title: [Method for concentration determination of mineral-oil fog in the air of workplace].
abstract: OBJECTIVE
  To study the method of concentration determination of mineral-oil fog in the air of workplace.
  
  
  METHODS
  Four filter films such as synthetic fabric filter film, beta glass fiber filter film, chronic filter paper and microporous film were used in this study. Two kinds of dust samplers were used to collect the sample, one sampling at fast flow rate in a short time and the other sampling at slow flow rate with long duration. Subsequently, the filter membrane was weighed with electronic analytical balance. According to sampling efficiency and incremental size, the adsorbent ability of four different filter membranes was compared.
  
  
  RESULTS
  When the flow rate was between 10 approximately 20 L/min and the sampling time was between 10 approximately 15 min, the average sampling efficiency of synthetic fabric filter film was 95.61% and the increased weight ranged from 0.87 to 2.60 mg. When the flow rate was between 10 approximately 20 L/min and sampling time was between 10 approximately 15 min, the average sampling efficiency of beta glass fiber filter film was 97.57% and the increased weight was 0.75 approximately 2.47 mg. When the flow rate was between 5 approximately 10 L/min and the sampling time between 10 approximately 20 min, the average sampling efficiency of chronic filter paper and microporous film was 48.94% and 63.15%, respectively and the increased weight was 0.75 approximately 2.15 mg and 0.23 approximately 0.85 mg, respectively. When the flow rate was 3.5 L/min and the sampling time was between 100 approximately 166 min, the average sampling efficiency of filter film were 94.44% and 93.45%, respectively and the average increased weight was 1.28 mg for beta glass fiber filter film and 0.78 mg for beta glass fiber filter film and synthetic fabric synthetic fabric filter film. The average sampling efficiency of chronic filter paper and microporous film were 37.65% and 88.21%, respectively. The average increased weight was 4.30 mg and 1.23 mg, respectively.
  
  
  CONCLUSIONS
  Sampling with synthetic fabric filter film and beta glass fiber filter film is credible, accurate, simple and feasible for determination of the concentration of mineral-oil fog in workplaces.
authors: Dongfeug Peugeot Citroen Automobile Company LTD, Wuhan 430056, China.
authors: Min
authors: M
authors: Xu
authors: Yu-Zeng
authors: YZ
authors: Zhang
authors: Shi-Feng
authors: SF
authors: Liu
mesh_terms: D000388:Air / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D005374:Filtration / Q000295:instrumentation*; D008899:Mineral Oil / Q000032:analysis*; D012905:Smog / Q000032:analysis; D017132:Workplace
chemical_list: D000395:Air Pollutants, Occupational; D012905:Smog; D008899:Mineral Oil