Simultaneous Determination of Six Major Active Furocoumarins in Radix Glehniae by HPLC-DAD
Bibliographic record
Abstract
A rapid, reliable, and sensitive method for the simultaneous determination of 6 furocoumarins (psoralen, xanthotoxin, bergapten, imperatorin, cnidilin, and isoimperatorin) in Radix glehniae was developed using reversed-phase high-performance liquid chromatography (RP-HPLC) coupled with diode array detection. The HPLC assay was performed on an Ultimate C18 column (5 µm, 250 mm × 4 mm) with gradient elution of acetonitrile and water within 20 min. The detection wavelength was set at 310 nm. All compounds showed good linearity (r2 > 0.999). The RSD of intra-day and inter-day variations ranged from 0.2% to 2.7% and 0.3% to 1.7%. The recovery of the assay was in the range of 91.7–107.6%. The method was successfully applied to the simultaneously determination of 6 furocoumarins in Radix glehniae from different areas.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".