Determination of Mequitazine in Tablets by Difference Spectrophotometry Based on the Absorption of its Sulfoxide
Bibliographic record
Abstract
A new method is described for the rapid determination of (R)-(+)-Mequitazine. The drug is determined by a difference spectrophotometric technique based upon the absorbance of its sulphoxide derivative relative to the absorbance of a solution of the underivatized drug. The sulphoxide derivative are formed rapidly and quantitatively at room temperature by the addition of a solution of potassium caroate in form Oxone. The difference absorbance of the solutions is proportional to the concentration of the Mequitazine in the preparation and is specific for the intact drug in the presence of oxidative and photochemical decomposition products and excipients. Linearity range 1.00–35.00 µg/mL. The regression line equation is ΔA (342 nm) =0.05×C (r=0.99) where C is in µg/ml Mequitazine. The limit of quantitation, LOQ (10S), is 1.0 µg/mL. The possibility of quantitative determination of Mequitazin in Primalan 10 mg tablets has been demonstrated. RSD ≤ 1.5%; ((– µ) 100%/µ =+0.80%). ‘µ’ is data of quantitative determination by the reference pharmacopoeial method.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".