The results showed the surface contamination produced in sample preparation and treatment can be eliminated if the sample was sputtered for enough time.
实验表明：样品经足够长时间的溅射，可以消除样品制备和处理过程中的表面污染，可以为其它高纯材料的检测提供可靠的科学依据。
The standard states that the citric acid-sodium nitrate treatment is the least hazardous for removal of free iron and other metallic contamination and light surface contamination.
该标准声明：柠檬酸-硝酸钠处理在去除游离铁合其他金属污染和轻的表面污染物时，危险性最低。
The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染，包括：尘土、油脂、来自钢铁加工的游离铁等等，可以影响到钝化膜的生成。
Compared with the prior hygrometer with a moisture sensitive sensor, the invention solves the problem of short service life of the sensor as no failure resulting from the surface contamination occurs.
与湿敏传感器的湿度计相比，由于不存在表面污染失效的情况，所以解决了传感器使用寿命短的问题。
Compared with the prior hygrometer with a moisture sensitive sensor, the invention solves the problem of short service life of the sensor as no failure resulting from the surface contamination occurs.
与湿敏传感器的湿度计相比，由于不存在表面污染失效的情况，所以解决了传感器使用寿命短的问题。
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