摘要
本文研究了石墨炉原子吸收光谱法测铝时各种氯化物的干扰及硝酸钙的增感作用。NaCl、KCl、FeCl_3、CuCl_2对铝的测定产生负干扰,这种干扰来自气相中铝和氯的结合;MgCl_2和CaCl_2对铝产生正干扰,其干扰来自它们分解出的氧物化对铝的增感作用。硝酸钙不仅对铝产生增感作用,而且也提高铝的最高允许灰化温度,降低原子化温度,同时也增强抗干扰能力。本文还利用钙的增感作用直接测定了河水及地下水中的痕量铝,结果满意。
The use of Ca (NO_3)_2 as matrix modifier can increase ashing temperature and decrease atomization temperature. The mechanisms of chloride interference and enhancement of sensitivity are proposed. Trace amount of Al in river water and underground water have been determined with Ca (NO_3)_2 as matrix modifier.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第8期692-696,共5页
Chinese Journal of Analytical Chemistry
