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SN/T 4131-2015: Testing methods for barium extracted from domestic ceramicware
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SN/T 4131-2015	English	209	Add to Cart	3 days [Need to translate]	Testing methods for barium extracted from domestic ceramicware

SN/T 4131-2015: Testing methods for barium extracted from domestic ceramicware

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Testing methods for barium extracted from domestic ceramicware People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Method for measuring the amount of cerium dissolved in ceramics for daily use Released on.2015-02-09 2015-09-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009 and GB/T.20001.4-2001. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Shandong Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Hunan Entry-Exit Inspection of the People's Republic of China Epidemic situation. The main drafters of this standard. Zhang Li, Zhang Miao, He Peng, Xiang Haibo, Sun Jizan, Wang Kegang, Xu Hongmin, Ni Rongjun, Wang Le, Tao Lin. Method for measuring the amount of cerium dissolved in ceramics for daily use Warning - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions. question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set by the relevant national regulations.

1 Scope

This standard specifies the determination of the amount of cerium dissolved in daily-use ceramic products by atomic absorption spectrophotometry and inductively coupled plasma emission spectrometry. test methods. This standard applies to the determination of the amount of bismuth dissolved in daily-use ceramic vessels (including daily ceramic products and food contact surfaces and the lip of the beverage container).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 5000 Daily Ceramic Terminology GB/T 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

The following terms and definitions established by GB/T 5000 apply to this document. 3.1 Contact with food surfacescontactwithfoods A surface of a ceramic article used or adapted to modulate, contain, or store a food or beverage that is in direct contact with food during use. 3.2 Lip lipandrimarea The outer surface of the drinking container (such as a cup, mug, teat cup, small bowl, etc.) that is in contact with the lips with a wide upper edge (20.0 ± 1.0) mm. 3.3 Class A product ceramicwareA Daily-use ceramics (such as cups, bowls, plates, pots, cans, etc.) that come into contact with food and can hold solutions. 3.4 Class B products ceramicwareB Daily-use ceramics that are in contact with food but cannot contain solutions (eg ceramic shovel, porous baking tray, cake holder, etc.). 3.5 Drinking container drinkingvessel One of the daily-use ceramics used for ceramics (such as cups, soup bowls, etc.) for beverages or soups.

4 Principle

Using 4% (volume fraction) acetic acid solution, soaking in the dark at 22 °C ± 2 °C for 24h ± 10min, extracting the surface of ceramic products and pottery The enamel dissolved in the lips of porcelain drinking container products, tested by atomic absorption spectrophotometer and inductively coupled plasma optical emission spectrometry The content of bismuth. ...