利用基体改进效应—无火焰原子吸收测定矿石中微量镓

关于矿石中微量镓的测定方法,以前一般采用化学比色法或光谱法。比色法其灵敏度较高,但分析手续冗长,且取样量较多,不宜于一般单矿物中镓的测定。近年来,随着原子吸收光谱分析技术的发展,有关镓的火焰及无火焰的测定已有所报导,以萃取分离的方法,基本上解决了单矿物样少

Determination of Ga in Rocks by Flameless AAS Using Matrix Correction

The matrix correction is suggested for determining Ga by flameless aas. The background is corrected by adding lmg/ml Ni using D2 lamp in 2 % nitric acid medium. The sensitivity of this method is 8.8 × 10-2g/1% Its C. V. for sample containing 0.02ppm of Ga is 1.81%(n=11).The re- coveries obtained by addition of standard Ga-solution are over 90 % . the mea- surable concentration range is O.OOOx-0.OOx % Ga.