Field evaluation of a new particle concentrator- electrostatic precipitator system for measuring chemical and toxicological properties of particulate matter

Table 1 Particle number and mass concentrations measured during sampling and sample distribution for chemical analysis

	Particle number		PM_2.5 mass concentration
Test No.	Ambient concentration (particles/cm³)	ESP Penetration (%)^a	Ambient concentration (μg/m³)	Enriched concentration (μg/m³)	Enrichment Factor (EF)^b	Chemical analysis
1	16600 ± 2900	3.5	23.2	370.8
2	21600 ± 5500	3.6	26.3	665.5	25.3	ICP-MS
3	14600 ± 3000	4.7	46.5	940.3	20.2	GC-MS
4	10400 ± 2900	5.0	29.5	827.1	28.0	ICP-MS
5	15900 ± 5300	3.5	11.9	252.8	21.2	GC-MS
6	21600 ± 9200	2.6	29.3	310.0	10.6	ICP-MS
7	12200 ± 4800	3.8	18.9	453.0	24.0	GC-MS
8	30800 ± 6200	3.1	19.0	323.0	17.0	IC
9	14000 ± 3000	9.6	17.0	463.2	27.2	GC-MS
10	15000 ± 4000	7.7	16.5	490.6	29.7	GC-MS
11	15000 ± 5000	9.6	17.7	265.9	15.0	GC-MS
12	14000 ± 3000	7.4	20.7	228.6	11.0	GC-MS
13	13000 ± 3000	8.9	14.5	252.5	17.4	GC-MS
14	12000 ± 3000	8.7	16.5	289.8	17.6	GC-MS

^a ESP penetration was determined as the ratio of particle number concentration penetrating ESP to the enriched particle number concentration before ESP.
^b EF (Enrichment factor) was determined as the ratio of enriched PM_2.5 mass concentration from reference samplers to ambient PM_2.5 mass concentrations from MOUDI.

ISSN: 1743-8977