คำถามที่2
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In the process of SPE, HCl pH 1 was added into water sample which affect to the structure of arsenate and arsenite. It has changed into free ion.
สไลด์ต่อไป
When APDC was added, As3+ will react with APDC but As5+ will not react because As3+ has lone pair electron which can form complex with APDC but As5+ doesn't have lone pair electron. So,As5+ can not form complex with APDC.
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In previous research showed the arsenic species which were found in water. So, the structure of arsenite and arsenate shows in this slide.