焦磷酸法测定粉尘中游离二氧化硅含量的操作要点及注意事项  被引量:7

Operation points and precautions of pyrophosphoric acid method for free silica content determination in dust

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作  者:林侃[1] 郑申西[1] 李一丹[1] LIN Kan;ZHENG Shen-xi;LI Yi-dan(Fuzhou City Center for Disease Control and Prevention,Fuzhou,Fujian,350004,China;不详)

机构地区:[1]福州市疾病预防控制中心,福建福州350004

出  处:《预防医学论坛》2020年第10期780-782,786,共4页Preventive Medicine Tribune

摘  要:目的归纳总结焦磷酸法测定粉尘中游离二氧化硅含量的实验操作和注意事项,以规范实验操作。方法2019年7~12月,使用GBZ/T 192.4-2007的焦磷酸法对福州地区工作场所空气中粉尘中游离二氧化硅含量进行抽查,同时测定质控样。结果总结了焦磷酸的制备、样品的预处理、样品的焦磷酸加热处理、热过滤和沉淀洗涤等步骤的操作要点,质控样检测结果符合参考值范围。结论监测机构应当尽量不偏离国家推荐标准方法,按照注意事项严格操作,取得检测资质。Objective To summarize the experimental operation points and precautions of pyrophosphoric acid method for determination of free silica content in dust,so as to standardize the experimental operation.Methods From July to December 2019,the pyrophosphoric acid method of GBZ/T 192.4-2007was used to spot check the free silica content in the dust of workplace in Fuzhou area,and the quality control samples were determined at the same time.Results The operation points of pyrophosphoric acid preparation,sample pretreatment,pyrophosphoric acid heating treatment,thermal filtration and precipitation washing were summarized.The determination results of quality control samples were in accordance with the reference value range.Conclusion Monitoring institutions shall try not to deviate from the national recommended standard methods,operate strictly according to the precautions,and obtain the testing qualification.

关 键 词:粉尘 游离二氧化硅含量测定 焦磷酸法 操作要点 注意事项 

分 类 号:R135.2[医药卫生—劳动卫生]

 

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