加拿大玩具安全问题

谢谢。
您好，我想在请教一个关于ASTM F963-11中： 4.3.8 DEHP (DOP)—Pacifiers, rattles, and teethers shall not intentionally contain DI (2-ethylhexyl) phthalate (also
known as dioctyl phthalate). To prevent trace amounts of DEHP (DOP) from affecting analysis, up to 3 % of total solid content will be accepted in the result, when tested in accordance with Practice。
请问如何理解呢？
谢谢。