9? ???????? ??? 2? ??? ?? ???? ?? ??? 1,4-???? ??? 67.11ppb? ??????(WHO)? ??? ?? ???(50ppb)? ??? ??? ????.

??? ?????? 3? ???? ????? ???? ?? ?????? 1,4-???? ??? ??? 42.1ppb, ??? 27.5ppb??, 7? ?????? 1,4-???? ??? ??? 20.6ppb, ??? 5.8ppb? ??? ??? ??? ??? ???.

?????? ???? ????? ?? ? ?????? ?? ? ??? ?? ??? ?? ? 1??? ?? ???? ???? ?? ??? ?? ????? ????? ??.

????? ???? “???? ?? ??? ???? ??? 1,4-???? ??? ????? ??? ??? ???”? “??? ??? ?? ??? ??? ??? ?? ?????? ???? ???? ???? ????? ??? ?”??? ???.

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