Performance of prototype high-flow inhalable dust sampler in a livestock production facility.
Performance of prototype high-flow inhalable dust sampler in a livestock production facility.
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DOI：
10.1080/15459624.2016.1240872
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发表时间：
2017-05
影响因子：
2
通讯作者：
Volckens J
中科院分区：
文献类型：
--
作者：
Anthony TR;Cai C;Mehaffy J;Sleeth D;Volckens J
设计了一种大流量可吸入采样器，其工作流量可达10 L/分钟，通过计算机模拟和风洞实验进行了验证，并在现场进行了评估。该样机采样器与IOM(基准标准采样器)一起部署在一栋猪分娩楼内，以检验其在评估可吸入颗粒物和内毒素浓度方面的采样性能。在三个月的时间里，19天24小时地部署了成对的采样器。在每个采样日，将成对的采样器部署在三个固定位置，并对数据进行分析，以确定一致性并检查这些采样器测量的浓度之间的系统偏差。分析了36个配对的重量样本；两个采样器之间的浓度之间发现了不显著的、不显著的差异(p=0.16；平均差异0.03 mg/m~3)。有44对样本可用于内毒素分析，并发现内毒素浓度存在显著差异(p=0.001)：原型取样器的内毒素平均比IOM样本多120EU/m~3。由于对相同重量的样品进行了内毒素含量分析，因此内毒素的差异可能归因于内毒素提取的不同。样机的一次性聚碳酸酯薄膜胶囊在1小时的提取过程中包括在过滤器中，而IOM的内部塑料盒需要清洗程序，容易产生灰尘损失。使用遵循此漂洗程序的标准塑料IOM插入物测量的内毒素浓度可能低估了真实的内毒素暴露浓度。研究中的最高浓度(1.55毫克/立方米重量，2328EU/立方米内毒素)低于其他农业或工业环境。未来的工作应该探索原型采样器在更多沙尘环境中的性能，在这种环境中，浓度接近未另行规定的颗粒物(PNOS)10毫克/立方米的限制，包括将原型用作个人采样器。
A high-flow inhalable sampler, designed for operational flow rates up to 10 L/min using computer simulations and examined in wind tunnel experiments, was evaluated in the field. This prototype sampler was deployed in collocation with an IOM (the benchmark standard sampler) in a swine farrowing building to examine the sampling performance for assessing concentrations of inhalable particulate mass and endotoxin. Paired samplers were deployed for 24-hours on 19 days over a three-month period. On each sampling day, the paired samplers were deployed at three fixed locations and data were analyzed to identify agreement and to examine systematic biases between concentrations measured by these samplers. Thirty-six paired gravimetric samples were analyzed; insignificant, unsubstantial differences between concentrations were identified between the two samplers (p=0.16; mean difference 0.03 mg/m3). Forty-four paired samples were available for endotoxin analysis, and a significant (p=0.001) difference in endotoxin concentration was identified: the prototype sampler, on average, had 120 EU/m3 more endotoxin than did the IOM samples. Since the same gravimetric samples were analyzed for endotoxin content, the endotoxin difference is likely attributable to differences in endotoxin extraction. The prototype’s disposable thin-film polycarbonate capsule was included with the filter in the 1-hour extraction procedure while the internal plastic cassette of the IOM required a rinse procedure that is susceptible to dust losses. Endotoxin concentrations measured with standard plastic IOM inserts that follow this rinsing procedure may underestimate the true endotoxin exposure concentrations. The maximum concentrations in the study (1.55 mg/m3 gravimetric, 2328 EU/m3 endotoxin) were lower than other agricultural or industrial environments. Future work should explore the performance of the prototype sampler in dustier environments, where concentrations approach particulates not otherwise specified (PNOS) limits of 10 mg/m3, including using the prototype as a personal sampler.
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影响因子：
2
作者：
Anthony TR;Sleeth D;Volckens J
通讯作者：
Volckens J
影响因子：
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作者：
Gorner, Peter;Simon, Xavier;Witschger, Olivier
通讯作者：
Witschger, Olivier
影响因子：
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作者：
Lidén, G;Bergman, G
通讯作者：
Bergman, G
DOI：
10.1080/15298660008984550
发表时间：
2000-05-01
期刊：
AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL
影响因子：
--
作者：
Aizenberg, V;Grinshpun, SA;Baron, PA
通讯作者：
Baron, PA
影响因子：
--
作者：
Koehler, Kirsten A.;Anthony, T. Renee;Volckens, John
通讯作者：
Volckens, John