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99.7%

99.7%

99.7%

99.7%

2

Then the zinc hydroxide is calcined to high-grade zinc oxide that the content of zinc oxide is 99 . 7% and the processes is simple .

采用该工艺产出的高等级氧化锌的氧化锌含量达到 99.7%，并且整个工艺过程简单。

3

Results : The quality of this preparation was stable . The average recovery was 99. 7%, and RSD was 0. 64%.

结果：本品制剂质量稳定，用 HPLC 法测定含量，平均回收率为 99.7%，重复性试验 RSD 为 0 .

4

Results show that purity(as mass fraction)of acetone can reach 99 . 7% .

结果表明，采用本工艺可得质量分数为 99.7%的丙酮。

6

By this method , 4 , 4' -dibromobiphenyi was synthesized with purity of 99. 7% and yield of 84. 6%.

得到产品纯度 99.7%，收率 84.6%；比传统方法降低了成本，操作容易，废液易于回收和利用。

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