摘要
对测定镍的石墨炉原子吸收法进行优化。优化测定镍时石墨炉的灰化温度和原子化温度;并对校准曲线及检出限、精密度、加标回收率等指标进行测定。结果:结果表明在灰化温度700℃,原子化温度2100℃的条件下,此方法的吸光度最高,灵敏度最佳。在此条件下镍含量在0~50μg/L范围内呈良好的线性关系,方法检出限为0. 0436μg/L,精密度为1. 11%~3. 86%,加标回收率为91. 5%~104. 5%。优化后的方法检出限低,灵敏度高,操作简单,成本经济,适合在基层单位推广。
The method detecting nickel through graphite furnace atomic absorption was optimized. The ashing and atomization temperature of nickel determined by graphite furnaceatomic absorption were optimized. The calibration curve,detection limit of the method,precision and recovery rate of the added sample were measured. Results showed that in the conditions of ashing temperature of 700 ℃ and the atomization temperature of 2100 ℃,the absorbance of this method was highest,the sensitivity was best. In this condition,linear range of standard curve was 0 ~ 50 μg/L,detection limit of method was 0. 0436 μg/L,precision was 1. 11%~ 3. 86%,recovery rate of the added sample was 91. 5%~ 104. 5%. The method had the advantages of low detection limit,high sensitivity,simple operation and economical cost,was suitable for promotion in grassroots units.
作者
陈思伊
唐琼
庞洁
黄丽
CHEN Si-yi;TANG Qiong;PANG Jie;HUANG Li(Nanning Municipal Center for Disease Control and Prevention, Guangxi Nanning 530000, China)
出处
《广州化工》
CAS
2019年第17期106-108,共3页
GuangZhou Chemical Industry
关键词
镍
石墨炉原子吸收光谱法
灰化原子化温度
水质
nickel
graphite furnace atomic absorption spectrometry
ashing and atomization temperature
water
