisition which moves closer towards the quality of a dedicated precursor unit isolation product ion spectrum. </section> </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <第XML：ID =“RCM8638-SEC-0001”编号=“否” <标题类型=“main”>基本原理</ title> 在低浓度下，必须检测到食物基质中的兽医药物的残留物。独立于数据的获取（DIA）方法，例如所有理论光谱（SWATH）的顺序窗口获取允许从复杂的基质中提取相对清洁的光谱。通过使用修改的频道算法，可以显着提高这种光谱，该速率提供了多次较窄的质量隔离窗口而不影响循环时间。</ p> </部分> <第XML：ID =“RCM8638-SEC-0002”编号=“否”> <标题类型=“main”>方法</ title> >在部分重叠的条形模式下操作四极轴 - 飞行时间质谱仪。与常规条款不同，没有相同地重复采集序列，但是通过质量截距（质量偏移）启动每个序列。 Pearson相关性用于将HRMS解析的产品离子分配给感兴趣的前体质量。研究了复杂基质提取物（牛肝）中的痕量分析物（兽医药物）。</ p> </部分> <第XML：ID =“RCM8638-SEC-0003”编号=“否”> <标题类型=“main”>结果</ title> >利用相同的循环时间，为研究的小分子产生的部分重叠的血管模式明显较高的选择性比传统的SWATH采集模式更高。采集策略使远离离子累积次数，因此检测所需的高灵敏度。该研究研究了所得产物离子光谱的质量，并将其与常规采集模式进行比较。</ p> </部分> <第XML：ID =“RCM8638-SEC-0004”编号=“否”> <标题类型=“main”>结论</ title> >修改的条形模式允许高占空比与窄虚拟质量窗口组合。该技术是朝着收集HRMS产物离子光谱的另一个步骤，从独立于数据的获取，该获取朝向专用前体单元隔离产品离子谱的质量移动。</ p> </部分> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-26627/'>《Rapid Communications in Mass Spectrometry: RCM》</a> <b style="margin: 0 2px;">|</b><span>2020年第7期</span><b style="margin: 0 2px;">|</b><span>共14页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kaufmann Anton&option=202" target="_blank" rel="nofollow">Kaufmann Anton;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Maden Kathryn&option=202" target="_blank" rel="nofollow">Maden Kathryn;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Walker Stephan&option=202" target="_blank" rel="nofollow">Walker Stephan;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Official Food Control AuthorityFehrenstrasse 15 8032 Zürich Switzerland;</p> <p>Official Food Control AuthorityFehrenstrasse 15 8032 Zürich Switzerland;</p> <p>Official Food Control AuthorityFehrenstrasse 15 8032 Zürich Switzerland;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1187.html" title="分析化学">分析化学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> </p> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704024019899.html">Partially overlapping sequential window acquisition of all theoretical mass spectra: A methodology to improve the spectra quality 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