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砷是一种早已为人类使用的常见元素,地壳中的含量约为(5～10)×10~(-4)%。虽然在近50年来,含砷杀虫剂和含砷药物的使用已大大减少,但仍然是饮用水、食品和烟叶等的一种常见污染物。砷中毒的研究由来已久,其毒性也为人们所熟知。早在19世纪,砷和癌的关系已引起了人们的注意。White等首先报导了用亚砷酸钾溶液(Fowler’s溶液)治疗牛皮癣的病人发生皮肤癌的病例。以后又报导了在职业性砷接触人群和饮用被砷污染了的水源水的
Arsenic is a common element that has long been used by humans. The amount of arsenic in the earth’s crust is about 5-10 × 10 -4%. Although the use of arsenic-containing and arsenic-containing arsenic drugs has been substantially reduced over the past 50 years, they remain a common source of contaminants for drinking water, food and tobacco. Arsenic poisoning has been studied for a long time and its toxicity is well known. As early as the 19th century, the relationship between arsenic and cancer has attracted people’s attention. White first reported cases of skin cancer in patients treated with potassium arsenite solution (Fowler’s solution) for psoriasis. It was later reported that occupational arsenic was exposed to drinking water and water contaminated by arsenic