空气──乙炔火焰原子吸收测定钙时氯化镧增感效应的影响  

Enhancing effect of LaCl_3 on atomic Absorption spectrometry of calcium using air─acetrylene flame

作　　者：于惠芬[1] 李琼昆 李国霞 

机构地区：[1]长春师范学院化学系,长春130032

出　　处：《长春师范学院学报》1999年第2期44-47,共4页Journal of Changchun Teachers Coliege

摘　　要：用空气—乙炔火焰原子吸收测钙时灵敏度较低干扰严重．通常用一氧化二氮—乙炔火焰进行测定．为此我们研究了ＬａＣｌ３对空气—乙炔火焰测定钙的增感效应，结果表明，在０．１％（Ｖ／Ｖ）ＬａＣｌ３存在下，钙的测定灵敏度提高约４０％，并对某些干扰有一定的抑制作用．因而可选用Ｏ．１％ＬａＣｌ３为空气—乙炔火焰原子吸收测定钙的增感剂，并测定了中草药中的钙，结果令人满意。Enhancing effect of LaCl3 in atomic absorption spectrometry using air-acety lene flame for the determination of calcium was studied. In the presence of 0.1 % (V/V) LaCl3 the atomic absorption signal of calcium is increased by about 40%, the straight pavt of calibration curves is spread. and the Inter ferences ofsome foreignions are sup-pressed partly. The results obtained for artifical herb samples are satifactory. Themechanism of the enhancing eftect was xplored preliminarily.

关 键 词：增感剂 中草药 钙 火焰原子吸收法 

分 类 号：O614.33[理学—无机化学]