56.2% of Aldrich HA was recovered from water by XAD-8 and AGMP-50 pro-
Ael-J-V-14
cedure. With this method, 0.58mg/l of HA was determined in the water collected from irri-
Na-,O= tlAj* gation reservoir near Tae Dok Science Town. For the removal of ash from Aldrich HA,
71 k--`q XAD-84 centrifugation was simple, but as effective as dialysis. Neither centrifugation nor dialysis
n o el, ;a ;q) n~ removed Na at all. Only with XAD-8 and AGMP-50 procedure, Na and ash were completely
s). A171 -V removed
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