The fluorine content in the residue of acid lixivium is a constant.These factors should be taken into account when the limits is laid down for fluoride exposure and fluorine levels in foodstuff.

• 玉米和辣椒的酸不溶态氟含量基本为一定值，这两点在制订粮食的含氟量及人体的摄氟量卫生标准时宜作适当考虑。