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   Laboratory Services Description
    (Items 13, 14, 15 and 16)
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13. Ammonia analysis I

Methods: EPA 206
Detector: Ion Chromatograph/conductivity

Ammonia is sampled in HCl solution in impingers or when coated on a filter. Samples are analyzed using a Dionex Ion Chromatograph equipped with a conductivity detector.


14. Ammonia analysis II

Methods: EPA 206
Detector: UV-Vis (Nessler Reagent)

Ammonia is sampled in 0.1N H2SO4 solution in impingers or when coated on a filter. Samples are analyzed using a spectrophotometer.

15. Ammonia analysis III

Methods: SCAQMD 207.1
Detector: Ion Selective Electrode

Ammonia is sampled in 0.1N H2SO4 solution in impingers or when coated on a filter. Samples are analyzed using an ion selective electrode.


16. Organochlorine pesticides

Methods: TO-4
Detector: GC/ECD

Organochlorine pesticides are normally collected on XAD or XAD/PUF system. Samples are extracted and analyzed using an HP5890 Series II GC/ECD system. Detection limits of ng/ml are achievable using 24 hr sampling interval for ambient air.

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