Cr的化学形态分析是环境化学的重要课题之一。由于Cr~(3+)是维持生物体内葡萄糖的平衡及蛋白质和脂肪代谢所必须的微量元素,缺Cr~(3+)后胰岛素的生物活性降低,糖耐受量受损,严重时出现尿糖;而Cr~(6+)对人体有毒害作用,能干扰许多重要酶的活性,诱发肺癌等恶性肿瘤,两者的生理效能与生物学作用截然不同。所以,从环境科学的角度来看单纯测定总Cr的含量还远远不够,研究不同形态的分离及测定方法很有必要。 Chemical morphological analysis of Cr is one of the important topics in environmental chemistry. Since Cr 3+ is a trace element necessary to maintain the balance of glucose and protein and fat metabolism in vivo, the biological activity of insulin after the deficiency of Cr 3+ is reduced, the glucose tolerance is impaired, and urine Sugar; and Cr ~ (6+) has a toxic effect on human body and can interfere with the activity of many important enzymes and induce malignant tumors such as lung cancer. Physiological efficacy and biological effects of both are quite different. Therefore, from the point of view of environmental science, the determination of total Cr content is far from enough. Therefore, it is necessary to study different forms of separation and determination methods.