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1991年我站对衡阳市城区6～17岁600名中小学生(男323,女277)随机抽样进行头发中的锌、铜、铁、钙元素测定,取两鬓至后枕部离头皮1～2厘米处头发,用1%海鸥洗净剂浸洗30分钟,用去离子水洗净,于80℃烘干,称0.5克,用硝酸、高氯酸(8:1)湿法消化样品,用WYX—402—B型原子吸收分光光度
In 1991, I took samples of 600 primary and secondary schoolchildren (male 323, female 277) from 6 to 17 years old in Hengyang City for random determination of zinc, copper, iron and calcium in the hair, 2 cm hair, dipping with 1% seagull detergent for 30 minutes, washed with deionized water, dried at 80 ℃, said 0.5 g, wet digestion samples with nitric acid, perchloric acid (8: 1) Absorbance spectrophotometry with WYX-402-B atom