摘要
目的建立一种简单、快速、准确的测定人头发样品中硒的方法。方法取适量头发,洗净,晾干,剪碎,利用优级纯硝酸浸润,放置过夜,在通风柜内利用水浴加热的方法,将头发样品制备成溶液,加入硝酸镍作为样品改进剂,用石墨炉原子吸收法测定头发中硒。结果在选定的测定条件下,检出限为0.004mg/L,在0.008～0.04mg/L的浓度范围内,吸光度与浓度的线性相关系数达到0.9969,对头发样品进行6次测定的RSD为3.7%。在0.01mg/L的浓度级上,准确度实验的回收率在93.8%～98.8%之间。结论该方法操作简便,检出限低,线性范围合理,用于头发中硒的测定,效果令人满意。
Objective To develop a simple, rapid, accurate method to determine selenium in human hair. Methods Digested in the superior grade pure nitric acid, Ni(NO3)2·6H2O was used as the improver and the content of selenium in the hair samples was determined by graphite furnace atomic absorption spectrometer. Results Under the designed standard conditions, the detection limit was 0.004 mg/L, in the range of 0.008-0.04 mg/L, the linearity relevance coefficient of absorbency and concentration was 0.996 9, the RSD was 3.7%. At the level of 0.01 mg/L, the recovery rates were 93.8%-98.8%. Conclusion The method is simple, rapid, accurate and is suitable for the determination of selenium in the hair.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2007年第9期728-729,共2页
Journal of Environment and Health
关键词
头发
硒
石墨炉
原子吸收
Hair
Selenium
Graphite furnace
Atomic absorption spectrometry
