Development of Rotating Electrochemical Detectors for Capillary Electrophoresis
Bibliographic record
Abstract
A rotating disk electrode (RDE) has been evaluated and optimized for the detection of electroactive species separated by capillary electrophoresis (CE). With catechol as a working model, the limit of detection was estimated to be 0.3 microM, i.e., approximately 2.5-fold better than that of the stationary disk electrode (0.7 microM). Separation efficiency was significantly improved as exemplified by an increase of theoretical plates from 26,000 plates/m at 0 rpm to 67,000 plates/m at 500 rpm. Of particular importance was the capability of RDE to alleviate electrode passivation and electrical interference associated with high separation potential fields. Therefore, rotation amperometry was especially useful for analytes such as phenolic compounds that tended to rapidly foul the electrode surface. The RDE/ CE system was capable of separation and determination of pentachlorophenol in contaminated soils, and the result obtained agreed well with conventional liquid chromatography, an EPA recommended procedure.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.010 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.004 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.002 |
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 source (direct Gemma or distilled Codex), 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".