食品中的镉主要来自含镉工业废水排入水体,使水镉含量增加,鱼类、贝类从水中摄取镉,贝类浓集镉的系数最高,可达105～106,一般鱼的含镉量约0.09mg/kg。大气中镉飘尘的沉降,污水灌溉都能增加土壤中镉含量。植物通过土壤吸收,粮食、蔬菜、水果都可能有镉的污染。因此,食品中镉的检 Cadmium in food mainly comes from cadmium-containing industrial waste water discharged into the water, so that the water and cadmium content increased, fish, shellfish intake of cadmium from water, the highest concentration of shellfish cadmium, up 105 ~ 106, the general cadmium About 0.09 mg / kg. Cadmium dust in the atmosphere of sedimentation, sewage irrigation can increase the content of cadmium in the soil. Plants absorb through the soil, grain, vegetables, fruits may have cadmium pollution. Therefore, the detection of cadmium in food