Efficacy of chlorine sanitizer spray bottles exposed to various temperatures and ambient light
Bibliographic record
Abstract
Background: Gastroenteritis is largely under reported across Canada. It is estimated that one reported case represents on average 313 cases. In addition, improper cleaning is one of the top ten reported causes of food borne illness. Sanitization is important to reduce the number of pathogenic microorganisms present on food contact surfaces to a safe level. Correct concentrations of sodium hypochlorite are to be prepared and used within the range of 100ppm – 200ppm on food contact surfaces. The purpose of this study was to evaluate the rate of degradation of sodium hypochlorite in spray bottles to assess if these solutions need to be prepared fresh daily to achieve efficacy. Two variables seen within a food service establishment were chosen to evaluate the rate of degradation, temperature and ambient light. Method: Room temperature (20˚C), 35˚C and ambient light exposure were tested to evaluate their effect on the degradation of free chlorine in spray bottles over time in days. The experiment was preformed by setting up 3 individual spray bottles at 20˚C with no light, 20˚C with ambient light and 35˚C with no light. The sodium hypochlorite was then sampled and recorded periodically three times a week over a 15-day period to determine the stability of the chorine solutions prepared at around 200ppm. Results: In the order of spray bottles tested, 20˚C no light, 20˚C ambient light and 35˚C no light, a correlation coefficient of -0.3027, -0.8235 and -0.8169 were recorded. In addition, the following test spray bottles held a r-squared value of 0.0916, 0.6781 and 0.6674. A p-value of 0.5094, 0.0249 and 0.0249 were also assessed, with a corresponding power of 8.99%, 73.74% and 71.75%. Conclusions: By calculating the linear regression formula, it was concluded that chlorine solution in spray bottles do not need to be prepared fresh daily. For 200ppm 20˚C no light, 200ppm 20˚C ambient light and 200ppm 35˚C no light, at days 128, 67 and 45, the estimated concentration of sodium hypochlorite will be at the minimum requirement of 100ppm respectively.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".