The free fluorin content in liquid multi-vitamin was quantitatively analyzed by using a simple potentiometric titration.

1、

In this paper, an application of fluorin-silicon rubber as sealing ring in certain Mini-Transformer is introduced.

设计了带内加强金属环的氟硅橡胶密封圈,并将其应用于某种小型变压器中, 适应了变压器密封及法兰的特殊要求.

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2、

Besides , alter-attapulgite treated by alkali cleaning had no evident improvement in fluorin removal.

碱洗改性对酿酒用水中氟离子的去除效果影响不显著.

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3、

Fluorin can avoid brown striation and whiten skins.

氟:能消除褐色斑,使皮肤变白.

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4、

Fluorin boric acid acidification technique has achieved intent which deep-depend expanding acidification-dispel block.

氟硼酸深部酸化工艺达到了深部防膨酸化解堵的目的.

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5、

It is concluded that fluorin is a good indication of the reconnaissance of volcanic porphyry deposit.

论证了氟的地球化学异常在火山-斑岩型锡矿床普查过程中具有良好的指示意义.

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6、

The structures and properties of activated carbon fibers were studied at fluorination before and after.

研究了活性炭纤维在氟化前后的结构与性能的变化.

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7、

Perfluorotriethylamine is fabricated through electrochemical fluorination of triethylamine in anhydrous hydrogen fluoride under a certain condition.

本文通过对无水氟化氢和三乙胺的混合溶液在一定条件下的电解氟化,制备全氟三乙胺.

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8、

Low cost 3, 4-difluoro nitrobenzene was prepared from 2, 4-dinitrochlorobenzene by two-step fluorination.

二硝基氯苯经二步氟化反应,制得低成本3, 4- 二氟硝基苯.

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9、

Development of electrochemical partial fluorination were introduced. The factor: effecting the selectivity of fluorination were reviewed.

简介了电化学选择氟化方法的发展以及最新进展,并着重介绍了影响选择性的因素.

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10、

The classification, synthesis and application of ionic liquids in fluorination were introduced in brief.

本文简要介绍了离子液体的分类、合成及其在氟化工艺中的应用.

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11、

Polyethylene glycols can be used as effective phase transfer catalyst in halogen exchange fluorination.

聚乙二醇可作为卤素交换氟化反应有效的相转移催化剂.

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12、

In this paper the main progress in synthesis methods of PFTHF as electrochemical fluorination are emphasized.

本文着重阐述了PFTHF的合成方法如电化学氟化法等的研究进展.

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13、

There are two methods for synthesis of the fluoroporphyrins: direct and indirect fluorination.

含氟卟啉合成方法分为直接氟化法和间接氟化法.

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14、

Surface fluorination, the new technics of POF cladding, was probed in this paper.

探索了PMMA聚合物光纤包层的新工艺-表面氟化技术的可行性.

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15、

Although all plants normally contain fluorine, the concentration varies greatly.

虽然在正常情况下,所有的植物都含氟, 其浓度变化很大.

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16、

The source and control of fluorine in edible betel nut.

食用槟榔;氟;来源;控制;卫生标准.

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17、

Contain fluorine toothpaste after all whether well or not?

到底含氟牙膏好不好?

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18、

The structure of floating multicavity mold for fluorine rubber was stated.

叙述了浮动式氟橡胶油封多腔模的结构.

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19、

It is a compound of aluminum, silica, and fluorine.

它是铝、硅和氟的化合物.

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20、

The fluorine does not accumulate indefinitely in the water.

氟不会在水里无限制地积累.

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