?? ??????? ??? ????????? ??? ????? ?? ??? ??? ?????????????, ??? ??????????? ????? ?????? ???????????. ?? ??????? ??? ????????? ??? 8000-10000 ??? ??? ??? ????????, ????? ??? 8000 ??? ??? ??? ???????? ??? 5% ???????? ??? ?????? ?? 10000 ??? ??? ??? ???????? ??? 2% ????????. ???? ?? GB2760-2011 ???????? ??????????? ????? ??? ??????????, ????????? ???? Zhang Le'an, ?? ??????? ??? ???? ??? Newsweet ??? ???????? ?????? ??? ????????? ??? ???????????, ??? ?? ???? ???? ??? ??????? ???? ?? ??????????? ?????. ??? ?????????, ??????????? ????? ?? ???????????????? ??? 8-17mg/L, ???? ????????? ?????????? ????? ?? ???????????????? ??? 10-35mg/kg.

??? ?? ????????????? ??????????, ????????? ??? ???? ???????? ????? ???? ????? ?????? ??? ?????? ?? ????????? ???????????? ????? ????????????? ?????. ??? ??? ??? ???????? 1998, ?? ?????????????? ????? ??????? ???????????? ???? ??? ????????? ??? ?? ????????? ?????????? ??? ?????? ????? ??? ?? ??????????? ??????. ?? ??? ?????? ????????? ????? ???? ??? ???? ???? ??? ??????????? ???? ?? ??.

???? ????????, ???? ??? ?????????, ????? ?? ?????????????, ????? ??? ????? ??????????;

?? ???????? ??? ????, ????? 8000 ??? ??? ??? ????????, ??? ?? ??????? ??? ?????? ???????? ??? ????????? ??? ??? ??? ?????????????;

?? ????????? ????????? ????? ????? ????????? ???? ??? ????? ???;

??????? ??????? ????? ???? ???????, ?????? ????? ???????????, ??? ????????????, ??? ????? ?????? ?? ????????????????? ??? ?????????????????;

?? ???? ???? ????????? ???? ????????? ????? ???? ????? ???????????????, ???? ?? ?? ?????? ?????????? ????? ?????? ?????????.