一、样品来源:均收取住院或门诊有饮酒史、慢性铅中毒可疑者24小时尿混句后吸取250ml作为检品。二、尿液样品的处理:全部均采用硝酸—硫酸—高氯酸热消化法。三、检验方法:尿铅测定—一双硫腙比色法; First, the sample source: All hospital admission or outpatient drinking history, chronic lead poisoning Suspicious 24-hour urine mixture after taking 250ml as seized goods. Second, the urine sample processing: All are used nitric acid - sulfuric acid - perchloric acid heat digestion. Third, the test method: Determination of urinary lead - a dithizone colorimetry;