游离二氧化硅

石灰岩中游离二氧化硅化学物相分析方法的标准化研究

Standardization of Method for Chemical Phases Analysis of Free Silica in Limestone

红外光谱法定量测定石灰岩中游离二氧化硅

The Determination of Free Silica in limestone by the Use of Infrared SPectrometry

矿山呼吸性粉尘中游离二氧化硅的X射线衍射仪测定法

X-ray Diffraction Method to Determine Free Silica Content in Mine Respirable Dust

本文介绍了应用X射线衍射仪测定矿山呼吸性粉尘中游离二氧化硅含量的基本原理、实验条件以及操作过程、方法步骤等。

Basic principle , experiment condition , operating process , method and steps of X-ray diffraction method to determine free silica content of respirable dust in mines are introduced in this paper .

工业粉尘中游离二氧化硅及总硅量之测定

Methods of Determining Total Silica and Quartz in Industrial Dusts

煤尘（含游离二氧化硅10～20%）卫生标准的探讨

Study of Hygiene Standard of Coal Dust Containing 10-20 Percent Free SiO_2

红外分光光度法测定粉尘中游离二氧化硅的含量

Determination of free silicon dioxide in dust by infrared spectrophotometry

红外光谱法检测粉尘中游离二氧化硅的试验研究

Testing and Research for Free Silicon Dioxide in Dust by Infrared Spectrum Law

含游离二氧化硅粉尘累积肺作用值的应用

Application of the accumulated effect value of dust containing free silica on lung

游离二氧化硅间接测定法的研究

Indirect spectrophotometric determination of free silica in : dust

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。

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

目的探讨游离二氧化硅累积接触与尘肺累积发病的剂量反应关系。

Objective To study dose response relationship between cumulative exposure to silica and cumulative incidence of pneumoconiosis .

结果随肺内滞留粉尘、游离二氧化硅含量的增加，尘肺病变加重；

Results With increase in contents of dust and free silica detained in the lungs , silicosis exacerbated .

作业场所空气中微量呼吸性粉尘游离二氧化硅含量的X线衍射测定研究

Study on the determination in micro-amounts of free SiO _2 in respirable dust in the air of workplace by a method for XRD

目的研究金属矿工与煤工尘肺尸检肺内粉尘、游离二氧化硅及元素的含量。

Objective To study the contents of dust , free silica and metal elements in the lungs of metal and coal miners in autopsy .

本文对接触谷物粉尘的185名作业工人，进行健康检查和劳动卫生学调查.在现场测定308份样品中，原粮车间粉尘浓度高，游离二氧化硅含量13.4～38.5%。

The present paper provides the health examination result of 185 workers exposed to the grain dust and the investigation monitoring of the working-place .

本文对矿山粉尘和铸造粉尘的游离二氧化硅含量进行了红外分光光度法和焦磷酸重量法的对比测定。

Free silica in mining dust ( MD ) and in foundry dust ( FD ) was measured by both ultrared spectrophotometry and pyrophosphoric acid-weight .

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。

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.

本文调查了一个褐煤矿和402名井下工人，结果：煤尘中游离二氧化硅含量为2.4～6.6%；

A lignite mine and its 402 miners were studied . The average content of free silica in coal dust was found to be 2.4 ~ 6.6 % ;

相同期别的金属矿工与采煤工尘肺，肺内粉尘量前者低于后者，游离二氧化硅量二者基本接近；

Dust content in the lungs was less in metal miners than that in coal miners and that of free silica was basically equal in both of them .

结果表明，粉尘浓度和游离二氧化硅含量高者，钙化发生率也高；

The comparison of the materials taken from different mines showed that the higher the concentration of the dust and silica content , the higher the rate of calcification .

游离二氧化硅致肺组织纤维化机制十分复杂，涉及多种细胞及生物活性物质参与的炎症反应、免疫反应、异物反应、细胞毒作用等。

The mechanism of fibrosis caused by free silica particles involves a lot of cells and reactions including inflammatory reaction , immunological reaction , foreign body reaction and cell toxic action .

结论硅粉生产由于粉尘中游离二氧化硅含量高、粒度细、致肺纤维化作用强，是一个职业病危害极大的行业。

Conclusions High content of SiO2 and the tiny granule in the dust has strong effect on inducing the pulmonary fibrosis . Thus quartz powder processing was a high occupational hazard industry .

方法：依据《作业场所空气中有害物质监测的采样规范（GBZ159-2004）》对工作场所空气中总粉尘浓度和游离二氧化硅含量进行监测。

Methods : According to " hazardous substances in workplace air monitoring , sampling rule ( GBZ 159-2004 )" in the workplace air concentrations of total dust and free silica content monitoring .

体内实验表明，棕尘各实验组均可引起肺间质纤维化，其病变进展速度与游离二氧化硅含量有关。

The toxicity of worksite palm dust appeared to be most severe among those three . The experiment in vivo showed that palm dust could cause interstitial fibrosis of rat lung in each group .

方法：生产性粉尘样本来自上述3个企业，采用焦磷酸质量法测定粉尘中游离二氧化硅的含量，采用原子吸收光谱法和原子荧光光谱法测定粉尘中化学元素的含量。

The content of free silica in silica dust were determined by pyrophosphate quality method and the contents of chemical elements were assayed by atomic absorption spectrometry and atomic fluorescence spectrometry . Cohort was established basing on the three worksites .