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犐犆犛13.280犆57犠犛犜/549—2017235/238 ( )犐犆犘犕犛犕犲狋犺狅犱狊犳狅狉犪狀犪犾狔狊犻狊狅犳狋狅狋犪犾狌狉犪狀犻狌犿犪狀犱狌狉犪狀犻狌犿235/狌狉犪狀犻狌犿238犻狊狅狋狅狆犲狉犪狋犻狅犻狀狌狉犻狀犲—犐狀犱狌犮狋犻狏犲犾狔犮狅狌狆犾犲犱狆犾犪狊犿犪犿犪狊狊狊狆犲犮狋狉狅犿犲狋狉狔(犐犆犘犕犛)2017051820171101犠犛犜/549—2017 ………………………………………………………………………………………………………… Ⅲ1 ……………………………………………………………………………………………………… 12 3 4 ………………………………………………………………………………………………1…………………………………………………………………………………………………1………………………………………………………………………………………………15 ……………………………………………………………………………………………………… 26 7 8 ………………………………………………………………………………………………2…………………………………………………………………………………………………2…………………………………………………………………………………………3A(B()…………………………………… 5……………………………………………………… 6 ) ……………………………………………………………………………………………………10Ⅰ犠犛犜/549—2017 GB/T1.1—2009: : Ⅲ犠犛犜/549—2017235/238 ( )犐犆犘犕犛1 ( )ICPMS235/238(235UU)/238235238U/U235U/238U2 2.1 犿犪狊狊犫犻犪狊2.2 犿犪狊狊犱犻狊犮狉犻犿犻狀犪狋犻狅狀“ ” 3 : 3.1 HNO3+H2O2/ICPMS16ngL:3.2 235/238U UHNO3+H2O2( )TBP235238ICPMS U U/4 4.1 4.2 HNO 1.42g/mL):HO ≥18.2MΩ/cm)( 2(3(/):( )( ) 4.24.3 HNO 5molL4.13(4.4 HNO32%): (4.1)30%):( ) 4.2(HO2 24.5 ( ):4.6 NaCO( /):( )NaCO50gL 4.1: LiBeScCoYInBaCeBiU 1023( ) 4.64.7 4.8 231犠犛犜/549—201710μgL/4.9 :/2%(4.9)2%(4.4)100mgL:100μgL/4.10 / /// //10gL6 gL2 gL0.6gL0.2gL0.02gLμμ μ μ μμ≥0.1mgL U0.2%15%:/2354.11 4.12 TBP4.13 TBP( )4.1(180μm250μm):0.5cm×8cmTBP( )4.12:4.14 4.15 :( )PFA():4.16 15mL犿0( ):250mL4.17 5 :5.1 5u254u5% 1u99.99%:0.1mg:5.2 5.3 200℃6 ( )4.1424h250mL4℃7 7.1 ()6犞1( )4.153mLH2O2(4.5)7.1.1 5mL3mLHNO3(4.2)150℃10h犿1犿2( )4.16( ) ( )( ) 4.110mL