Overview
Esoyan et al. compared Armenian matsoun stored in glass and ceramic containers for 15 days at refrigerated temperature. The paper is useful for packaging and dairy matrices because it directly reports lead (Pb), cadmium (Cd), mercury (Hg), and arsenic (As) migration checks in a fermented dairy food. The main signal was a ceramic-container increase in cadmium over storage, while Pb stayed constant and As and Hg were not detected.
Key numbers
| Finding | Source-reported value |
|---|---|
| Samples | Six matsoun samples in sterilized glass and ceramic containers |
| Storage | 4 degrees C; analyzed on days 1, 7, and 15 |
| Metals analyzed | Cd, Pb, Hg, As by atomic absorption spectroscopy |
| Lead | 0.0045 ppm across all samples |
| Cadmium in ceramic containers | Increased from 0.0015 ppm to 0.0029 ppm by day 15 |
| Arsenic and mercury | Nondetectable concentrations |
| Source comparator | Pb remained within the WHO allowed limit of 0.02 ppm; ceramic-packaged Cd exceeded the source-cited 0.002 ppm limit by day 15 |
| pH | Ceramic 4.61 to 4.24; glass 4.60 to 4.27 over 15 days |
| Titratable acidity | Increased in both groups to 1.2 percent lactic acid |
Methods (brief)
The authors prepared matsoun and packaged it in sterilized glass and ceramic containers, each holding 700 mL. Samples were stored at 4 degrees C and tested on days 1, 7, and 15 for pH, titratable acidity, lactic acid bacteria, and heavy-metal migration. Heavy metals were analyzed by atomic absorption spectroscopy.
The metals are reported as total element concentrations in matsoun. The study does not speciate arsenic or mercury, so arsenic and mercury here are totals, with species unspecified.
Implications
For product and packaging pages, this source supports a ceramic-contact migration signal for cadmium in an acidic fermented dairy matrix. It also gives a negative finding for arsenic and mercury under the tested conditions.
For app and standards work, the values are food-in-contact-with-packaging occurrence evidence from Armenia. They should not be pooled with US-market packaged dairy or cookware studies without a later market and matrix comparability decision.
Related evidence
- Glass food storage containers
- Ceramic-coated cookware
- Milk and Dairy
- Lead
- Cadmium
- Mercury, Total
- Arsenic, Total
Update history
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