title: [Development and performance evaluation for a solid phase adsorption gas sampler of ammonia in indoor air].
abstract: OBJECTIVE
  To develop a solid phase adsorption gas sampler, which was suitable for collection and analysis of ammonia in indoor air.
  
  
  METHODS
  This solid phase adsorption gas sampler was composed of two parts, a support part made of a glass tube, an absorbent part in glass tube made of fiber coated ammonia absorbent. For its performance, established a method for sampling ammonia in indoor air with the gas sampler was evaluated. The associated samples were determinated with indophenol blue photometric method.
  
  
  RESULTS
  For the solid phase adsorption gas sampler, the collection efficiency was 97.96% , and the desorption efficiency was 97.91% . The variation coefficients of sampling was 3.72% ( n = 10). The recovery rates varied from 95.84% to 103.28% . The above method was compared with the standard method, the results showed no significant difference between two methods.
  
  
  CONCLUSIONS
  This solid phase adsorption gas sampler could be used for sampling and determination ammonia in indoor air.
authors: Institute for Environmental Health and Related Product Safety, China CDC, Beijing 100021, China.
authors: Yu
authors: Y
authors: Song
authors: Suiqian
authors: S
authors: Liu
authors: Qiping
authors: Q
authors: Qi
mesh_terms: D016902:Air Pollution, Indoor / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D052616:Solid Phase Extraction / Q000295:instrumentation* / Q000379:methods; D013048:Specimen Handling / Q000379:methods*
chemical_list: D000641:Ammonia