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Shenzhen Port Detected Imported Grape Containing Excessive Copper

Recently£¬ one imported wine enterprise in Shenzhen Futian Bonded Zone declared to import  a batch of grade wine in oak barrels from France. The total quantity was 450 litres, with a total value of 3090 euros. After being tested, it was found that the grade wine contained 1.1 mg copper/litre, exceeding standard limit of copper regulated by the mandatory terms in GB15037-2006 Grape wine.

Sources of copper in grape wine are mainly as follows:
1. The copper in the cultivation soil exceeds standard.
2. Grade wine has contact with metal container during making, filtering and other production process, which may increase copper in grape wine.
3. If grapes are being spayed too much before picking, the cupric ion on the skin of grapes will become more, which leads the increase of copper content in grape wine.

The exceeding copper in grape wine will accelerate oxidation of grade wine, and make wine generate turbidity and sediment, and thus affect the stability, the color and the taste of wine. As a kind of microelement, copper is good to human body under normal circumstance. But the excessive consumption might trigger copper poisoning which will cause neurological damages.

In recent years, the excessive content of heavy metals has become one of the main reasons behind return of unqualified imported red grape wine. To ensure the quality and safety of imported grape wine and protect the interest of consumers, Shenzhen CIQ reminds import enterprises of grape wine to improve food safety responsibility awareness.  When purchasing grape wine from overseas, it is suggested to learn more about the quality conditions of producing area and chateau, and to urge foreign manufacturers strengthen control of production process and avoid grade wine contacting with containers and tools that contain copper for a long time. Meanwhile, domestic enterprise shall set up record system of import and sales to keep detailed record of batch number of grape wine, names and contact methods of exporters and buyers so as to establish a sound traceability system