Measurement Precision with the Coal Mine Dust Personal Sampler
Measurement Precision with the Coal Mine Dust Personal Sampler
复制标题
煤矿粉尘个人采样器的测量精度
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
K. Suppers
中科院分区：
文献类型：
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作者：
J. Kogut;T. Tomb;P. Parobeck;A. J. Gero;K. Suppers
摘要本研究的目的是量化煤矿粉尘浓度测量的精度与国家的最先进的重力技术和采样器结合流量控制技术。使用一个专门设计的便携式粉尘室，在一个地下煤矿进行了22次试验。每个测试包括收集16个同时粉尘样品，使用16个煤矿粉尘采样器单元对称地安装在一个具有中央入口的容器中。在同一实验室中，在暴露前后对滤尘胶囊进行称重，记录暴露前和暴露后的重量，精确至微克（0.001 mg）。试验中观察到的平均增重范围为62 μg（在325分钟采样期内采集）至6750 μg（在320分钟内采集）。基于加权最小二乘，重复测量回归分析，记录的体重增加的误差标准差的点估计值为9.1 μg，单侧95%置信上限（UCL）为...
Abstract The purpose of this study was to quantify the precision of coal mine dust concentration measurements made with state-of-the-art gravimetric techniques and samplers incorporating flow control technology. Using a specially designed, portable dust chamber, 22 tests were conducted in an underground coal mine. Each test consisted of collecting 16 simultaneous dust samples using 16 coal mine dust sampler units symmetrically mounted in a container with a central inlet. Dust filter capsules were weighed in the same laboratory before and after exposure, with preexposure and postexposure weights recorded to the nearest microgram (0.001 mg). The average weight gain observed within tests ranged from 62 μg, collected over a 325-minute sampling period, to 6750 μg, collected over 320 minutes. Based on a weighted least-squares, repeated measures regression analysis, a point estimate for the standard deviation of error in recorded weight gain is 9.1 μg, with an upper one-tailed 95 percent confidence limit (UCL) o...