Article(id=1322945369713291853, tenantId=1146029695717560320, journalId=1283840372199657495, issueId=1322945338570584450, articleNumber=null, orderNo=null, doi=10.3724/SP.J.1123.2025.01016, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1737648000000, receivedDateStr=2025-01-24, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793344355275, onlineDateStr=2026-10-30, pubDate=1765123200000, pubDateStr=2025-12-08, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793344355275, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793344355275, creator=13701087609, updateTime=1793344355275, updator=13701087609, issue=Issue{id=1322945338570584450, tenantId=1146029695717560320, journalId=1283840372199657495, year='2025', volume='43', issue='12', pageStart='1287', pageEnd='1403', issueExtLink='null', onlineDate='null', pubDate='1765123200000', pubDateStr='2025-12-08', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793344347851, creator='13701087609', updateTime=1793345143825, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322948677182038279, tenantId=1146029695717560320, journalId=1283840372199657495, issueId=1322945338570584450, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322948677182038280, tenantId=1146029695717560320, journalId=1283840372199657495, issueId=1322945338570584450, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1397, endPage=1403, ext={EN=ArticleExt(id=1322945369939784270, articleId=1322945369713291853, tenantId=1146029695717560320, journalId=1283840372199657495, language=EN, title=Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry, columnId=1284557502633185292, journalTitle=Chinese Journal of Chromatography, columnName=Articles, runingTitle=null, highlight=null, articleAbstract=
Ethylene oxide (EO) and acetaldehyde are key components of volatile organic compounds (VOCs) emissions in the petrochemical industry. The ozone formation potential of acetaldehyde is several orders of magnitude higher than that of EO. Therefore, accurately identifying and measuring these compounds is essential for developing effective ozone control strategies. However, separating EO from acetaldehyde presents a considerable analytical challenge due to their isomeric nature and comparable volatilities. In this study, a novel analytical method based on thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) technology was developed to simultaneously collect, separate, and quantify EO and acetaldehyde. Optimization was performed on the GC column temperature program, thermal desorption temperature, and thermal desorption flow rate to achieve effective separation. Compounds were separated on a TG-624 SiIMS GC column (60 m×0.25 mm×1.4 μm) with a carrier gas flow rate of 1.2 mL/min. To separate EO from acetaldehyde, the GC column temperature was specifically optimized to enhance their differences in desorption rates from the stationary phase. The temperature was initially held at 30 ℃ for 3 min, then ramped at 5 ℃/min to 120 ℃, held for 3 min. Both full scan and selected ion monitoring modes were employed for target detection. During thermal desorption, the thermal desorption temperature was set at 180 ℃, the cold trap temperature was set at -30 ℃ for capturing desorbed targets, and the secondary desorption flow rate was set at 16 mL/min with the corresponding split ratio of 12.3. The method’s performance was evaluated under optimized experimental conditions. Within the range from 1 to 10 ng/tube, the method showed strong linearity with correlation coefficients above 0.99 for EO and acetaldehyde. Method detection limits were determined to be 0.16 ng/tube for EO and 0.21 ng/tube for acetaldehyde. Thermal desorption efficiencies for both targets exceeded 95% with samples spiked at 2 and 10 ng/tube. Recovery efficiencies spiked at 2, 5 and 10 ng/tube ranged from 80.3% to 106.8%, with relative standard deviations ranging from 4.5% to 9.2%. This method was applied to VOCs samples collected from aftertreatment exhaust streams of two petrochemical units, where different concentrations of EO and acetaldehyde were detected. This study thus established a reliable method for the simultaneous collection, identification and quantification of EO and acetaldehyde in petrochemical emission matrices. Furthermore, this method can also be used for monitoring these compounds in diverse emission sources and ambient air, thereby providing essential data to support the management and control of reactive VOCs.
, authors=Yingjie LI
*, authorsList=Yingjie LI, authorCompany=null, correspAuthors=Yingjie LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. , copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322945372447978071, articleId=1322945369713291853, tenantId=1146029695717560320, journalId=1283840372199657495, language=CN, title=热脱附-气相色谱-质谱法测定石化行业废气中环氧乙烷和乙醛, columnId=1284557502792568846, journalTitle=色谱, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
环氧乙烷和乙醛是石化行业排放废气中挥发性有机化合物(VOCs)的重要组分,乙醛对臭氧生成的贡献潜力高于环氧乙烷几个数量级,需对其精准识别和定量。因为环氧乙烷和乙醛是同分异构体且挥发性相近,常规分析方法难以实现两者的有效分离和准确定量。本研究基于热脱附-气相色谱-质谱技术,通过优化气相色谱柱升温程序、热脱附温度和热脱附流速,建立了能够同时收集、高效分离并准确定量环氧乙烷和乙醛的分析方法。在优化的分析条件下,环氧乙烷和乙醛在1~10 ng/管范围内呈现良好的线性关系,相关系数均在0.99以上,方法检出限分别为0.16 ng/管和0.021 ng/管,目标物的热脱附效率大于95%;目标物在2、5和10 ng/管加标水平下的回收率为80.3%~106.8%,相对标准偏差≤9.2%。采用所建立方法对某石化企业生产装置末端排放口废气进行检测,发现废气中同时存在环氧乙烷和乙醛,且两者浓度不同。该方法不仅为污染源环氧乙烷和乙醛监测提供了一种可靠的技术手段,也可用于其他排放源或环境空气中环氧乙烷和乙醛的监测,为活性VOCs 精准管控提供基础数据支持。
, authors=李英杰
*, authorsList=李英杰, authorCompany=null, correspAuthors=李英杰, authorNote=null, correspAuthorsNote=
, copyrightStatement=Copyright © 2025 Editorial office of Chinese Journal of Chromatography
本文是开放获取文章,遵循CC BY 4.0协议
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*, address=Key Laboratory of Formation and Prevention of Urban Air Pollution Complex,Ministry of Ecology and Environment,Shanghai Academy of Environmental Sciences,Shanghai 200233,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322946373854831557, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, authorId=1322946373716419522, language=CN, stringName=李英杰, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
*, address=生态环境部城市大气复合污染成因与防治重点实验室,上海市环境科学研究院,上海 200233, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322946373603173310, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, xref=null, ext=[AuthorCompanyExt(id=1322946373611561919, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, companyId=1322946373603173310, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Key Laboratory of Formation and Prevention of Urban Air Pollution Complex,Ministry of Ecology and Environment,Shanghai Academy of Environmental Sciences,Shanghai 200233,China), AuthorCompanyExt(id=1322946373619950528, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, companyId=1322946373603173310, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=生态环境部城市大气复合污染成因与防治重点实验室,上海市环境科学研究院,上海 200233)])])], keywords=[Keyword(id=1322946374018409414, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, orderNo=1, keyword=thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS)), Keyword(id=1322946374085518279, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, orderNo=2, keyword=volatile organic compounds (VOCs)), Keyword(id=1322946374148432840, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, orderNo=3, keyword=ethylene oxide), Keyword(id=1322946374219736009, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, orderNo=4, keyword=acetaldehyde), Keyword(id=1322946374286844874, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, orderNo=1, keyword=热脱附-气相色谱-质谱), Keyword(id=1322946374345565131, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, orderNo=2, keyword=挥发性有机化合物), Keyword(id=1322946374408479692, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, orderNo=3, keyword=环氧乙烷), Keyword(id=1322946374475588557, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, orderNo=4, keyword=乙醛)], refs=[Reference(id=1322946375826154460, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, doi=null, pmid=null, pmcid=null, year=2024, volume=44, issue=12, pageStart=6513, pageEnd=null, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=Xie X D, Hu J L, Zhang Y H, journalName=China Environmental Science, refType=null, unstructuredReference=
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Molecular structures of (a) ethylene oxide and (b) acetaldehyde, figureFileSmall=yC/Xt6KzFkhIVQPx1GXVmQ==, figureFileBig=6LaTSU+qy7vC6pujYKGEUQ==, tableContent=null), ArticleFig(id=1322946374727246799, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, label=图1, caption=
(a)环氧乙烷和(b)乙醛的分子结构, figureFileSmall=yC/Xt6KzFkhIVQPx1GXVmQ==, figureFileBig=6LaTSU+qy7vC6pujYKGEUQ==, tableContent=null), ArticleFig(id=1322946374811132880, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, label=Fig. 2, caption=
(a) Total ion chromatogram and (b) mass spectrum of ethylene oxide and acetaldehyde based on canister sampling-GC-MS[9]Peak identifications: 1. acetaldehyde; 2. ethylene oxide.
, figureFileSmall=ZV4dwAK4OmjF+U5u5NZ/jw==, figureFileBig=AON14kfOil/1k2qXeAz7EQ==, tableContent=null), ArticleFig(id=1322946374869853137, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, label=图2, caption=
采用罐采样/GC-MS方法[9]时环氧乙烷和乙醛的(a)总离子流色谱图和(b)质谱图, figureFileSmall=ZV4dwAK4OmjF+U5u5NZ/jw==, figureFileBig=AON14kfOil/1k2qXeAz7EQ==, tableContent=null), ArticleFig(id=1322946374945350610, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, label=Fig. 3, caption=
Total ion chromatograms and mass spectra of (a) ethylene oxide, (b) acetaldehyde, and (c) their standard mixture solutions based on TD-GC-MSPeak identifications: 1. acetaldehyde; 2. ethylene oxide.
, figureFileSmall=PGtg5jJoh1hwsLW83Hpw0g==, figureFileBig=2uGyDJDNaAjoafMFFWPORg==, tableContent=null), ArticleFig(id=1322946375025042387, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, label=图3, caption=
采用TD-GC-MS方法时(a)环氧乙烷、(b)乙醛及其(c)混合标准溶液的总离子流色谱图和质谱图, figureFileSmall=PGtg5jJoh1hwsLW83Hpw0g==, figureFileBig=2uGyDJDNaAjoafMFFWPORg==, tableContent=null), ArticleFig(id=1322946375087956948, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, label=Fig. 4, caption=
Peak areas for ethylene oxide and acetaldehyde with different (a) desorption temperatures and (b) secondary desorption flow rates, figureFileSmall=7ji4g9Kqp1UeBONQNNCqJQ==, figureFileBig=ySLsJdWV9KG15BB8BaCoLQ==, tableContent=null), ArticleFig(id=1322946375163454421, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, label=图4, caption=
不同(a)热脱附温度和(b)二次热脱附流速下环氧乙烷和乙醛的色谱峰响应面积, figureFileSmall=7ji4g9Kqp1UeBONQNNCqJQ==, figureFileBig=ySLsJdWV9KG15BB8BaCoLQ==, tableContent=null), ArticleFig(id=1322946375226368982, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=EN, label=Table 1, caption=
Correlation coefficients (r2 ), method detection limits (MDLs), desorption efficiencies (DEs), recoveries (REs) and RSDs of ethylene oxide and acetaldehyde
, figureFileSmall=null, figureFileBig=null, tableContent=
| Compound | r2 | MDL/ (ng/tube) | DEs/% | REs/% | RSDs/% |
|---|
| 2 ng/tube | 10 ng/tube | 2 ng/tube | 5 ng/tube | 10 ng/tube | 2 ng/tube | 5 ng/tube | 10 ng/tube |
|---|
| Ethylene oxide | 0.9977 | 0.16 | 85 | 95 | 82.0‒5.6 | 80.4‒94.2 | 86.3‒97.4 | 9.2 | 4.2 | 4.9 |
| Acetaldehyde | 0.9916 | 0.21 | 100 | 96 | 87.4‒106.9 | 96.9‒103.0 | 81.2‒92.6 | 4.7 | 4.8 | 4.6 |
), ArticleFig(id=1322946375293477847, tenantId=1146029695717560320, journalId=1283840372199657495, articleId=1322945369713291853, language=CN, label=表1, caption=
环氧乙烷和乙醛的相关系数、方法检出限、热脱附效率、回收率和精确度
, figureFileSmall=null, figureFileBig=null, tableContent=
| Compound | r2 | MDL/ (ng/tube) | DEs/% | REs/% | RSDs/% |
|---|
| 2 ng/tube | 10 ng/tube | 2 ng/tube | 5 ng/tube | 10 ng/tube | 2 ng/tube | 5 ng/tube | 10 ng/tube |
|---|
| Ethylene oxide | 0.9977 | 0.16 | 85 | 95 | 82.0‒5.6 | 80.4‒94.2 | 86.3‒97.4 | 9.2 | 4.2 | 4.9 |
| Acetaldehyde | 0.9916 | 0.21 | 100 | 96 | 87.4‒106.9 | 96.9‒103.0 | 81.2‒92.6 | 4.7 | 4.8 | 4.6 |
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