Analysis of Hydroquinone Bis(2-Hydroxyethyl) Ether by High Performance Liquid Chromatography-Ultraviolet Spectrometry
Bibliographic record
Abstract
A high performance liquid chromatography-ultraviolet spectrometry(HPLC-UV) method has been developed for determination of hydroquinone bis(2-hydroxyethyl)ether(HQEE) and hydroquinone in industrial HQEE,a kind of polyurethane chain-extender.Separation of HQEE,hydroquinone and other relative impurities was achieved on a LiChrospher CN column by using methanol-water-1% aqueous acetic acid solution(10∶50∶40,V/V/V) as the mobile phase at a flow rate of 1.0 mL/min.Detection was operated by UV absorption at a wavelength of 285 nm.The method is rapid,reliable and suitable for effective control and improving HQEE quality in synthesis.
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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) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.006 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".