Determination of Volatile Organic Compounds in Gas-phase Mainstream Smoke by Gas Chromatography-mass Spectrometry
Bibliographic record
Abstract
A gas chromatography-mass spectrometry(GC-MS) method was successfully developed and validated for simultaneous determination of five Volatile Origanic Compounds(VOC: 1,3-butadiene,isoprene,acrylonitrile,benzene and toluene) in cigarette gas-phase mainstream smoke.Before smoking,each impinger was spiked with D6-benzene internal standard solution.The gas-phase mainstream smoke was trapped by two impingers filled with methanol cool solution.And then,five VOCs were analyzed by GC-MS under selected ions recording mode.The limit of detection and limit of quantification for each VOC were varied from 0.01 to 0.81 μg/cig and 0.04 to 2.73 μg/cig.Recoveries were in the ranged of 92.3% to 98.5% and intra-and inter-assay precision(RSD%) were 1.95 to 9.21.This new VOCs determination method provided higher sensitivity,specificity,and repeatability than earlier methods.Five VOCs levels of 38 commercially available domestic and overseas cigarettes were determined under ISO(International Organization for Standards) and Canadian intense smoking regime by the proposed method.VOCs levels in mainstream smoke under Canada intense smoking regime were twice higher than ISO regime.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".