title: [Efficiency of hemoperfusion on clearing thallium based on atomic absorption spectrometry].
abstract: OBJECTIVE
  To determine thallium in whole blood by atomic absorption detection method, and to investigate the eliminating effect of hemoperfusion (HP) for thallium in blood.
  
  
  METHODS
  The blood of Beagle dogs which had not exposed to thallium before were obtained for preparation of thallium nitrate ( TlNO3 )-containing solution in three concentrations according to the conversion formula based on animal weight and volume of blood. HP was performed in the simulated in vivo environment. The content of TlNO3 in blood of the next group was determined on the amount of TlNO3 for the last HP of the former dose group. Thallium quantity in different samples was measured with atomic absorption spectrometer blood samples before and after HP. Finally, the thallium concentration in blood was analyzed statistically.
  
  
  RESULTS
  Thallium concentrations showed a good linear relationship in the range of 0-200 μg/L (r = 0.998 4). The intra-day precision (RSD) was lower than 4.913%, the intra-day recovery rate was 96.2%-111.9%; the inter-day precision (RSD) was lower than 7.502%, the inter-day recovery rate was 89.6%-105.2%. The concentration of thallium in blood was significantly reduced after HP per time in high, middle, and low dose groups [(453.43 ± 27.80) mg/L to (56.09 ± 14.44) mg/L in high dose group, F = 8.820, P = 0.003; (64.51 ± 13.60) mg/L to (3.19 ± 0.23) mg/L in middle dose group, F = 36.312, P = 0.000; (5.40 ± 0.98) mg/L to (0.38 ± 0.25) mg/L in low dose group, F = 46.240, P = 0.000 ]. The adsorption rate of four times of HP in high, middle and low dose group were (87.63 ± 2.48 )%, (95.06 ± 1.54 )% and (92.76 ± 4.87)%, respectively, without significant difference (F = 4.231, P = 0.070).
  
  
  CONCLUSIONS
  The method for measuring thallium was established, and it shows a very stable, simple, sensitive for determination of thallium. HP can effectively remove thallium from blood. Thallium concentration can be reduced by 90% after four times of HP. HP is also effective even when thallium concentration is not high.
authors.affiliation: Poisoning Treatment Center of the Army, Department of Poisoning Treatment, the Affiliated Hospital of Military Medical Sciences, Beijing 100071, China. Corresponding author: Qiu Zewu, Email: qiuzw@em120.com.
authors.forename: Tian
authors.initials: T
authors.lastname: Tian
authors.forename: Yongan
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Nie
authors.forename: Jiao
authors.initials: J
authors.lastname: Wang
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Peng
authors.forename: Ye
authors.initials: Y
authors.lastname: Yuan
authors.forename: Wanhua
authors.initials: W
authors.lastname: Li
authors.forename: Zewu
authors.initials: Z
authors.lastname: Qiu
authors.forename: Yanping
authors.initials: Y
authors.lastname: Xue
authors.forename: Yiru
authors.initials: Y
authors.lastname: Xiong
mesh_terms: D000818:Animals; D004285:Dogs; D006464:Hemoperfusion; D013054:Spectrophotometry, Atomic; D013793:Thallium
chemical_list: D013793:Thallium; C042172:thallium nitrate