Overview
This Vietnamese-language study examined the release of cadmium, lead, and manganese from unglazed ceramic food containers into two acidic food matrices: pickled mustard greens juice and soy sauce. It is a food contact material migration study, not a study of metal content in mustard greens as a primary ingredient.
Key numbers
Limited English-language data are extractable from the paper. From the abstract:
- Initial detection limits in the food matrices: cadmium (Cd) 0.20 ppb, Mn 2.0 ppb, lead (Pb) 0.40 ppb
- Migration data show Cd concentrations in pickled mustard greens juice at later time points reached 150 ppb (from Vietnamese text, approximate)
- Pb in ceramic material reported at 569.61 to 757.99 mg/kg range (ceramic composition, not food content)
- Cd in ceramic material: 422.43 to 571.39 mg/kg (ceramic composition)
- The study shows a quadratic increase for Cd migration and a different pattern for Pb over time
Methods
Ceramic containers with known metal composition; acidic food matrices (pickled mustard juice, soy sauce) as simulants; time-series migration measurement; metals by ICP or AAS.
Implications
This study is about food contact material (ceramic container) migration into acidic food, not about metal contamination of mustard greens as an agricultural product. The relevant food safety question it addresses is whether traditional unglazed ceramic fermentation vessels contribute cadmium, lead, or manganese to pickled mustard products. The finding that ceramic containers with high Cd and Pb content can leach measurable amounts into pickled mustard juice is relevant to the processing section of the mustard ingredient page (specifically, container/vessel selection as a contamination pathway for fermented mustard products). The source is evidence-tier C because the full data are in Vietnamese.
Certification: not in HMT&C threshold pools. Routes as packaging/contact-material context for Mustard, regulations/food-contact-materials.
App: No contamination_profile blocks are touched.
Microbiome: Not a focus of this source.
Update history
No substantive edit history is available in this build. The full commit record is available in git.