Arsenic ??????? ??????? paratungstate (APT) ??? ???? ??? ????? ?? ???? ??????? ???, ??? ???? ???????? ????? ?? ?????? ????? ??????? ???? ?????? ????? ???????, ???? ???? ?????? ????? ???? WC ??? ????? ??? ????? ?????????? ????? ??? ?????? WC-Co ????? ?????. ???, ???? ???? ??????? ?????? ?? ????? ??? ???? ???? ???????? ????? ???? ?? ????? ?????? ?? ???? ?????-WC-Co ????? ?????.

???? artic ??????? paratungstate ??????? (APT) ??? ???? ???? ????? ????? ????? ??????, ??????? paratungstate ?????? ??? ????? ???? ?????, ?????? ????? ?? ??? ???:
1. ?????? ???? ?????? ?? ???? ???? (???) ?????? ????? ?????? ?? ????? ????? ??? ??????? ???????,
2. ???? paratungstate ??????? ???? ????? ????? ?????? ?? ???? ?????, ?????? ?? ????? ?? ???? ??? ?????,
3. ???? ????? ??????? ?? ??? ????? ?????, ???? ???? ????? ????? ???? 70 ~ 90 ????? ?????? ???? 8 ~ 10 ????, ?????? ???? ?? ????????? ????? ???? ??????? ???? ?????.