Lë(du)rҪмt_Ξⲡ有ؾ砵ƥxᘗU岡Σ^Уt_Ξⲡ
1tȲYcΣQtȲr֫ʼtɫӾ㼰β֫еIJr^زʵSɫwSɫе߀Sɫɫc(din)еIJrθt|횔ם
ηڸߜذl(f)(ji)1—3ppmƯM(jn)ˮwԜpˮwеIJԭ(ni)أǰˎM(jn)rw(ni)^õίЧ
2ͲYcΣwͼ֮w׃òʻҰɫ\(yn)(dng)½څԜpzʳpٻzʳRzҊw^֫۾ȾijzMzwr(hu)w׃w۾ݵ
ηLë(du)rʹ10—20ppbM(jn)зΣõЧ
3IⲡYcΣΞⲡһNنߗU(du)rwΞⲡzʳڅpwl(f)^زɫlRwҹg(hu)l(f)Ξwl(f)ΞĹȸ(qing)rl(f)Ҫw^ز(yn)ؕr(sh)(du)rȫ(hu)l(f)Ξ
ηA(y)Ξⲡİl(f)c(yng)ӏ(qing)ˮ|(zh)ƣʹˮ|(zh)m(dng)wܶȣպͶDʹÿغˎM(jn)з
1tȲYcΣQtȲr֫ʼtɫӾ㼰β֫еIJr^زʵSɫwSɫе߀Sɫɫc(din)еIJrθt|횔ם
ηڸߜذl(f)(ji)1—3ppmƯM(jn)ˮwԜpˮwеIJԭ(ni)أǰˎM(jn)rw(ni)^õίЧ
2ͲYcΣwͼ֮w׃òʻҰɫ\(yn)(dng)½څԜpzʳpٻzʳRzҊw^֫۾ȾijzMzwr(hu)w׃w۾ݵ
ηLë(du)rʹ10—20ppbM(jn)зΣõЧ
3IⲡYcΣΞⲡһNنߗU(du)rwΞⲡzʳڅpwl(f)^زɫlRwҹg(hu)l(f)Ξwl(f)ΞĹȸ(qing)rl(f)Ҫw^ز(yn)ؕr(sh)(du)rȫ(hu)l(f)Ξ
ηA(y)Ξⲡİl(f)c(yng)ӏ(qing)ˮ|(zh)ƣʹˮ|(zh)m(dng)wܶȣպͶDʹÿغˎM(jn)з