摘要
目的研制检测工作场所粉尘中游离二氧化硅水平的前处理自动化检测技术。方法采用石墨控制消解温度、消解液在线稀释和基于监测的过滤终点识别技术,结合多通道同步测定的方式,研制了测定工作场所粉尘中游离二氧化硅水平的全自动前处理工作站。结果采用全自动前处理工作站对3家单位生产的14种游离二氧化硅标准样品进行消解和过滤后,采用焦磷酸法检测,结果显示,高、中、低水平二氧化硅标准样品测定结果范围分别为66.5%~84.8%、40.0%~44.5%和2.1%~24.8%,平均相对标准偏差分别为3.9%、1.4%和1.5%。结论全自动前处理工作站测定粉尘中游离二氧化硅的结果均符合要求,能够有效替代焦磷酸法测定工作场所粉尘中游离二氧化硅水平中的手工消解和过滤过程,实现粉尘中游离二氧化硅水平的快速检测。
Objective To investigate an automated pretreatment technology for detecting levels of free silica in workplace dust.Methods An fully automated pretreatment workstation for detecting free silica levels in workplace dust was developed by integrating graphite-controlled digestion temperature,online-controlled dilution of digestion solutions,and filtration endpoint recognition based on monitoring technology,combined with multi-channel synchronous measurements.Results The fully automatic pretreatment workstation was used to digest and filter 14 standard samples of free silica produced by three institutions,and then detected by pyrophosphate method.The result range of high-,medium-,and low-level free silica standard samples detection was 66.5%-84.8%,40.0%-44.5%,and 2.1%-24.8%,respectively.The mean relative standard deviations were 3.9%,1.4%and 1.5%.Conclusion The fully automated pretreatment workstation produced results that met relevant requirements.It can effectively replace the manual digestion and filtration steps of the pyrophosphate method to measure free silica levels in workplace dust and enable rapid detection of free silica in dust samples.
作者
吴健
郑玉桥
罗梦
张梦萍
黄钧宜
沈菲
张锋
傅胜
陈学磊
霍宗利
吴邦华
WU Jian;ZHENG Yuqiao;LUO Meng;ZHANG Mengping;HUANG Junyi;SHEN Fei;ZHANG Feng;FU Sheng;CHEN Xuelei;HUO Zongli;WU Banghua(Jiangsu Provincial Center for Disease Control and Prevention(Jiangsu Provincial Academy of Preventive Medicine),Nanjing,Jiangsu 210009,China;不详)
出处
《中国职业医学》
2025年第4期455-459,共5页
China Occupational Medicine
关键词
粉尘
游离二氧化硅
焦磷酸法
消解
过滤
前处理
全自动
工作站
Dust
Free silica
Pyrophosphate method
Digestion
Filtration
Pretreatment
Automatic
Workstation
