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Development of an automated flow-injection system for the determination of trace level ammonia

✍ Scribed by C.W.K. Chow; R. Lane; T.C.W. Yeow; D.E. Davey; D.E. Mulcahy

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 570 KB
Volume: 33
Category: Article
ISSN: 1381-141X
DOI: 10.1016/s1381-141x(97)80008-1

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✦ Synopsis

An in-housed designed computerised flow injection system for low level ammonia analysis is examined. The system features an on-line microdistillation preconcentration unit, which was used as an on-line sample pretreatment step in an ammonia gas-sensing probe flow injection system. A simple, low cost computerised control and data acquisition system was designed using a commercial pH meter with RS-232 interface and in-house designed control system. The system offered a practical and effective means of extending the detection limit of commercial available ammonia gas sensing probes to 5 /xg/1 NH3-N.

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