{"id":"https://openalex.org/W4388408225","doi":"https://doi.org/10.3390/s23219005","title":"Quartz-Enhanced Photoacoustic Sensor Based on a Multi-Laser Source for In-Sequence Detection of NO2, SO2, and NH3","display_name":"Quartz-Enhanced Photoacoustic Sensor Based on a Multi-Laser Source for In-Sequence Detection of NO2, SO2, and NH3","publication_year":2023,"publication_date":"2023-11-06","ids":{"openalex":"https://openalex.org/W4388408225","doi":"https://doi.org/10.3390/s23219005","pmid":"https://pubmed.ncbi.nlm.nih.gov/37960706"},"language":"en","primary_location":{"id":"doi:10.3390/s23219005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s23219005","pdf_url":"https://www.mdpi.com/1424-8220/23/21/9005/pdf?version=1699275779","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/1424-8220/23/21/9005/pdf?version=1699275779","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010446031","display_name":"Pietro Patimisco","orcid":"https://orcid.org/0000-0002-7822-2397"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Pietro Patimisco","raw_affiliation_strings":["PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy","Polysense Innovations Srl 2, Via Amendola 173, I-70100 Bari, Italy"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy","institution_ids":[]},{"raw_affiliation_string":"Polysense Innovations Srl 2, Via Amendola 173, I-70100 Bari, Italy","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5093204254","display_name":"Nicoletta Ardito","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Nicoletta Ardito","raw_affiliation_strings":["PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5079385998","display_name":"Edoardo De Toma","orcid":"https://orcid.org/0009-0005-1584-9386"},"institutions":[{"id":"https://openalex.org/I160414472","display_name":"Schott (Germany)","ror":"https://ror.org/000q08p21","country_code":"DE","type":"company","lineage":["https://openalex.org/I160414472"]},{"id":"https://openalex.org/I62916508","display_name":"Technical University of Munich","ror":"https://ror.org/02kkvpp62","country_code":"DE","type":"education","lineage":["https://openalex.org/I62916508"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Edoardo De Toma","raw_affiliation_strings":["Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany"],"raw_orcid":"https://orcid.org/0009-0005-1584-9386","affiliations":[{"raw_affiliation_string":"Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany","institution_ids":["https://openalex.org/I160414472","https://openalex.org/I62916508"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5013372038","display_name":"Dominik Burghart","orcid":"https://orcid.org/0009-0006-2230-3354"},"institutions":[{"id":"https://openalex.org/I160414472","display_name":"Schott (Germany)","ror":"https://ror.org/000q08p21","country_code":"DE","type":"company","lineage":["https://openalex.org/I160414472"]},{"id":"https://openalex.org/I62916508","display_name":"Technical University of Munich","ror":"https://ror.org/02kkvpp62","country_code":"DE","type":"education","lineage":["https://openalex.org/I62916508"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Dominik Burghart","raw_affiliation_strings":["Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany","institution_ids":["https://openalex.org/I160414472","https://openalex.org/I62916508"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5071826466","display_name":"Vladislav Tigaev","orcid":null},"institutions":[{"id":"https://openalex.org/I160414472","display_name":"Schott (Germany)","ror":"https://ror.org/000q08p21","country_code":"DE","type":"company","lineage":["https://openalex.org/I160414472"]},{"id":"https://openalex.org/I62916508","display_name":"Technical University of Munich","ror":"https://ror.org/02kkvpp62","country_code":"DE","type":"education","lineage":["https://openalex.org/I62916508"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Vladislav Tigaev","raw_affiliation_strings":["Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany","institution_ids":["https://openalex.org/I160414472","https://openalex.org/I62916508"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014532691","display_name":"Mikhail A. Belkin","orcid":"https://orcid.org/0000-0003-3172-9462"},"institutions":[{"id":"https://openalex.org/I160414472","display_name":"Schott (Germany)","ror":"https://ror.org/000q08p21","country_code":"DE","type":"company","lineage":["https://openalex.org/I160414472"]},{"id":"https://openalex.org/I62916508","display_name":"Technical University of Munich","ror":"https://ror.org/02kkvpp62","country_code":"DE","type":"education","lineage":["https://openalex.org/I62916508"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Mikhail A. Belkin","raw_affiliation_strings":["Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany"],"raw_orcid":"https://orcid.org/0000-0003-3172-9462","affiliations":[{"raw_affiliation_string":"Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, D-85748 Garching, Germany","institution_ids":["https://openalex.org/I160414472","https://openalex.org/I62916508"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5049910998","display_name":"Vincenzo Spagnolo","orcid":"https://orcid.org/0000-0002-4867-8166"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Vincenzo Spagnolo","raw_affiliation_strings":["PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy","Polysense Innovations Srl 2, Via Amendola 173, I-70100 Bari, Italy"],"raw_orcid":"https://orcid.org/0000-0002-4867-8166","affiliations":[{"raw_affiliation_string":"PolySense Lab-Dipartimento Interateneo di Fisica, Politecnico and University of Bari, Via Amendola 173, I-70100 Bari, Italy","institution_ids":[]},{"raw_affiliation_string":"Polysense Innovations Srl 2, Via Amendola 173, I-70100 Bari, Italy","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5010446031","https://openalex.org/A5049910998"],"corresponding_institution_ids":[],"apc_list":{"value":2400,"currency":"CHF","value_usd":2598},"apc_paid":{"value":2400,"currency":"CHF","value_usd":2598},"fwci":2.1695,"has_fulltext":true,"cited_by_count":15,"citation_normalized_percentile":{"value":0.87412185,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":98,"max":99},"biblio":{"volume":"23","issue":"21","first_page":"9005","last_page":"9005"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11111","display_name":"Spectroscopy and Laser Applications","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11111","display_name":"Spectroscopy and Laser Applications","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11320","display_name":"Atmospheric Ozone and Climate","score":0.9979000091552734,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11588","display_name":"Atmospheric and Environmental Gas Dynamics","score":0.9976000189781189,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/quantum-cascade-laser","display_name":"Quantum cascade laser","score":0.8307174444198608},{"id":"https://openalex.org/keywords/photoacoustic-spectroscopy","display_name":"Photoacoustic spectroscopy","score":0.8003694415092468},{"id":"https://openalex.org/keywords/collimated-light","display_name":"Collimated light","score":0.6335065960884094},{"id":"https://openalex.org/keywords/beam","display_name":"Beam (structure)","score":0.5499675273895264},{"id":"https://openalex.org/keywords/laser","display_name":"Laser","score":0.5243180990219116},{"id":"https://openalex.org/keywords/detection-limit","display_name":"Detection limit","score":0.4703384041786194},{"id":"https://openalex.org/keywords/parts-per-notation","display_name":"Parts-per notation","score":0.44778522849082947},{"id":"https://openalex.org/keywords/photoacoustic-imaging-in-biomedicine","display_name":"Photoacoustic imaging in biomedicine","score":0.43838950991630554},{"id":"https://openalex.org/keywords/quartz","display_name":"Quartz","score":0.42861056327819824},{"id":"https://openalex.org/keywords/cascade","display_name":"Cascade","score":0.42258840799331665},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.41017383337020874},{"id":"https://openalex.org/keywords/optoelectronics","display_name":"Optoelectronics","score":0.4053857624530792},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.38203269243240356},{"id":"https://openalex.org/keywords/analytical-chemistry","display_name":"Analytical Chemistry (journal)","score":0.3803194761276245},{"id":"https://openalex.org/keywords/chemistry","display_name":"Chemistry","score":0.35227644443511963},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10187387466430664},{"id":"https://openalex.org/keywords/chromatography","display_name":"Chromatography","score":0.090221107006073}],"concepts":[{"id":"https://openalex.org/C2776957298","wikidata":"https://www.wikidata.org/wiki/Q1407411","display_name":"Quantum cascade laser","level":3,"score":0.8307174444198608},{"id":"https://openalex.org/C2777286522","wikidata":"https://www.wikidata.org/wiki/Q900415","display_name":"Photoacoustic spectroscopy","level":3,"score":0.8003694415092468},{"id":"https://openalex.org/C34445779","wikidata":"https://www.wikidata.org/wiki/Q1571347","display_name":"Collimated light","level":3,"score":0.6335065960884094},{"id":"https://openalex.org/C168834538","wikidata":"https://www.wikidata.org/wiki/Q3705329","display_name":"Beam (structure)","level":2,"score":0.5499675273895264},{"id":"https://openalex.org/C520434653","wikidata":"https://www.wikidata.org/wiki/Q38867","display_name":"Laser","level":2,"score":0.5243180990219116},{"id":"https://openalex.org/C119128265","wikidata":"https://www.wikidata.org/wiki/Q900165","display_name":"Detection limit","level":2,"score":0.4703384041786194},{"id":"https://openalex.org/C56819118","wikidata":"https://www.wikidata.org/wiki/Q27084","display_name":"Parts-per notation","level":2,"score":0.44778522849082947},{"id":"https://openalex.org/C54932901","wikidata":"https://www.wikidata.org/wiki/Q7187705","display_name":"Photoacoustic imaging in biomedicine","level":2,"score":0.43838950991630554},{"id":"https://openalex.org/C2779870107","wikidata":"https://www.wikidata.org/wiki/Q43010","display_name":"Quartz","level":2,"score":0.42861056327819824},{"id":"https://openalex.org/C34146451","wikidata":"https://www.wikidata.org/wiki/Q5048094","display_name":"Cascade","level":2,"score":0.42258840799331665},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.41017383337020874},{"id":"https://openalex.org/C49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","level":1,"score":0.4053857624530792},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.38203269243240356},{"id":"https://openalex.org/C113196181","wikidata":"https://www.wikidata.org/wiki/Q485223","display_name":"Analytical Chemistry (journal)","level":2,"score":0.3803194761276245},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.35227644443511963},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10187387466430664},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.090221107006073},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.3390/s23219005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s23219005","pdf_url":"https://www.mdpi.com/1424-8220/23/21/9005/pdf?version=1699275779","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},{"id":"pmid:37960706","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/37960706","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors (Basel, Switzerland)","raw_type":null},{"id":"pmh:oai:pubmedcentral.nih.gov:10649992","is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/10649992","pdf_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC10649992/pdf/sensors-23-09005.pdf","source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sensors (Basel)","raw_type":"Text"},{"id":"pmh:oai:doaj.org/article:4b782f0fe67a44bea9d0683f15609daf","is_oa":true,"landing_page_url":"https://doaj.org/article/4b782f0fe67a44bea9d0683f15609daf","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Sensors, Vol 23, Iss 21, p 9005 (2023)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3390/s23219005","is_oa":true,"landing_page_url":"https://doi.org/10.3390/s23219005","pdf_url":"https://www.mdpi.com/1424-8220/23/21/9005/pdf?version=1699275779","source":{"id":"https://openalex.org/S101949793","display_name":"Sensors","issn_l":"1424-8220","issn":["1424-8220"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Sensors","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G3602658959","display_name":null,"funder_award_id":"PE0000023-NQSTI","funder_id":"https://openalex.org/F4320321873","funder_display_name":"Ministero dell\u2019Istruzione, dell\u2019Universit\u00e0 e della Ricerca"},{"id":"https://openalex.org/G6501375850","display_name":null,"funder_award_id":"101016956","funder_id":"https://openalex.org/F4320320300","funder_display_name":"European Commission"},{"id":"https://openalex.org/G777498305","display_name":null,"funder_award_id":"PE0000023-NQSTI","funder_id":"https://openalex.org/F4320320300","funder_display_name":"European Commission"},{"id":"https://openalex.org/G8199362442","display_name":null,"funder_award_id":"101016956","funder_id":"https://openalex.org/F4320321873","funder_display_name":"Ministero dell\u2019Istruzione, dell\u2019Universit\u00e0 e della Ricerca"}],"funders":[{"id":"https://openalex.org/F4320320300","display_name":"European Commission","ror":"https://ror.org/00k4n6c32"},{"id":"https://openalex.org/F4320321873","display_name":"Ministero dell\u2019Istruzione, dell\u2019Universit\u00e0 e della Ricerca","ror":"https://ror.org/0166hxq48"}],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W4388408225.pdf"},"referenced_works_count":25,"referenced_works":["https://openalex.org/W1998982109","https://openalex.org/W2079227690","https://openalex.org/W2143489414","https://openalex.org/W2218430543","https://openalex.org/W2304785969","https://openalex.org/W2327243907","https://openalex.org/W2540193612","https://openalex.org/W2611138196","https://openalex.org/W2908963478","https://openalex.org/W2931270649","https://openalex.org/W2974914015","https://openalex.org/W2982887073","https://openalex.org/W2997661736","https://openalex.org/W3033419395","https://openalex.org/W3080577450","https://openalex.org/W3130643031","https://openalex.org/W3194682408","https://openalex.org/W4200599926","https://openalex.org/W4214916357","https://openalex.org/W4214946896","https://openalex.org/W4237761245","https://openalex.org/W4252069976","https://openalex.org/W4255387760","https://openalex.org/W4308077145","https://openalex.org/W4317034761"],"related_works":["https://openalex.org/W390006624","https://openalex.org/W608296428","https://openalex.org/W4388497782","https://openalex.org/W4403070166","https://openalex.org/W2051153911","https://openalex.org/W2372669038","https://openalex.org/W4387716966","https://openalex.org/W2165230978","https://openalex.org/W2301239990","https://openalex.org/W4388408225"],"abstract_inverted_index":{"In":[0],"this":[1],"work,":[2],"we":[3],"report":[4],"on":[5],"the":[6,120],"implementation":[7],"of":[8,30,60,72,94,111,122,126],"a":[9,36,68],"multi-quantum":[10],"cascade":[11],"laser":[12],"(QCL)":[13],"module":[14,40],"as":[15],"an":[16,43,108],"innovative":[17],"light":[18],"source":[19,27],"for":[20,48,58,82,102],"quartz-enhanced":[21],"photoacoustic":[22],"spectroscopy":[23],"(QEPAS)":[24],"sensing.":[25],"The":[26,52,114],"is":[28],"composed":[29],"three":[31,50,104],"different":[32],"QCLs":[33],"coupled":[34],"with":[35,90],"dichroitic":[37],"beam":[38,46],"combiner":[39],"that":[41],"provides":[42],"overlapping":[44],"collimated":[45],"output":[47],"all":[49],"QCLs.":[51],"3\u03bb-QCL":[53],"QEPAS":[54],"sensor":[55],"was":[56],"tested":[57],"detection":[59,92,115],"NO<sub>2</sub>,":[61,83,127],"SO<sub>2</sub>,":[62,84,128],"and":[63,77,85,99,129],"NH<sub>3</sub>":[64,86,130],"in":[65,67,131],"sequence":[66],"laboratory":[69],"environment.":[70],"Sensitivities":[71],"19.99":[73],"mV/ppm,":[74,76],"19.39":[75],"73.99":[78],"mV/ppm":[79],"were":[80,117],"reached":[81],"gas":[87],"detection,":[88],"respectively,":[89,106],"ultimate":[91],"limits":[93,116],"9":[95],"ppb,":[96,98],"9.3":[97],"2.4":[100],"ppb":[101],"these":[103],"gases,":[105],"at":[107],"integration":[109],"time":[110],"100":[112],"ms.":[113],"well":[118],"below":[119],"values":[121],"typical":[123],"natural":[124],"abundance":[125],"air.":[132]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":8},{"year":2024,"cited_by_count":5}],"updated_date":"2026-01-24T23:23:39.755997","created_date":"2023-11-07T00:00:00"}
