free sulfur dioxide

The using quantity of free sulfur dioxide was regulated in line with different pH value of crude wine so that the aim of using sulfur dioxide against erosion and oxidation could be achieved.

控制葡萄酒陈酿时原酒品质,其主要影响因素为原酒的pH值和二氧化硫的用量,根据原酒的不同pH值,对游离二氧化硫的用量加以调节,达到二氧化硫防腐、抗氧化的作用。

Free silica in geological exploration dust is measured by both Xray diffraction and pyrophosphoric acid methods.

对粉尘中游离二氧化硅含量进行了X线衍射法和焦磷酸消化法的对比测定。

A method for chemical phase analysis of free silica in limestone was discussed in this paper.

介绍了石灰岩中游离二氧化硅的化学物相分析方法。

This investigation is to analyse the free SiO 2 in rocks and dust by a fluoride-ion selective electrode(F-I.

采用焦磷酸分离岩石及粉尘中的游离二氧化硅 ,再用氢氟酸—饱和氯化钾将分离出来的游离二氧化硅溶解 ,使硅形成K2 SiF6沉淀 。

The sample decomposition method in analysis of free SiO 2 in rocks, minerals and dusts was improved.

改进了游离二氧化硅 (fSiO2 )测定中试样的分解方法 ,采用硫 -磷混酸替代单独使用磷酸分解试样 ,防止了焦磷酸盐的形成 ,同时 ,氟硼酸对fSiO2 的溶解率符合测定要求。

It is already determined that free silicon dioxide for dust not only is the main causeation for silicosis,but also is the major targets or q.

我国接触二氧化硅粉尘作业人员较多,矽肺病患者数字较大,因此,加强对粉尘中游离二氧化硅含量的检测是一件非常重要和紧迫的工作。

An effective method of determination of free silicon dioxide in dust by infrared spectrophotometry was established.

建立一种有效的红外分光光度法测定粉尘中游离二氧化硅含量,并对样品处理和曲线绘制方法进行了改进。

Chemical analysis of limestons for free silica

GB/T14840-1993石灰岩中游离二氧化硅化学分析方法

DETERMINATION OF FREE SILICON DIOXIDE IN DUST BY INFRARED SPECTROPHOTOMETRY

红外分光光度法测定粉尘中游离二氧化硅的含量

dioxide polysilicon isolation

二氧化硅 多晶硅隔离

Preparation of Thin SiO_2 Films from Polysilane Coatings Using Oxygen Plasma Method;

氧等离子体处理聚硅烷涂层制备二氧化硅薄膜

Study on Modified Silica Nanoparticle－Anionic Waterborne Polyurethane Composite;

改性纳米二氧化硅—阴离子水性聚氨酯复合研究

Defects in silica glass irradiated with high energy Fe ions

高能铁离子辐照二氧化硅玻璃产生的缺陷研究

Oxidative desulfurization of diesel oil over Ag-modified mesoporous HPW/SiO_2 catalyst

银离子修饰的介孔磷钨酸/二氧化硅催化剂氧化脱硫性能研究(英文)

full isolation by porous oxidized silicon

多孔氧化硅完全隔离

Pervaporation performances of polydimethylsiloxane membranes for separating dimethyl carbonate/methanol mixtures

聚二甲基硅氧烷膜分离甲醇/碳酸二甲酯混合物的渗透汽化研究

The free hydroxyl ion is involved in a further reaction with the silica network.

游离的氢氧离子会进一步和硅氧网络反应。

The Study of the Deposition of SiO_2 Films with RF Cold Plasma at Atmospheric-pressure;

常压射频低温等离子体增强化学气相沉积二氧化硅薄膜的研究

Silica-on-Silicon Array Waveguides Gratings;

硅基二氧化硅型阵列波导光栅的研制

Modification of Porous Silica Antireflective Coatings with Fluorine-Containing Organosilicon

含氟有机硅改性多孔二氧化硅减反膜

Study on effect of porous silica prepared from wollastonite as reinforcer in silastic

硅灰石制多孔二氧化硅在硅橡胶中的应用研究

Determination of silicon oxide in silica fume by molybdosilicate yellow spectrophotometry

硅钼黄分光光度法测定硅微粉中二氧化硅

Preparation and H_2 Separation Research of Ethylene-Modified Microporous Silica Membranes;

乙烯基修饰的微孔二氧化硅膜制备及氢气分离研究

Fabrication of Ag Nanotube and Nanoring by SiO_2 Assistant Phase-separation;

二氧化硅辅助相分离法制备银纳米管和银纳米环

Study on the Structure and Growth Mechanism of Silica Anion Magic Cluster;

二氧化硅负离子幻数团簇结构及增长机理的研究