The trace phenol and impurity were removed from the bisphenol A with active white soil as dephenolizer, and its rate is more than 99%.
用活性白土做脱酚剂去除双酚A中的微量苯酚及其杂质，其去除率可达99％以上。
The trace impurity in product has been determined by A A S. it is important to improve process.
还用原子吸收光谱法测定了产品中微量杂质的含量，对改进生产工艺具有指导作用。
Determining trace impurity element of the standard europium oxide by the standard addition method. So the errors owing to neglecting the impurity in the standard are eliminated.
用标准加入法测出氧化铕基准中的微量杂质元素，消除了由于忽略基准中的杂质元素的含量给分析测定带来的误差。
Chemical products often need coned of their trace iron contents as impurity.
化工产品大多需控制其痕量杂质铁含量。
A ICP-MS method for the determination of 5 trace impurity elements of copper, titanium, zinc, manganese and cobalt in aluminum has been developed in this paper.
用标准加入法以电感耦合等离子体质谱测定金属中铝、铜、钛、锌、锰、钴，建立了一种简便、快速测定金属铝中杂质元素的分析方法。
Chemical products often need control of their trace iron contents as impurity.
化工产品大多需控制其痕量杂质铁含量。
As beautiful bright Nordic scenery, always so pure, without a trace of impurity, such a wardrobe, taking inspiration from northern coastal storm season.
如清丽明艳的北欧胜景，总是那么纯净、不含一丝杂质，这样的一款衣柜，灵感正来自于北欧海滨的风雪季节。
As beautiful bright Nordic scenery, always so pure, without a trace of impurity, such a wardrobe, taking inspiration from northern coastal storm season.
如清丽明艳的北欧胜景，总是那么纯净、不含一丝杂质，这样的一款衣柜，灵感正来自于北欧海滨的风雪季节。
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