组份复杂的矿物中低含量铝的化学测定,颇为困难。迄今常用的几种显色剂,都不够理想。P·Pakalns推荐之铬天青S比色法,虽然重现性与选择性较佳,但必须进行分离,方可适用于包头矿中铝的测定。对包头矿而言,常见的分离手段都未能用简便的操作而达到满意的分离效果。Gunthorkraft等提出在强酸溶液中用铜铁试剂—氯仿萃取法分离矿石中之杂质,然后 The chemical determination of low levels of aluminum in complex minerals is quite difficult. So far, several commonly used developer, are not ideal. The chrome azure S colorimetric method recommended by P. Pakalns, although reproducible and selective, should be separated before it can be applied to the determination of aluminum in Baotou Mine. For Baotou mine, common separation methods failed to achieve satisfactory separation effect with simple operation. Gunthorkraft proposed in a strong acid solution with copper and iron reagent - chloroform extraction of impurities in the ore separation, and then