能够有效分离有关物质，控制总杂质不超过1.5%。

The total amount of related substances was controlled no more than 1.5%.

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膜分离对硫氰酸钠中的总杂质、硫酸根和含铁杂质的去除率约为80%，97%，60%。

About 80%, 97% of total impurities and sulfates and 60% of iron contained impurities were rejected by the membrane process.

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通过对苯酚原料的GC—MS分析和对原料与产品的UVT及总酮量分析，定性地说明了影响UVT值达标的主要杂质为沸点高于苯酚的酮类化合物。

The impurities affecting the index of UVT of phenol were found by GC MS analyses and total ketones analyses of phenol, which are mainly ketones compounds with higher boiling than of phenol.

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