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以我国中南地区几种土壤和土壤锰结核为材料，比较了高梯度磁分选（HGMS）仪与5mol·L-1NaOH溶液对土壤铁锰氧化物的浓缩效果。结果表明：（1）以1：1型高岭石为主的土样，经5mol·L-1NaOH溶液处理后,其氧化铁浓缩倍数高于HGMS处理后的样品；以2：1型层状硅酸盐矿物为主的土壤浓缩倍数则相反。（2）HGMS处理浓缩土样锰结核中的锰氧化物，其浓缩倍数比5mol·L-1NaOH溶液处理的低；但前者锂硬锰矿的X射线衍射峰却更强，这与它们的浓缩机制不同有关。
Based on the manganese nodules from several soils and soils in central and southern China, the enrichment effects of HGMS and 5 mol·L-1 NaOH on soil Fe-Mn oxides were compared. The results showed that: (1) The concentration of iron oxide in the 1: 1 type kaolinite was higher than that of the HGMS after treated by 5mol·L-1 NaOH solution. The 2: 1 layered Silicate mineral-based soil concentration multiples of the opposite. (2) The concentration of manganese oxide in concentrated sample of manganese nodules was lower than that of 5mol·L-1NaOH solution in HGMS treatment. However, the XRD peaks of lithium-manganese ore in the former were stronger than the others, Different related.