Microfluidic Reference Electrode with Free-Diffusion Liquid Junction
Bibliographic record
Abstract
The accuracy of many biological and chemical sensors is critically dependent on the stability of the potential imposed or sensed through a reference electrode. As these sensors are miniaturized, the reference electrode has to be miniaturized simultaneously without any loss to its stability. In this paper, we describe a new microfluidic miniaturized silver/silver chloride reference electrode that demonstrates significantly better stability and lifetime than conventional designs. In our new design, we have miniaturized the existing format of the macroscale reference electrode and added the capability to replenish the internal solution by integrating it with a microfluidic channel. The replenishment of the internal solution significantly improves the performance of these electrodes over other miniaturized designs. We demonstrate reference electrodes that are very stable (potential variation of <0.1 mV), with minimal drift (∼1 mV) and lifetimes longer than 100 hours. We have also characterized the behavior of these electrodes to changes in pH and chlorine concentration of the external solution. The results indicate insensitivity of the microfluidic reference electrode potential to the presence of any analyte in the test solution.
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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 | 0.001 |
| 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".