三聚氰胺限量标准

香港:奶类以及供36个月以下婴幼儿、孕妇及供哺乳女性食用的食物中，三聚氰胺最高浓度不得多于每公斤含1毫克，而其他食物可容许的最高浓度不得多于每公斤含2.5毫克。
美国是2.5mg/kg(http://www.cfsan.fda.gov/~dms/melamra3.html看最后一段)
欧盟也是2.5mg/kg
加拿大标准也是2.5ppm
Health Canada has set the following interim standards for melamine in products containing milk and milk-derived ingredients:

* Infant formula and sole source nutrition products, including meal replacement products
o Maximum of 1.0 part per million (ppm*)
* Other food products containing milk and milk-derived ingredients
o Maximum of 2.5 ppm*
这次算是中国和世界接轨了

不太清楚