Microwave-Assisted Extraction Method for Organochlorinated Pesticides and Polychlorinated Biphenyls from Compost
Bibliographic record
Abstract
Abstract A laboratory study was conducted to determine the recoveries for selected organochlorinated pesticides (OCPs) and polychlorinated biphenyls (PCBs) by a new microwave assisted extraction (MAE) method developed for compost. The organic matter content of the compost samples is very high and partly soluble in the extraction solvent. Florisil was used as the adsorbent in the cleaning procedure for the extract, and found to clean very well and to give good recoveries from a solution containing a high concentration of humic substances. The compost was spiked 24 h prior to the extraction. Pollutant recoveries were higher when the extraction solvent was hexane-acetone (1:1) (91 to 105% with a standard deviation of 4 to 8%) on air-dried compost. Key Words: Organochlorinated pesticidespolychlorinated biphenylsPCBsmicrowave assisted extractioncompostsoil
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".