火焰原子吸收光度法测定高钛渣中的锰铬  

The Determination of Manganese,Chromium in High Titanium Slag by Flame Atomic Absorption Spectrum

作　　者：刘洪泉[1] 陈娟[1] 

机构地区：[1]昆明冶金研究院,云南昆明650031

出　　处：《云南冶金》2018年第1期63-67,共5页Yunnan Metallurgy

摘　　要：以硝酸-氢氟酸-高氯酸溶解样品,在盐酸介质里,用火焰原子吸收光度法分别测定锰和铬。测定铬时通过采用富燃焰和加入硫酸钠来提高灵敏度。锰、铬的标准曲线的线性范围均为0.00~10.00μg/mL。锰的加标回收率从98.68%~104.06%,铬的加标回收率98.44%~101.80%,加标回收良好。其变异系数为3.01%~6.74%,精密度良好。该方法线性关系好、准确度高、精密度好,适合用于测定高钛渣中的0.005%~1%的锰和铬。The nitric acid - hydrofluoric acid - perchloric acid is used to dissolve samples, in the hydrochloric acid medium; the flame atomic absorption spectrum is used to determine manganese and chromium separately. The fuel - rich flame and addition of sodium sul- fate is used in determination of chromium in order to increase its sensitivity. The average linearity range of the standard curve of manganese and chromium is 0. 00 - 10. 001xg/mL. The adding standard recovery rate of manganese is 98.68% -104. 06% , the adding standard recov- ery rate of chromium is 98.44% - 101.80% , the adding standard recovery rate is good. The variable coefficient is 3.01% - 6. 74%, and its precision degree is good. The method has good linear relation, high accuracy degree, good precision degree, which is appropriate for de- termination of 0. 005% -1% manganese and chromium in high titanium slag.

关 键 词：火焰原子吸收光度法 高钛渣 锰和铬 

分 类 号：O657.31[理学—分析化学]