求翻译：用无水乙醇清洗三次除去有机物，再用1：1的盐酸清洗二次，二氧化硅矿物铁含量已低于0.01%，可以看做纯二氧化硅，粒度分布在200-325目。是什么意思？

Washed three times with anhydrous ethanol to remove organic matter, 1:1 hydrochloric acid and then washed twice, silica mineral iron content is less than 0.01%, can be seen as pure silica, particle size distribution in the 200-325 mesh.

There is no water used for washing 3 times ethanol removes organic matter, and re-use of hydrochloric acid washing 2 1:1, 2 silica minerals iron content has been less than 0.01 per cent, 2 can be seen as pure silica, particle size distribution in 200 - 325.

Cleans three times with the absolute ethyl alcohol except the organic matter, again uses 1:1 hydrochloric acid to clean two times, the silicon dioxide mineral iron content has been lower than 0.01%, may consider as the pure silicon dioxide, the grain-size distribution in 200-325 item.

Cleaning three times to remove organic compounds with anhydrous ethanol, then wash with 1:1 hydrochloride secondary, silica mineral iron content is less than 0.01%, can be seen as pure silicon dioxide, particle size distribution in 200-325.

Wash for three times and remove organic matter with nonaqueous ethanol, and then use hydrochloric acid for 1:1 to wash for twice, two has oxidized the silicon mineral iron content and has already been lower than 0.01%, can regard as and oxidize silicons two times purely, the granularity is distribut