Interlaboratory Trial on the Determination of Selenium in Lyophilized Human Serum, Blood and Urine Using Hydride Generation Atomic Absorption Spectrometry
Bibliographic record
Abstract
An interlaboratory collaborative study was conducted on the determination of total selenium (Se) with hydride generation atomic absorption spectrometry. Six different materials were investigated, four lyophilized body fluids, an acid-digested body fluid and an acidified aqueous reference solution. The main objective was to find out if accurate values for Se can be obtained with hydride generation atomic absorption spectrometry when an appropriate sample decomposition technique is used. The proposed procedure included a decomposition with nitric, sulphuric and perchloric acids to a final temperature of 310 °C in special flasks with long necks. The results obtained by 9 laboratories using the proposed decomposition procedure and 4 laboratories using slight modifications of it show excellent agreement with the values established in previous interlaboratory trials or by experienced laboratories using a number of independent techniques.
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 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 | 0.001 | 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".