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为防止工人有机溶剂中毒,目前规定的是测定车间有机溶剂蒸气的浓度。但最近以测定个人接触浓度来计算其时间加权平均值特别受到重视。以前是用携带式活性碳管个人采样器测定,该法必需有电池和泵,重量可达500 g,因此不受欢迎;而且在8小时测定过程中要换电池和随时测定流量,加重了测定人员的负担;测定数据的误差,美国劳动安全研究所(NIOSH)认为可达±25%。最近美国3M公司发售一种“印有3M标记的3500型有机气体检测器”。是用塑料制作的,重量仅13克,直径4.5 cm,厚13 mm,可佩带在工人衣领上或胸前。检测器是由使气体起扩散作用的极微细的
To prevent workers from poisoning with organic solvents, the current requirement is to determine the concentration of organic solvent vapor in the workshop. However, the recent calculation of the time-weighted average of individual exposure concentrations has received particular attention. Previously used portable personal carbon nanotube sampler determination, the law must have a battery and pump, weighing up to 500 g, so unpopular; and in the 8-hour measurement process to change the battery and ready to measure the flow, aggravated the determination Personnel burden; Measurement data error, the United States Institute of Labor and Safety (NIOSH) that up to ± 25%. 3M recently marketed a “3M Marker Type 3500 organic gas detector.” Made of plastic, weighing only 13 grams, measuring 4.5 cm in diameter and 13 mm thick, can be worn on workers’ collars or on the chest. The detector is made of a very fine gas diffusion effect