{"title":"GasBench II/连续流同位素比质谱法用于大气CO2稳定同位素分析的简单且具有成本效益的样品制备和储存方法。","authors":"Savio Manaj, Sang-Tae Kim","doi":"10.1002/rcm.9941","DOIUrl":null,"url":null,"abstract":"<div>\n \n <section>\n \n <h3> Rationale</h3>\n \n <p>The stable isotope compositions of atmospheric CO<sub>2</sub> can provide useful insight into various geochemical processes and carbon cycles on Earth, which is critical for understanding of Earth's changing climate. Here, we present a simple and cost-effective analytical method for the collection and measurement of carbon and oxygen isotope compositions of atmospheric CO<sub>2</sub>.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>Air samples of ~150 mL were collected individually or collectively using our simple active air collection system and then extracted on a vacuum purification line to remove noncondensable gases and atmospheric water vapor. The efficiency of removing atmospheric water vapor was tested by using a magnesium perchlorate desiccant trap and a dry ice/ethanol trap. Lastly, a “J-Cut tube sealing/cracking method” was developed to store and transfer purified atmospheric CO<sub>2</sub> to the GasBench II and CF-IRMS system for δ<sup>13</sup>C and δ<sup>18</sup>O measurements.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>The collective active air collection method combined with the full sample air extraction method for a 3-min transfer time or “Full 3m TE” yields the best analytical precision of 0.07‰ (δ<sup>13</sup>C) and 0.04‰ (δ<sup>18</sup>O). Removing atmospheric water vapor from air samples is not necessary for δ<sup>13</sup>C, but essential for δ<sup>18</sup>O measurements. The J-Cut tube sealing/cracking method shows a near 100% effectiveness for the storage and transfer of atmospheric or any CO<sub>2</sub>.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>A simple and cost-effect method was developed for the collection, purification, storage, and isotopic analysis of indoor/outdoor atmospheric CO<sub>2</sub> samples for general users. This method utilizes a popular headspace gas sample preparation system for CF-IRMS and an easy-to-build vacuum purification line without involving complex and high-cost devices for the preparation of atmospheric CO<sub>2</sub>.</p>\n </section>\n </div>","PeriodicalId":225,"journal":{"name":"Rapid Communications in Mass Spectrometry","volume":"39 3","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11625694/pdf/","citationCount":"0","resultStr":"{\"title\":\"A simple and cost-effective sample preparation and storage method for stable isotope analysis of atmospheric CO2 for GasBench II/continuous flow isotope ratio mass spectrometry\",\"authors\":\"Savio Manaj, Sang-Tae Kim\",\"doi\":\"10.1002/rcm.9941\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <section>\\n \\n <h3> Rationale</h3>\\n \\n <p>The stable isotope compositions of atmospheric CO<sub>2</sub> can provide useful insight into various geochemical processes and carbon cycles on Earth, which is critical for understanding of Earth's changing climate. Here, we present a simple and cost-effective analytical method for the collection and measurement of carbon and oxygen isotope compositions of atmospheric CO<sub>2</sub>.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Air samples of ~150 mL were collected individually or collectively using our simple active air collection system and then extracted on a vacuum purification line to remove noncondensable gases and atmospheric water vapor. The efficiency of removing atmospheric water vapor was tested by using a magnesium perchlorate desiccant trap and a dry ice/ethanol trap. Lastly, a “J-Cut tube sealing/cracking method” was developed to store and transfer purified atmospheric CO<sub>2</sub> to the GasBench II and CF-IRMS system for δ<sup>13</sup>C and δ<sup>18</sup>O measurements.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>The collective active air collection method combined with the full sample air extraction method for a 3-min transfer time or “Full 3m TE” yields the best analytical precision of 0.07‰ (δ<sup>13</sup>C) and 0.04‰ (δ<sup>18</sup>O). Removing atmospheric water vapor from air samples is not necessary for δ<sup>13</sup>C, but essential for δ<sup>18</sup>O measurements. The J-Cut tube sealing/cracking method shows a near 100% effectiveness for the storage and transfer of atmospheric or any CO<sub>2</sub>.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusions</h3>\\n \\n <p>A simple and cost-effect method was developed for the collection, purification, storage, and isotopic analysis of indoor/outdoor atmospheric CO<sub>2</sub> samples for general users. This method utilizes a popular headspace gas sample preparation system for CF-IRMS and an easy-to-build vacuum purification line without involving complex and high-cost devices for the preparation of atmospheric CO<sub>2</sub>.</p>\\n </section>\\n </div>\",\"PeriodicalId\":225,\"journal\":{\"name\":\"Rapid Communications in Mass Spectrometry\",\"volume\":\"39 3\",\"pages\":\"\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-12-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11625694/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Rapid Communications in Mass Spectrometry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/rcm.9941\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"BIOCHEMICAL RESEARCH METHODS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rapid Communications in Mass Spectrometry","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/rcm.9941","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
A simple and cost-effective sample preparation and storage method for stable isotope analysis of atmospheric CO2 for GasBench II/continuous flow isotope ratio mass spectrometry
Rationale
The stable isotope compositions of atmospheric CO2 can provide useful insight into various geochemical processes and carbon cycles on Earth, which is critical for understanding of Earth's changing climate. Here, we present a simple and cost-effective analytical method for the collection and measurement of carbon and oxygen isotope compositions of atmospheric CO2.
Methods
Air samples of ~150 mL were collected individually or collectively using our simple active air collection system and then extracted on a vacuum purification line to remove noncondensable gases and atmospheric water vapor. The efficiency of removing atmospheric water vapor was tested by using a magnesium perchlorate desiccant trap and a dry ice/ethanol trap. Lastly, a “J-Cut tube sealing/cracking method” was developed to store and transfer purified atmospheric CO2 to the GasBench II and CF-IRMS system for δ13C and δ18O measurements.
Results
The collective active air collection method combined with the full sample air extraction method for a 3-min transfer time or “Full 3m TE” yields the best analytical precision of 0.07‰ (δ13C) and 0.04‰ (δ18O). Removing atmospheric water vapor from air samples is not necessary for δ13C, but essential for δ18O measurements. The J-Cut tube sealing/cracking method shows a near 100% effectiveness for the storage and transfer of atmospheric or any CO2.
Conclusions
A simple and cost-effect method was developed for the collection, purification, storage, and isotopic analysis of indoor/outdoor atmospheric CO2 samples for general users. This method utilizes a popular headspace gas sample preparation system for CF-IRMS and an easy-to-build vacuum purification line without involving complex and high-cost devices for the preparation of atmospheric CO2.
期刊介绍：
Rapid Communications in Mass Spectrometry is a journal whose aim is the rapid publication of original research results and ideas on all aspects of the science of gas-phase ions; it covers all the associated scientific disciplines. There is no formal limit on paper length ("rapid" is not synonymous with "brief"), but papers should be of a length that is commensurate with the importance and complexity of the results being reported. Contributions may be theoretical or practical in nature; they may deal with methods, techniques and applications, or with the interpretation of results; they may cover any area in science that depends directly on measurements made upon gaseous ions or that is associated with such measurements.
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