Lead Pb is a toxic heavy metal that is extremely harmful to the human body. Therefore, lead and its compounds will cause harm to many systems such as nerve, hematopoiesis, digestion, kidney, cardiovascular and endocrine system after entering the body. Lead poisoning. With the rapid development of the industrial market, lead has been widely used in all walks of life. Lead is polluting the environment more and more, and the harm to human health is also increasing. At present, lead mainly affects human health through food, drinking water and air. After metallic lead enters the human body, a small part of it will be excreted with the body's metabolism, and a large amount will be deposited in the body. For adults, the invasion of lead can destroy the nervous system, digestive system, male reproductive system and affect the hematopoietic function of bones, and then people will experience dizziness, fatigue, dizziness, drowsiness, insomnia, anemia, weakened immunity, abdominal pain, constipation, and body aches.
Muscles and joints, irregular menstruation and other symptoms. Some have a metallic taste in the mouth, and symptoms such as arteriosclerosis, peptic ulcers and fundus bleeding are also related to lead pollution. For children, the brain is developing and the nervous system is in a sensitive period. Under the same lead environment, the inhalation amount is several times higher than that of adults, and the damage is extremely serious. Therefore, lead poisoning in children will cause developmental delay, loss of appetite, walking inconvenience and constipation. , Insomnia; some are accompanied by hyperactivity, hearing impairment, inattention, and mental retardation. In severe cases, brain tissue damage may result, which may lead to lifelong disability. Lead enters the body of pregnant women and passes through the placental barrier, affecting fetal development, causing malformations, miscarriage or stillbirth.
Therefore, in some developed countries, there are clear regulations on the lead content of some items. For example, in the United States, the lead content of children's products must not exceed 100PPM; the lead content of paint or other surface coatings must not exceed 90PPM; The lead content in leather shall not be higher than 300PPM; the lead content in vinyl plastic shall not be higher than 200PPM; the lead content in other materials shall not be higher than 300PPM (except crystals), etc.
For more information about Pb, testing methods, regulations and directives please contact ATS