ELTA萃取分离氨水反萃取原子吸收光谱法测定铸铁中的钼  

DETERMINATION OF MOLYBDENUM IN CAST IRON BY ATOMIC ABSORPTION SPECTROMETRY AFTER EXTRACTION WITH ELTA THEN BACK EXTRACTION WITH AQUEOUS AMMONIA

作　　者：顾正康[1] 陆忠娥[1] 陆雍华 童剑英[1] 杨爱琴 

机构地区：[1]苏州大学化学系,苏州215006

出　　处：《光谱学与光谱分析》1993年第2期67-70,共4页Spectroscopy and Spectral Analysis

摘　　要：本文介绍了利用ELTA为萃取剂,萃取分离铸铁中微量钼的条件以及采用1%(V/V)氨水进行反萃取后应用AAS测定水相中钼的分析方法。试验表明:钼在0～100μg/g浓度范围内呈良好线性关系,相关系数为0.9992。方法的相对误差为-3.31～-7.80%,相对标准偏差为3.39%～3.90%。A traces of molybdenum in cast iron were extracted with Ethyl n-laurylthioacetate (ELTA) into butylacetate, then back extraction with aqueous ammonia, and determined by atomic absorption spectrometry with air-acetylene flame. ELTA were obtained from author by organic synthesis. The molybdenum can be quantitatively extracted at 60%(V/V) solution of HCl, and quantitative back extracted at 1%(V/V) aqueous ammonia. Within the range of 0～100μg/g the concentrations of molybdenum versus absorbance exhibits a linear relationship, correlation coefficient of standard curve being 0.9992. Results of this method were as follows: the relative error was-3.31～-7.80% and relative standard deviation was 3.39～3.90%.

关 键 词：钼 原子吸收光谱法 ELTA 铸铁 

分 类 号：TG143[一般工业技术—材料科学与工程]