School leadership certification programmes : London, New York and Toronto
Bibliographic record
Abstract
First time we launch an innovative and simple portable in a closed micropipette tip switchable hydrophilicity microextraction syringe system (µS-SHS) couple with electrothermal atomic absorption spectroscopy (ETAAS) was developed for preconcentration and determination of vanadium using 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol (5- Br-PADAP), as complexing. In the proposed method decanoic acid was used as a switchable hydrophilicity extraction solvent and their polarity was switched on and off (water miscible/immiscible) by simply changing their pH. The phase separation was induced by simply adding sulfuric acid that switch off hydrophilicity (nondispersed/immiscible) of decanoic acid. The metal complex enriched phase (V-(5-Br-PADAP-SHS) was separated by simply removing the aqueous phase through manually dispensed syringe system. Then finally acidic ethanol drawn into the syringe contains metal complex enriched SHS phase to reduce viscosity and directly injected into the ETAAS by using an enclosed micropipette tip syringe system. The multivariate strategy was applied to screen out and optimized the variables. Limit of detection (LOD), enhancement factor (EF) and relative standard deviation (RSD) were found 0.0075 µg L<sup>-1</sup>, 120 and 2.91%, respectively. Certified reference material of riverine water (SLRS-4), Apple leaves (NIST SRM 1515) and a standard addition method was used to validate the present method. Developed method was applied to water and food samples. We successfully applied the proposed method to analyze vanadium in different real food and water samples.
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".