DEVELOPMENT AND CHARACTERIZATION OF A NEW COBALT OPTICAL SENSOR BASED ON INCORPORATTING OF SALOPHEN IN A PVC MATRIX
Bibliographic record
Abstract
A new optical sensor is described for determination of cobalt ions. The optode membrane is based on interaction of salophen (N,N’-bis (salicylidene)-o-phenylenediamine) with cobalt ions in plasticized polyvinyl chloride (PVC) membrane, supported on a glass plate. In the fabricated optode, salophen acts as sensing component. Color of the sensing membrane in contact with. Co2+ ions al pH 5.4, was changed from yellow to orange. The membrane composition and other affecting variables were optimized. Under the optimum conditions (i.e. 29.1 % PVC, 63.1 % DOS, 3.9% NaTPB, 7.8% salophen and response time of 5 min.), the proposed sensor displayed a linear range of 0.1-10 µg mL-1 with a detection limit of 0.016 µg mL-1. Also the precision (RSD %) was better than 1.34% for 7 replicate determinations of 2.5 µg mL-1cobalt (II) in various membranes. The sensor showed good selectivity for Co2+ ions with respect to several common al kali, alkaline earth and transition metal ions. The proposed optode was used for determination of Co2+ ions in water samples.
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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 | 0.000 | 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 | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".