{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:5QQTZ2AW46GYSKEI3A7ZLV6QR2","short_pith_number":"pith:5QQTZ2AW","schema_version":"1.0","canonical_sha256":"ec213ce816e78d892888d83f95d7d08e87df2f49885721a7f14ccfed99aa87d1","source":{"kind":"arxiv","id":"1907.08900","version":1},"attestation_state":"computed","paper":{"title":"Simultaneous observation of concurrent two-dimensional carbon and chlorine/bromine isotope fractionations of halogenated organic compounds on gas chromatography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"physics.chem-ph","authors_text":"Caiming Tang, Jianhua Tan","submitted_at":"2019-07-21T03:14:42Z","abstract_excerpt":"It has been reported that isotope fractionation can occur on gas chromatography (GC), yet little is known about concurrent dual-elements isotope fractionations on GC. Revelation of concurrent two-dimensional carbon and chlorine/bromine isotope fractionations of halogenated organic compounds (HOCs) on GC may be of important significance for compound-specific isotope analysis (CSIA). This study presents an in-depth investigation of the two-dimensional C and Cl/Br isotope fractionations of HOCs on GC using GC-double focus magnetic-sector high resolution mass spectrometry (GC-DFS-HRMS). The two-di"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1907.08900","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-07-21T03:14:42Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"7f1a1795052b54280273f8b1de12369fb8671dda8f664323ed32821d8048da3a","abstract_canon_sha256":"0486d92f0635e8f959efc94add555a2092240da28768ec476c06122be25bbe1b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:02.794451Z","signature_b64":"MzcrAYYX6AFDfpY8MSGzcpmNS2EdR7rKQdSr02S5KJzhSqWKOuD7+ub7MzY+r3tYh7b4Zkds+z6kehbcJT5VCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec213ce816e78d892888d83f95d7d08e87df2f49885721a7f14ccfed99aa87d1","last_reissued_at":"2026-05-17T23:40:02.793758Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:02.793758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Simultaneous observation of concurrent two-dimensional carbon and chlorine/bromine isotope fractionations of halogenated organic compounds on gas chromatography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"physics.chem-ph","authors_text":"Caiming Tang, Jianhua Tan","submitted_at":"2019-07-21T03:14:42Z","abstract_excerpt":"It has been reported that isotope fractionation can occur on gas chromatography (GC), yet little is known about concurrent dual-elements isotope fractionations on GC. Revelation of concurrent two-dimensional carbon and chlorine/bromine isotope fractionations of halogenated organic compounds (HOCs) on GC may be of important significance for compound-specific isotope analysis (CSIA). This study presents an in-depth investigation of the two-dimensional C and Cl/Br isotope fractionations of HOCs on GC using GC-double focus magnetic-sector high resolution mass spectrometry (GC-DFS-HRMS). The two-di"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.08900","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1907.08900","created_at":"2026-05-17T23:40:02.793857+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.08900v1","created_at":"2026-05-17T23:40:02.793857+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.08900","created_at":"2026-05-17T23:40:02.793857+00:00"},{"alias_kind":"pith_short_12","alias_value":"5QQTZ2AW46GY","created_at":"2026-05-18T12:33:10.108867+00:00"},{"alias_kind":"pith_short_16","alias_value":"5QQTZ2AW46GYSKEI","created_at":"2026-05-18T12:33:10.108867+00:00"},{"alias_kind":"pith_short_8","alias_value":"5QQTZ2AW","created_at":"2026-05-18T12:33:10.108867+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2","json":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2.json","graph_json":"https://pith.science/api/pith-number/5QQTZ2AW46GYSKEI3A7ZLV6QR2/graph.json","events_json":"https://pith.science/api/pith-number/5QQTZ2AW46GYSKEI3A7ZLV6QR2/events.json","paper":"https://pith.science/paper/5QQTZ2AW"},"agent_actions":{"view_html":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2","download_json":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2.json","view_paper":"https://pith.science/paper/5QQTZ2AW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.08900&json=true","fetch_graph":"https://pith.science/api/pith-number/5QQTZ2AW46GYSKEI3A7ZLV6QR2/graph.json","fetch_events":"https://pith.science/api/pith-number/5QQTZ2AW46GYSKEI3A7ZLV6QR2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2/action/storage_attestation","attest_author":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2/action/author_attestation","sign_citation":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2/action/citation_signature","submit_replication":"https://pith.science/pith/5QQTZ2AW46GYSKEI3A7ZLV6QR2/action/replication_record"}},"created_at":"2026-05-17T23:40:02.793857+00:00","updated_at":"2026-05-17T23:40:02.793857+00:00"}