| 基于便携式GC-MS直接进样的消耗臭氧层物质(ODS)现场监测技术的实现及区域协同应用实践 |
| The Implementation of On-Site Ozone-Depleting Substances Monitoring Technology via Portable GC-MS Direct Sample Injection and Its Regional Collaborative Application Practice |
| 投稿时间：2025-10-05 修订日期：2025-10-29 |
| DOI：10.19316/j.issn.1002-6002.2025.S1.11 |
| 中文关键词: 便携式GC-MS 消耗臭氧层物质(ODS) 直接进样 溴甲烷 区域协同 |
| 英文关键词:portable GC-MS ozone-depleting substances (ODS) direct injection methyl bromide regional collaboration |
| 基金项目: |
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| 通讯作者:刘延锋* 山东省潍坊生态环境监测中心, 山东 潍坊 261000 |
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| 中文摘要: |
| 结合《关于消耗臭氧层物质的蒙特利尔议定书》履约需求及《消耗臭氧层物质管理条例》(2023年修订)有关要求,优化了便携气相色谱-质谱仪(GC-MS)进样方式,即拆除顶空模块、适配采样接口并加装200 μL定量环,采用直接进样方式进行检测。改进后仪器重18 kg(减重28%),可单人便携操作。硬质聚氨酯泡沫、组合聚醚样品检测结果显示:直接进样法与顶空法的定性匹配率为100%;相比顶空法,直接进样法总离子流色谱图(TIC)峰面积更优,单样品分析耗时从30 min缩至12 min(效率提升60%)。溴甲烷检测结果显示,基于改进后仪器的直接进样法与传统方法的定性匹配率为100%,新方法填补了国内现场监测技术空白。在山东-河北跨区域监测实践中,该技术体系使案件响应时间缩短了50%,数据互认率达100%,助力了对331家涉消耗臭氧层物质(ODS)企业的检查及对3起案件的查处,提高了ODS筛查效率,为跨区域协同执法提供了可复制范式。 |
| 英文摘要: |
| In response to the compliance requirements of the Montreal Protocol on Substances that Deplete the Ozone Layer and the relevant stipulations of the Regulations on the Management of Ozone-Depleting Substances (2023 Revision),the injection method of portable GC-MS was optimized.This involved removing the headspace module,adapting the sampling interfaces,and adding a 200 μL quantitative loop to enable direct injection for detection.The improved instrument weighs 18 kg (a 28% reduction in weight) and can be operated portably by a single-person.Tests results on rigid polyurethane foam and polyol blend samples showed a 100% qualitative match rate between the direct injection method and the headspace method.Compared to the headspace method,the direct injection method produced superior total ion chromatogram (TIC) peak areas and reduced the shortens single-sample analysis time from 30 min to 12 min (a 60% increase in efficiency).For methyl bromide monitoring,results indicated a 100% qualitative match rate between the direct injection method using the modified instrument and traditional methods,filling the domestic gap in on-site monitoring.In Shandong-Hebei cross-regional practice,this technical system reduced case response time by 50% and achieved a 100% data mutual recognition rate.It facilitated inspections of 331 ODS-related enterprises and the investigation of 3 related cases,thereby improving ODS screening efficiency and providing a replicable model for cross-regional collaborative law enforcement. |
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