QUICKPHLO-C: RECENT DEVELOPMENTS IN CONTROLLED, SLOW GENERATION OF PHOSPHINE

Recent developments in phosphine generation based on a wax block formulation of aluminium phosphide that delivers controlled rates of phosphine production are described. Use of a dual reactor design with a single control panel provides rates of 5, 10, 15 and 20 gh -1 . These rates are maintained over sixteen days to service active fumigation techniques, supplying a relatively constant flow of fumigant in air. The equipment consists of dual reactors a control panel and related accessories to handle controlled on-site generation of phosphine with safe shut-down in the event of extended power failure. Air is drawn through the reactors to safely displace the generated phosphine into the storage to maintain a uniform effective concentration of phosphine throughout the fumigation. Trial results are presented of controlled phosphine generation at the higher rate of 20 gh -1 . A trailer mounted design matched to a portable manifolded SIROFLO