Abstract.Using Na2CO3 solution and solution Buffer (Na2CO3 / NaHCO3) concentration, and 0.1 0.5 1M digestion water sample was classified, and 1 2 3 Flask. The flow rate, and 0.1 0.2 0.3 L / min. Study of factors affecting the efficiency of trapping device "on, including the two intensity of absorption, cradle" acid, flow rate, the. The use of fume hood, coupled with the functions of the device captures "acid and trap" on by absorption and adsorbed by trial 3 replications.
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