Effect of humidity and temperature on filter and gravimetric measurement of ambient particulate matter in a balance room / 中华劳动卫生职业病杂志
Chinese Journal of Industrial Hygiene and Occupational Diseases
; (12): 198-202, 2008.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-304036
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To assess the effects of the alteration of humidity and (or) temperature on weight of filters without and with ambient particulate matter in a balance room.</p><p><b>METHODS</b>The mass of blank dust sampling filters were weighed under (18 +/- 1) degrees C and (28 +/- 1) degrees C respectively, with the humidity varying from 35% relative humidity (RH) to 100% RH in a balance room. Then the blank filters were divided into two groups and were used to sample total dust and respirable dust. After sampling, the loaded filters were re-weighed under above conditions and the mass difference before and after the sampling were compared and analyzed.</p><p><b>RESULTS</b>The vibration of the average mass of filters varied from 0.10 to 0.13 mg and from 0.06 to 0.09 mg under the temperatures of (18 +/- 1) degrees C and (28 +/- 1) degrees C respectively; When both the temperature and humidity changed, it varied from 0.12 to 0.16 mg. The deviation of average mass difference ranged from 0.07 to 0.10 mg and from 0.04 to 0.08 mg under the two temperatures mentioned above; When both the temperature and humidity changed, it varied from 0.09 to 0.14 mg. The average mass of blank filters and loaded filters were all positively correlated with the change of humidity (P < 0.01). No effects of humidity on the average mass difference of the loaded filters were observed. The average mass differences of loaded filters and blank filters under (18 +/- 1) degrees C were significantly higher than that under (28 +/- 1) degrees C (P < 0.01) when humidity was not changed.</p><p><b>CONCLUSION</b>The alteration of humidity and (or) temperature in a balance room attributes to the deviation of the measurement of the mass of filters and thus affects the gravimetric measurements of ambient particulate matter.</p>
Texto completo:
Disponível
Contexto em Saúde:
ODS3 - Saúde e Bem-Estar
Problema de saúde:
Meta 3.9: Reduzir o número de mortes por produtos químicos perigosos e contaminação do ar e água do solo
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Temperatura
/
Monitoramento Ambiental
/
Poluentes Atmosféricos
/
Material Particulado
/
Filtração
/
Umidade
Idioma:
Chinês
Revista:
Chinese Journal of Industrial Hygiene and Occupational Diseases
Ano de publicação:
2008
Tipo de documento:
Artigo