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Sample preparation for test of vessels used in food production (ISO 8391-1): Wash vessel in a dilute decon solution at approx. 40°C, rinse with tap water and distilled water, and dry with filter paper. Add acetic acid solution corresponding to 2/3 of the total vessel volume and boil under cover for 2 hours. Stir solution and transfer to plastic jar for analysis.
Sample preparation for test of vessels in contact with food (ISO 6486-1): Wash porcelain with hand dishwashing liquid, rinse with tap water and distilled water, and dry with filter paper. Leach the porcelain in 4% acetic acid and leave under cover for 24 hours at 22°C. Stir solution and transfer to plastic jar for analysis.
Sample preparation for lip test (EN 1388-2:1995): Wash cup with hand dishwashing liquid and rinse with distilled water. Leave cup upside down for 24 hours at ambient temperature in a Petri dish filled to level of 20 mm with 4% acetic acid. Stir solution and transfer to plastic jar for analysis.
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| Threshold values for ceramic objects in contact with food. |
| Object |
Bly |
Kadmium |
| Non-fillable objects and fillable objects with an interior depth from bottom to brim of 25 mm or less |
0.8 mg/dm² |
0.07 mg/dm² |
| Cooking vessels; Packaging and storage vessels with a capacity exceeding 3 litres |
1.5 mg/l |
0.1 mg/l |
| Other fillable objects |
4.0 mg/l |
0.3 mg/l |
National Food Administration Statutes, SLV FS 1997:9.
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