Journal of Mass Spectrometry最新文献

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148126838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148127440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-Performance Liquid Chromatography–Electrospray Ionization–Ion Trap Tandem Mass Spectrometry for Fragmentation of Cyclic Dipeptides: Methodology and Application to the Chemical Profiling of the Fungus Hormonema dematioides","authors":"Min Jae Kim,&nbsp;Xinyun Zhang,&nbsp;Zhao Yang,&nbsp;Xiaofan Fan,&nbsp;Hongjuan Pan,&nbsp;Zhihong Cheng","doi":"10.1002/jms.70055","DOIUrl":"10.1002/jms.70055","url":null,"abstract":"<div>\u0000 \u0000 <p>Cyclic dipeptides (CDPs), distinguished by a 2,5-diketopiperazine core, exhibit a broad spectrum of biological activities. The (un)targeted discovery of CDPs in complex matrices is therefore of considerable interest, and mass spectrometry (MS) offers unrivalled advantages: rapid analysis, high sensitivity, minimal sample consumption, and limited pre-treatment requirements. Yet, confident MS-based identification of CDPs has been hampered by the scarcity of authentic reference standards. To address this deficit, we undertook a systematic investigation of 21 CDPs isolated from the fungus <i>Hormonema dematioides</i> using ultra-performance liquid chromatography–electrospray ionization–linear ion trap multistage MS (UPLC–ESI–LIT-MSⁿ) in positive ion mode. Hierarchical MS² and MS³ experiments afforded reproducible fragmentation pathways that unambiguously delineated the CDP nucleus and the constituent amino acid residues. For the first time, we herein proposed [M + H-17]⁺ and [M + H-56]⁺ as co-diagnostic ions for the 2,5-diketopiperazine scaffold, together with the previously reported [M + H-28]⁺, [M + H-45]⁺, and [M + H-73]⁺ ions. Additionally, in contrast to previous reports, the [M + H-28]⁺ ion consistently appeared as the base peak for the majority of CDPs examined. Amino-acid-specific fragments were found to be strictly dependent on the nature of the incorporated residues. These fragmentation rules were subsequently applied to the untargeted profiling of <i>H. dematioides</i>, enabling the identification or tentative annotation of 30 CDPs through combined UV and MSⁿ (<i>n</i> = 3) data, corroborated wherever possible by authentic standards. Notably, 10 of the CDPs are reported here for the first time from this fungal species.</p>\u0000 </div>","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147574329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148099616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148095324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Method Development for the Analysis of Carbonaceous Chondrites by Laser Desorption/Ionization and Secondary Ion Time-of-Flight Mass Spectrometry","authors":"Edita Rados,&nbsp;Johannes Frank,&nbsp;Ernst Pittenauer","doi":"10.1002/jms.70051","DOIUrl":"10.1002/jms.70051","url":null,"abstract":"<p>This study focuses on the development of a laser desorption/ionization mass spectrometric method for analyzing carbonaceous chondrites, meteorites that may hold clues to the origin of life. Since carbonaceous chondrites are only available in small quantities, we initially designed an artificial meteorite material (the mineral forsterite) doped with an organic material system (the amino acid tryptophan, the sugar 2-deoxy-D-ribose, and the polycyclic aromatic hydrocarbon triphenylene) as meteorite-like material to develop an LDI-MS method. This simulates a simplified artificial meteoritic composition to study the behavior of organic compounds in an inorganic environment. Experiments with meteorite-like material were performed on four different LDI-MS instruments (reflectron TOF-MS and QTOF-MS) with different performance characteristics (e.g., different lasers and laser repetition rates, different ion source pressure) in positive- and negative-ion mode and compared the data with those obtained on a TOF-SIMS instrument. Real meteoritic samples were also analyzed using our previously developed LDI-MS method and the TOF-SIMS method. For sample preparation, we used an in-house built micro-press, enabling the fixing of both meteorite-like material and real meteoritic splinters onto a target plate. Our unique target system, a universal in-house-designed adapter target holder, facilitated compatibility with all instruments including SIMS from different manufacturers. In the real meteorite samples a variety of elements, including potential detections of rubidium (⁸⁵Rb:⁸⁷Rb = 3:1), cesium (¹³³Cs only), and tentatively holmium (¹⁶⁵Ho only) was predominantly detected in positive-ion mode. Utilizing LDI with a reflectron TOF-MS in negative-ion mode, we identified distinct carbon clusters ranging from C₂ to C₁₃ in the Allende and Jbilet Winselwan meteorites originating most likely from high molecular weight organic carbon compounds. Background analysis confirmed a minimal impact of external contamination with carbon cluster ions validating the authenticity of these findings. No distinct other carbon-containing material could be identified.</p>","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147520979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148123259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148092845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beware the Artifact: Generation of Ellagic Acid and Related Species During Atmospheric Solid Analysis Probe (ASAP) Measurements of Iron Gall Inks and Tannins in the Negative Ionization Mode","authors":"Thomas Willms","doi":"10.1002/jms.70045","DOIUrl":"10.1002/jms.70045","url":null,"abstract":"<p>A detailed comparative analysis of the results of atmospheric solid analysis probe (ASAP) mass spectrometry of inks, tannins, and gallic acid (GA) in the negative ionization mode was performed. Results obtained for tannin by ASAP have been compared with those obtained with electrospray ionization (ESI). Apart from the GA ion, measurements frequently also yielded anions corresponding to association products and condensation products. At zero collision energy, pure GA gave a dimeric adduct (m/z 339); the formation of ions at m/z 303 and 304 was favored by increased temperatures and collision energies. In the case of inks, the subsequent dehydrogenation of such species to ellagic acid (EA) (m/z 301) was attributed to the oxidative effect of the iron III ion. On the basis of the results, a modification of the “standard ink protocol” has been suggested. Furthermore, several yet non-described breakdown products and radical ion species of GA and EA ions were identified.</p>","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13017080/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147512616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":16178,"journal":{"name":"Journal of Mass Spectrometry","volume":"61 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148121583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}