铁路隧道施工粉尘中游离二氧化硅含量测定方法对比分析  

Comparative Analysis of Determination Methods for Free Silica Content in Dust during Railway Tunnel Construction

作　　者：姜坤 吴凯 赵泽亚 刘珺 JIANG Kun;WU Kai;ZHAO Zeya;LIU Jun(Energy Saving&Environmental Protection&Occupational Safety and Health Research Institute,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China;Safety Supervision Office,China Railway Shenyang Bureau Group Co.,Ltd.,Shenyang Liaoning 110001,China)

机构地区：[1]中国铁道科学研究院集团有限公司节能环保劳卫研究所,北京100081 [2]中国铁路沈阳局集团有限公司安全监察室,辽宁沈阳110001

出　　处：《铁路节能环保与安全卫生》2024年第5期39-43,共5页Railway Energy Saving & Environmental Protection & Occupational Safety and Health

基　　金：中国铁道科学研究院集团有限公司科研开发基金项目(2023YJ285)。

摘　　要：依据标准《工作场所空气中粉尘测定第4部分:游离二氧化硅含量》(GBZ/T 192.4—2007),通过现场调研方式,在确认铁路隧道施工样品主要来源及采样方法选择适用性基础上,观察实验过程,对比分析焦磷酸法与红外分光光度法分别测定粉尘样品中游离二氧化硅含量的测定结果。分析得出影响焦磷酸法测定结果的主要因素为消解温度,影响红外分光光度法主要因素为实验室湿度、称样量、粉尘颜色,从而得出目前在铁路隧道施工粉尘中游离二氧化硅含量的测定方法中焦磷酸法优于红外分光光度法。According to the standard"Determination of dust in the air of workplace-part 4:Content of free silica in dust"(GBZ/T 192.4—2007),this paper observed the experimental process through on-the-spot investigation and confirmed the main sources of railway tunnel construction samples and the applicability of sampling methods,and compared and analyzed the determination results of free silica content in dust samples by pyrophosphoric acid method and infrared spectrophotometry respectively.It is analyzed that the main factors affecting the determination results of pyrophosphoric acid method are digestion temperature,and the main factors affecting infrared spectrophotometry are laboratory humidity,sample weight and dust color,so it is concluded that pyrophosphoric acid method is better than infrared spectrophotometry in the determination of free silica content in railway tunnel construction dust at present.

关 键 词：游离二氧化硅 焦磷酸法 红外分光光度法 粉尘采样 

分 类 号：R134.4[医药卫生—劳动卫生]