The Mn recovery is over 80%, a new process of enriching and recovering Mn from low-grade manganese carbonate ore.

采用该工艺的锰回收率达80%以上，是一种从低品位碳酸锰矿富集回收锰的新工艺。

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With the increase of injection gas composition's enriching degree, the development indicators become better and the oil recovery enhanced.

④随着注入气组成富化度的增加，各项开发指标随之变好，原油采出程度随之增加。

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Content of Ni2+ in water was determined by atomic absorption spectrometry after separating and enriching with sulphdryl cotton. In this method, RSD was 2.3~2.5, and recovery was 99.8%~100.1%.

前言： 采用疏基棉分离富集技术，以火焰原子吸收光谱法测定了水中痕量镍元素的含量，相对标准偏差为2.3~2.5， 回收率为99.8%~100.1%，取得了比较满意的实验结果。

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