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目的通过正己烷实时监测系统,建立工作场所正己烷危害预防控制模型。方法利用传感器网络技术实现对工作场所正己烷的实时监测,通过风险评价,建立正己烷职业危害预防控制模型。结果正己烷实时监测系统的硬件包括数据采集器、数据传输及接收单元,软件系统由系统软件和手机APP软件组成。该系统可实时检测和动态观察工作场所空气中的正己烷水平和环境条件参数(温度、湿度、光强和风速),可直接导出正己烷的时间-浓度曲线图,分析正己烷水平与各种监测指标的关联性,并可对正己烷危害进行风险评价和预测。与国家标准方法比较,8个正己烷样品的检测结果相对误差范围为-3.2%~4.7%,含多种成分的3种正己烷混合有机溶剂的检测结果相对误差分别为-2.3%、3.8%和4.4%。结论正己烷实时监测系统可应用在企业的日常预防控制工作中,有利于做好职业性正己烷危害防治工作。
Objective To establish a n-hexane hazard prevention and control model in the workplace through a n-hexane real-time monitoring system. Methods Real-time monitoring of n-hexane in the workplace was implemented by using sensor network technology. Through risk assessment, a model of occupational hazard prevention and control of n-hexane was established. Results The n-hexane real-time monitoring system hardware includes data acquisition unit, data transmission and receiving unit, and the software system consists of system software and mobile APP software. The system detects and dynamically monitors n-hexane levels and ambient conditions (temperature, humidity, light intensity, and wind speed) in the workplace air in real time to directly derive the time-concentration profile of n-hexane and analyze n-hexane levels against various Monitor the relevance of the indicators and conduct a risk assessment and prediction of n-hexane hazards. Compared with the national standard method, the relative error of the detection results of eight n-hexane samples ranged from -3.2% to 4.7%. The relative errors of the detection results of the three n-hexane mixed organic solvents with various components were -2.3%, 3.8% And 4.4%. Conclusion The real-time monitoring system of n-hexane can be used in the routine prevention and control of enterprises, which is good for the prevention and control of occupational n-hexane.