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References in periodicals archive ?
This could be attributed to the penetrating of the catalyst particles into the interspace of glass fiber filter during the dip-coating process, which decreases the emission intensity what can be detected.
In the ultrafine size-range both the synthetic fiber filter #2 and the nano-fiber filter #4 showed higher enhanced efficiencies than the glass fiber filter #3 did.
For prefiltration of samples, a glass fiber filter gives better results than filters with either 5-mm or 20-mm pores.
Inside the filter holder are three nylon filters sandwiching a single glass fiber filter on which the chromaffin cells are located.
TABLE 1 Endotoxin Results for Each Sampling Method Sampling Method Run 1 Range (EUs/m3) Mean (EUs/m3) SD CV Impinger 115-1700 472 691 1.46 Glass fiber filter 42-81 60 17.6 0.29 Polycarbonate filter 4-34 16 15.8 0.99 Sampling Method Run 2 Range (EUs/m3) Mean (EUs/m3) SD CV Impinger 8-46 29 13.6 0.47 Glass fiber filter 4-29 14 9.6 0.68 Polycarbonate filter 1-6 3 2.17 0.72 TABLE 2 Results of the Spearman Rank Order Correlation Test Method Impinger GF Filter PC Filter Impinger (n = 10) 1.00 0.927 (a) 0.552 Glass fiber filter (n = 10) 0.927 (a) 1.00 0.539 Polycarbonate filter (n = 10) 0.552 0.539 1.00 (a) Significant at the .01 level (two-tailed).
After sampling, both glass fiber filter and cartridge were Soxhlet extracted with a mixed solvent (n-hexane and dichloromethane, v:v = 1:1,500 mL each) for 24 hr.