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多年来,不少人研究测定人发中某些金属(如砷、汞、锰、镉、铅等)含量来了解其与环境污染的关系。头发的生长速度在人的一生中较为恒定。一个头皮毛囊在儿童每月生长10—13.5毫米,成人生长7.1～12。2毫米,头发在生长过程中.蓄积许多重金属,这些重金属与毛囊中蛋白质的巯基牢固地结合,例如。头发组织中的铅经水洗、清洁剂揉洗或煮沸或稀酸、酒精浸泡都不能除去
Over the years, many people study the determination of human hair in certain metals (such as arsenic, mercury, manganese, cadmium, lead, etc.) content to understand its relationship with environmental pollution. Hair growth rate in human life is more constant. A scalp hair follicle grows 10-13.5 millimeters per month in children and 7.1-12.2 millimeters in adults, where hair accumulates many heavy metals that bind strongly to sulfhydryl groups in the hair follicles, for example. Lead in hair tissue after washing, detergent rubbing or boiling or dilute acid, alcohol can not be removed