摘要
建立了石墨炉原子吸收光谱法测定食盐中钡的方法,不需要对石墨管做任何处理,也无需对样品进行除盐处理,通过优化石墨炉升温程序,极大地改善了食盐样品中钡测定的灵敏度和峰形。钡在0.00~50.0μg/L浓度范围呈现良好的线性关系,相关系数优于0.999,检出限为0.650mg/kg(以称样量0.200g,定容至50 mL计算)。食盐样品钡加标回收率范围为81.3%~105%,相对标准偏差在8.9%以内。方法稳定可靠,准确度较高,适用于食盐中钡的测定。
A graphite furnace atomic absorption spectrometry(GF-AAS)method was developed for the determination of barium in table salt without any treatment on the graphite tube and sample desalinating,sensitivity and spectra of barium in salt were greatly improved by optimizing the graphite furnace heating program.Barium shows a good linear relationship in the range of 0.00-50.0μg/L,correlation coefficient is better than 0.999,and the detection limit is 0.650 mg/kg(calculated based on a weighing sample of0.200 g and a fixed volume of 50 mL).The spiked recovery range of barium in table salt samples is 81.3%-105.1%,and the relative standard deviation is within 8.9%.The method is stable,reliable and accurate,and it is suitable for the determination of barium in table salt.
作者
戴瑞平
陈世坤
DAI Ruiping;CHEN Shikun(Jiangxi Institute for Food Control,Nanchang,Jiangxi 330001,China;School of Public Health,Nanchang University,Nanchang,Jiangxi 330001,China)
出处
《中国无机分析化学》
CAS
2020年第6期58-63,共6页
Chinese Journal of Inorganic Analytical Chemistry
关键词
石墨炉原子吸收光谱法
食盐
钡
graphite furnace atomic absorption spectrometry
table salt
barium
