Skaugset Nils Petter, Ellingsen Dag G, Notø Hilde, Jordbekken Lars, Thomassen Yngvar
Chemical and Biological Work Environment, National Institute of Occupational Health, PO Box 8149 DEP., 0033 Oslo, Norway;
Ann Occup Hyg. 2013 Oct;57(8):1054-64. doi: 10.1093/annhyg/met025. Epub 2013 Jun 22.
Intersampler field comparison of Respicon(®), 25-mm closed-face 'total dust' cassette (CFC), and IOM inhalable aerosol sampler was conducted in pot rooms at seven aluminium smelters. The aerosol mass and water-soluble fluoride were selected as airborne contaminants for the comparisons. The aerosol masses of 889 sample pairs of IOM and Respicon(®) inhalable aerosol sub-fraction, 165 of IOM and 25-mm CFC, and 194 of CFC and Respicon(®) thoracic aerosol sub-fraction were compared. The number of sample pairs for the comparison of water-soluble fluoride was 906, 170, and 195, respectively. The geometric mean aerosol mass collected with the inhalable Respicon(®) was 2.91 mg m(-3) compared with 3.38 mg m(-3) with the IOM. The overall ratio between IOM and Respicon(®) inhalable sub-fraction was 1.16 [95% confidence interval (CI) = 1.11-1.21] for aerosol mass and 1.13 (95% CI = 1.08-1.18) for water-soluble fluoride. The results indicate that Respicon(®) undersampled the aerosol mass and water-soluble fluoride in the inhalable sub-fraction compared with the IOM. The results indicated undersampling of the Respicon(®) at mass concentrations higher than 1.35 mg m(-3) and oversampling at lower mass concentrations. The overall ratio between aerosol mass collected with IOM and CFC was 4.19 (95% CI = 3.79-4.64) and 1.61 (95% CI = 1.51-1.72) for water-soluble fluoride. Thus, for this industry, a correction factor of 4.2 is suggested for the conversion of CFC to inhalable aerosol masses and a conversion factor of 1.6 for water-soluble fluoride if wall deposits in the CFC are included. CFC and thoracic Respicon(®) collected similar aerosol masses (ratio = 1.04; 95% CI = 0.97-1.12), whereas the ratio was 1.19 (95% CI = 1.11-1.28) for water-soluble fluoride. The variability of the exposure is substantial; thus, large data sets are required in sampler performance field comparisons.
在7家铝冶炼厂的电解车间对Respicon（®）、25毫米封闭面“总粉尘”采样盒（CFC）和IOM可吸入气溶胶采样器进行了采样器间现场比较。选择气溶胶质量和水溶性氟化物作为空气中污染物进行比较。比较了IOM与Respicon（®）可吸入气溶胶子分数的889对样本、IOM与25毫米CFC的165对样本以及CFC与Respicon（®）胸段气溶胶子分数的194对样本的气溶胶质量。水溶性氟化物比较的样本对数分别为906、170和195。Respicon（®）可吸入采样器收集的几何平均气溶胶质量为2.91毫克/立方米，而IOM为3.38毫克/立方米。IOM与Respicon（®）可吸入子分数之间气溶胶质量的总体比值为1.16[95%置信区间（CI）=1.11 - 1.21]，水溶性氟化物的总体比值为1.13（95%CI = 1.08 - 1.18）。结果表明，与IOM相比，Respicon（®）在可吸入子分数中对气溶胶质量和水溶性氟化物的采样不足。结果表明，Respicon（®）在质量浓度高于1.35毫克/立方米时采样不足，在较低质量浓度时采样过量。IOM与CFC收集的气溶胶质量总体比值为4.19（95%CI = 3.79 - 4.64），水溶性氟化物的总体比值为1.61（95%CI = 1.51 - 1.72）。因此，对于该行业，如果将CFC中的壁面沉积物包括在内，建议将CFC转换为可吸入气溶胶质量的校正因子为4.2，水溶性氟化物的转换因子为1.6。CFC与Respicon（®）胸段采样器收集的气溶胶质量相似（比值 = 1.04；95%CI = 0.97 - 1.12），而水溶性氟化物的比值为1.19（95%CI = 1.11 - 1.28）。暴露的变异性很大；因此，在采样器性能现场比较中需要大量数据集。
