A sensitive and simple analytical method for the determination of stable Cs in estuarine and coastal waters
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A highly sensitive and simple analytical method is applied to the determination of Cs in estuarine and coastal waters. This analytical method combines adsorption of Cs on ammonium 12-molybdophosphate (AMP) and an ion exchange resin column, followed by subsequent ICPMS measurement. Significantly, the method requires a relatively small amount of sample volume (minimum volume: 20 mL) for the analysis by the selection of AMP with a low Cs impurity (0.02 ng-Cs mg−1-AMP). The method has a detection limit of 1.0 ng L−1 and a limit of quantification of 3.3 ng L−1 based on replicate analyses of purified water samples. A sample storage strategy is also investigated: no time dependent changes are found in the concentrations for acidified samples (pH 1.0–1.5) used immediately (storage: 0 day) to those stored for two months in a dark place at room temperature (4–20 °C) or in a freezer (ca. −20 °C). Respective Cs concentrations of 95.8 ± 0.9, 202.8 ± 3.6 and 197.0 ± 1.9 ng L−1 are obtained in estuarine water (SLEW-3), coastal seawater (CASS-4) and seawater (NASS-5) certified reference materials for heavy metals. In an application of the method to determination of Cs in estuarine and coastal regions of Japan, the obtained Cs concentrations vary from 11.2 to 306.4 ng L−1 at a salinity range of 0.1 to 33.6.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it