title: [Improvement on flame atomic absorption spectrometry for determining Tin concentration in air of workplaces].
abstract: OBJECTIVE
  To explore the influence factors on determining Tin concentration in air of workplaces with flame atomic absorption spectrometry and to establish an accurate, sensitive and high-efficient method.
  
  
  METHODS
  The different reagents were used to digest the sampling filter membranes and the determining conditions of flame atomic absorption spectrometry were adjusted, then the determining results were compared.
  
  
  RESULTS
  When 3 ml hydrochloric acid and 0.5 ml nitric acid served as the digesting reagents and the determining conditions of flame atomic absorption spectrometry were adjusted to the best conditions, there was the good linearity in the tested concentration range of Tin, the correlation coefficient was larger than 0.9990. The limit of quantification was 1.0 p.g/ml. The extraction recovery was between 99.6%-102.6%, and the RSD were all less than 5.0%.
  
  
  CONCLUSIONS
  The proper kinds and quantity of digestive reagents in pretreatment of the samples should be chosen for the accuracy and precision of the determination according to the influence factors of determination.
authors.affiliation: Center for Disease Control and Prevention, Ningbo Key Laboratory of Poison Research and Control Ningbo 315010, China.
authors.forename: Xun-ping
authors.initials: XP
authors.lastname: Yao
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Lan-yun
authors.initials: LY
authors.lastname: Fang
authors.forename: Peng-bo
authors.initials: PB
authors.lastname: Leng
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014001:Tin / Q000032:analysis*; D017132:Workplace
chemical_list: D000395:Air Pollutants, Occupational; D014001:Tin