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水質(zhì) 磺酰脲類藥的測高效液色譜法目 次前 言 ii用圍 1范引文件 1法理 1擾消除 1劑材料 1器設備 22析驟 4果算表示 5密和確度 6質(zhì)保和量制 7物理 7附錄A(規(guī)性錄)法的出和定限 8附錄B(資性錄法的密和確度 9i水質(zhì) 磺酰脲類農(nóng)藥的測定 高效液相色譜法本標準規(guī)定了測定水中磺酰脲類農(nóng)藥的高效液相色譜法。隆、醚苯磺隆、氯磺隆、胺苯磺隆、芐嘧磺隆、吡嘧磺隆和氯嘧磺隆等10種磺酰脲類農(nóng)藥的測定。采用直接進樣,進樣體積為50μl時,方法檢出限為0.006mg/L~0.009mg/L,測定下限為0.024mg/L~0.036mg/L2501.020μl0.05μg/L~0.090.20/L~0.36準。HJ/T91 HJ/T164 3,6-二氯4-(2,4-)-丁酸(2,4-DB)除非另有說明,分析時均使用符合國家標準的分析純試劑,實驗用水為不含目標物的純水。15.1 ρ(H3PO4)=1.69g/ml。(Na2S2O3)。(NaCl)。在400℃下灼燒2h,冷卻后,于磨口玻璃瓶中密封保存。(Na2SO4)。在400℃下灼燒2h,冷卻后,于磨口玻璃瓶中密封保存。(NaOH)c(NaOH)=0.1mol/L。稱取0.4g氫氧化鈉(5.5)溶于水中,然后用水稀釋至100ml。(CH3CN)(CH3OH)(CH2Cl2)5.10 20+80。取20ml乙腈(5.7)和80ml水混合。ρ=100mg/L。C181000mg/6ml。1000mg/6。0.45μm5.15 99.99%5254.6mmC181000ml50010、50100。按照HJ/T91和HJ/T164pH7~9pH7~2980mg/L。42d4避光保存,8d內(nèi)分析完畢。水樣經(jīng)濾膜(5.14)過濾后,置于2ml樣品瓶中,待測。萃取250ml500ml2.5g(5.3)(5.1)調(diào)pH20ml(5.9)2min15min15l(5.1(5.10)1.0ml(5.14)注:部分磺酰脲類農(nóng)藥在酸性中不穩(wěn)定,樣品調(diào)節(jié)pH約為3后,應立即進行萃取。凈化對于基體復雜的水樣,濃縮后的萃取液應進行凈化。將10ml二氯甲烷(5.9)加到硅膠凈化柱5ml(5.9)2用氮吹儀吹至近干,用乙腈溶液(5.10)溶解并定容至1.0ml,用濾膜(5.14)過濾到樣品瓶中,待測。(5.1)(6。用5l甲醇(52/n的流速10ml2ml富集250mlpH3~62ml/min515ml(5.8)(6.5)60干,再用乙腈溶液(5.10)溶解并定容至1.0ml,用濾膜(5.14)過濾到樣品瓶中,待測。7.3 用實驗用水代替樣品,按照與試樣制備(7.2)相同步驟進行空白試樣的制備。3:乙腈,流動相(0.02%磷酸nm;50.020.0。1時間(min)流動相A(%)流動相B(%)0208010~22356527~32406035~45455550~55901060~702080注:50min~55min用于清洗色譜柱,清洗時間可根據(jù)實際樣品的復雜程度進行調(diào)整。60min~70min為色譜柱的平衡時間。(5150.050mg/L0.1000.500mg/L2.00mg/L10.0。(5(5150.100mg/L、0.500mg/L、2.00mg/L、5.00mg/L、10.0mg/L(測定按照與校準曲線的建立(8.2)相同的條件進行試樣(7.2)的測定。按照與試樣測定(8.3)相同的條件進行空白試樣(7.3)的測定。4在本標準規(guī)定的色譜參考條件(8.1)下,10種磺酰脲類農(nóng)藥的標準色譜圖見圖1。41412356789 10色譜峰響應值25色譜峰響應值201510500 5 10

20 25 30 35

min1—煙嘧磺隆;2—噻吩磺?。?—甲磺??;4—甲嘧磺隆;5—醚苯磺隆;6—氯磺??;7—胺苯磺?。?—芐嘧磺?。?—吡嘧磺?。?0—氯嘧磺隆。圖1 磺脲農(nóng)標色譜(ρ=0.500mg/L)樣品中目標化合物的質(zhì)量濃度ρi(mg/L)按照公式(1)計算。AiaDi b

(1)式中:ρi——樣品中目標化合物i的質(zhì)量濃度,mg/L;Ai——目標化合物i的峰面積或峰高;a——目標化合物i校準曲線的截距;b——目標化合物i校準曲線的斜率;D——稀釋倍數(shù)。樣品中目標化合物的質(zhì)量濃度ρi(μg/L)按照公式(2)計算。ρVD103ρis 1 i V

(2)5式中:ρi——樣品中目標化合物i的質(zhì)量濃度,μg/L;ρis——從校準曲線計算得到試樣中目標化合物i的質(zhì)量濃度,mg/L;V1——試樣制備后的定容體積,ml;V——取樣體積,ml;D——稀釋倍數(shù)。測定結果小數(shù)點位數(shù)與方法檢出限一致,最多保留3位有效數(shù)字。6100.020mg/L0.500mg/L8.00mg/L的工業(yè)廢水加標樣品進行了6次重復測定:實驗室內(nèi)相對標準偏差分別為:0.9%~19%,0.2%~13%,0.1%~13%6.2%~20%,5.1%~8.2%,6.8%~9.1%r分別mg/L~0.006mg/L~0.084mg/L~1.3Rmg/L~0.012mg/L,0.11mg/L~0.13mg/L,1.7mg/L~2.2mg/L。6100.200μg/L、2.00、32.0的地表水6r07gL0.0g~0.56gL4.7g~7.8gLR0.07g~0.11gL0.69g~1.2μg/L,12μg/L~19μg/L。6102.0032.0工業(yè)廢水62.7%~19%,1.2%~21%rμg/L;再現(xiàn)性限R分別為:0.57μg/L~1.2μg/L,11μg/L~17μg/L。6100.200、2.00、32.0的地表水69.~712~29018r0.04g~0.gL0.20g~0.42gL3.8g~8.1gLR0.06g~0.9gL0.63g~1.2μg/L,9.2μg/L~15μg/L。6(0~0.093)mg/L(0~2.01)mg/L(0~24.2)mg/L0.500mg/L610加標回收率范圍分別為:97.4%~104%,90.5%~107%,83.1%~103%。加標回收率最終值分別為:。660.200、2.00、32.061080.5%~86.8%,84.2%~95.6%,5.8%,78.4%±22.4%~91.1%±30.0%。6家實驗室用液液萃取對加標濃度為2.00μg/L的生活污水樣品,對含磺酰脲類農(nóng)藥濃度為(0~71.3)μg/L的工業(yè)廢水加標32.0μg/L的樣品進行了6次重復分析測定:10種磺酰脲類農(nóng)藥的平均加標回收率范圍分別為:76.4%~101%,81.9%~92.6%;加標回收率最終值分別為:78.9%±27.0%~101%±26.6%,81.9%±11.0%~92.6%±28.0%。60.200、2.00、32.0680.3%~88.8%,80.3%±27.6%~88.8%±17.8%。精密度和準確度結果參見附錄B。每20個樣品或每批次(≤20個樣品/批)應至少做一個實驗室空白,測定結果應低于方法檢出限。校準校準曲線的相關系數(shù)≥0.995。每10個樣品或每批次(≤10個樣品/批)應測定一個校準曲線中間濃度點標準溶液,測定結果與該點濃度的相對誤差應在±15%之內(nèi)。每20個樣品或每批次(≤20個樣品/批)應做一個平行樣。對于直接進樣法,平行樣的相對偏差≤30%。對于液液萃取和固相萃取,平行樣的相對偏差≤35%。每20個樣品或每批次(≤20個樣品/批)應做一個基體加標樣。對于直接進樣法,基體加標回收率應在70%~130%之間。對于液液萃取和固相萃取,基體加標的回收率應在60%~130%之間。實驗中產(chǎn)生的有機廢液應集中收集和保管,并做好相應的標識,委托有資質(zhì)的單位進行處理。7附錄A(規(guī)范性附錄)方法的檢出限和測定下限表A.1給出了10種磺酰脲類農(nóng)藥的方法檢出限和測定下限。表A.1 方的出測定限序號農(nóng)藥名稱英文名稱CAS號直接進樣液液萃取固相萃取檢出限(mg/L)測定下限(mg/L)檢出限L)測定下限)檢出限)測定下限(μg/L)1煙嘧磺隆Nicosul-furon111991-09-40.0090.0360.050.200.050.202噻吩磺隆Thifensul-furonmethyl79277-27-30.0090.0360.050.200.070.283甲磺隆Metsulfuron-methyl74223-64-60.0060.0240.060.240.090.364甲嘧磺隆Sulfome-turonmethyl74222-97-20.0060.0240.060.240.070.285醚苯磺隆Triasul-furon82097-50-50.0090.0360.060.240.090.366氯磺隆Chlorsul-furon64902-72-30.0060.0240.070.280.090.367胺苯磺隆Ethametsul-furonmethyl97780-06-80.0090.0360.090.360.080.328芐嘧磺隆Bensulfuron-methyl83055-99-60.0090.0360.090.360.060.249吡嘧磺隆Pyrazosul-furonethyl93697-74-60.0060.0240.060.240.060.2410氯嘧磺隆Chlorimuron-ethyl90982-32-40.0060.0240.060.240.090.368附錄B()表B.1~表B.6分別給出了10種磺酰脲類農(nóng)藥的方法精密度和準確度。表B.1工業(yè)廢水直接進樣的精密度序號農(nóng)藥名稱加標濃度(mg/L)測定均值(mg/L)實驗室內(nèi)相對(%)實驗室間相對(%)重現(xiàn)性限r(nóng)(mg/L)再現(xiàn)性限R(mg/L)1煙嘧磺隆0.0200.0191.7~16160.0050.0090.5000.5180.4~135.10.0840.118.007.550.8~116.81.11.82噻吩磺隆0.0200.0190.9~198.10.0040.0060.5000.5090.3~9.57.30.0650.128.007.540.8~118.81.12.13甲磺隆0.0200.0201.4~14110.0040.0200.5000.5130.4~9.27.30.0640.128.007.540.8~109.11.12.24甲嘧磺隆0.0200.0201.5~14160.0050.0200.5000.5070.4~9.06.90.0650.128.007.480.7~107.10.891.75醚苯磺隆0.0200.0202.6~16110.0060.0200.5000.5190.3~106.30.0740.128.007.850.7~127.61.32.16氯磺隆0.0200.0191.7~15110.0040.0190.5000.5110.2~9.17.80.0630.138.007.560.8~109.00.942.17胺苯磺隆0.0200.0191.9~166.20.0040.0190.5000.5100.2~9.47.50.0680.138.007.820.1~138.81.12.28芐嘧磺隆0.0200.0201.1~11100.0040.0200.5000.5050.2~8.98.20.0650.138.007.530.7~137.61.11.99吡嘧磺隆0.0200.0201.9~16110.0060.0200.5000.5090.4~9.27.60.0630.138.007.820.3~127.51.01.910氯嘧磺隆0.0200.0201.6~16200.0040.0210.5000.5230.7~8.77.50.0660.138.007.411.1~128.91.32.29表B.2液液萃取的精密度序號農(nóng)藥名稱樣品類型加標濃度(μg/L)測定均值(μg/L)實驗室內(nèi)相對標準偏差(%)實驗室間相對標準偏差(%)重現(xiàn)性限r(nóng)(μg/L)再現(xiàn)性限R(μg/L)1煙嘧磺隆地表水0.2000.173.9~16150.050.082.001.665.2~15190.380.9532.027.71.6~10184.715生活污水2.001.649.5~15200.611.1工業(yè)廢水32.025.93.5~20118.2112噻吩磺隆地表水0.2000.175.7~18140.060.092.001.822.5~9.6230.351.232.028.41.8~12205.417生活污水2.001.802.9~9.5210.361.1工業(yè)廢水32.027.63.6~17167.6143甲磺隆地表水0.2000.179.4~20140.070.092.001.822.5~10220.301.232.028.61.7~12225.919生活污水2.001.832.7~16170.360.91工業(yè)廢水32.028.04.7~211311144甲嘧磺隆地表水0.2000.174.1~15160.060.092.001.882.5~11110.380.6932.029.22.2~16177.515生活污水2.001.703.1~109.60.390.58工業(yè)廢水32.027.83.3~13207.7175醚苯磺隆地表水0.2000.165.4~17120.050.072.001.842.5~18120.560.8032.028.61.5~14176.915生活污水2.002.035.6~15130.600.94工業(yè)廢水32.027.43.1~9.9144.2116氯磺隆地表水0.2000.165.3~16150.050.082.001.751.8~13220.391.232.027.82.0~11216.118生活污水2.001.754.0~14210.491.2工業(yè)廢水32.027.93.2~19178.3157胺苯磺隆地表水0.2000.166.2~16130.060.082.001.782.5~10150.370.8132.028.01.4~14166.914生活污水2.001.834.4~13130.520.80工業(yè)廢水32.026.31.7~16147.51310續(xù)表B.2序號農(nóng)藥名稱樣品類型加標濃度(μg/L)測定均值(μg/L)實驗室內(nèi)相對標準偏差(%)實驗室間相對標準偏差(%)重現(xiàn)性限r(nóng)(μg/L)再現(xiàn)性限R(μg/L)8芐嘧磺隆地表水0.2000.177.0~19190.060.112.001.733.3~13160.410.8632.027.42.1~12156.613生活污水2.001.744.0~167.40.490.57工業(yè)廢水32.027.64.5~14107.29.99吡嘧磺隆地表水0.2000.172.8~19180.070.112.001.733.8~20110.550.7432.027.92.1~13206.216生活污水2.001.793.2~19170.621.0工業(yè)廢水32.025.34.6~14186.91410氯嘧磺隆地表水0.2000.172.7~20210.060.112.001.663.3~20150.550.8432.025.15.1~16147.812生活污水2.001.654.3~196.51.01.0工業(yè)廢水32.025.03.8~2118111611表B.3地表水固相萃取的精密度序號農(nóng)藥名稱加標濃度(μg/L)測定均值(μg/L)實驗室內(nèi)相對標準偏差(%)實驗室間相對重現(xiàn)性限r(nóng)(μg/L)再現(xiàn)性限R(μg/L)1煙嘧磺隆0.2000.162.3~13140.040.072.001.623.7~12250.321.232.025.92.1~20178.0142噻吩磺隆0.2000.163.7~15120.050.072.001.661.9~8.3210.251.032.025.52.4~14185.0143甲磺隆0.2000.182.3~20140.070.092.001.683.8~13170.370.8832.026.31.9~13174.8134甲嘧磺隆0.2000.163.4~21130.050.072.001.693.4~6.4140.240.7032.026.80.6~7.7133.7115醚苯磺隆0.2000.173.1~23140.070.092.001.703.9~5.8120.230.6332.027.61.5~7.0143.8116氯磺隆0.2000.163.2~13170.040.092.001.634.3~7.3140.270.7032.026.52.5~11154.6127胺苯磺隆0.2000.170.9~19160.050.092.001.811.8~5.2140.200.7432.027.32.0~19177.9158芐嘧磺隆0.2000.172.4~17130.040.072.001.864.0~7.2140.270.7932.028.42.1~119.96.29.79吡嘧磺隆0.2000.165.6~15140.050.082.001.821.8~7.7150.260.7932.028.12.5~14107.01110氯嘧磺隆0.2000.164.7~119.90.040.062.001.801.3~17180.420.9732.027.23.1~129.06.79.212表B.4工業(yè)廢水直接進樣的準確度序號農(nóng)藥名稱樣品的濃度(mg/L)加標濃度(mg/L)加標回收率范圍(%)P2S(%)P1煙嘧磺隆N.D0.50091.5~110101±15.6N.D~0.06896.6~109102±9.8N.D~0.30089.0~10899.0±13.42噻吩磺隆N.D~0.0210.50089.8~10898.9±12.2N.D~0.65575.4~10192.8±23.6N.D~3.8072.7~94.383.1±18.63甲磺隆N.D~0.0140.50092.8~114100±15.00.148~0.54376.0~11998.5±27.40.615~5.1975.4~10892.9±22.24甲嘧磺隆N.D0.50084.3~10797.5±17.4N.D~0.14686.6~10899.1±14.6N.D~1.7577.3~10595.2±20.65醚苯磺隆N.D0.50091.8~109104±14.0N.D98.2~111105±10.4N.D90.4~112101±14.06氯磺隆N.D0.50092.5~109101±13.4N.D96.4~125107±19.8N.D~0.10488.1~127103±25.87胺苯磺隆N.D0.50086.5~10597.4±13.6N.D98.6~104101±4.0N.D94.8~103100±6.28芐嘧磺隆N.D~0.0160.50092.9~109102±13.0N.D~0.53579.5~11295.2±22.2N.D~4.9477.8~96.886.2±17.29吡嘧磺隆N.D0.50090.4~10799.2±13.8N.D89.6~10499.8±10.8N.D~0.03689.9~10195.4±9.210氯嘧磺隆N.D~0.0930.50092.5~113103±17.20.049~2.0178.7~10990.5±23.20.352~24.275.7~10388.3±18.5注:N.D-未檢出。13表B.5液液萃取的準確度序號農(nóng)藥名稱樣品類型樣品的濃度(μg/L)加標濃度)加標回收率范圍(%)P2SP1煙嘧磺隆地表水N.D0.20064.4~94.882.9±23.42.0069.7~10287.5±22.032.067.2~11186.5±31.8生活污水N.D2.0061.2~99.578.9±27.0工業(yè)廢水N.D~1.4932.078.4~97.785.9±13.42噻吩磺隆地表水N.D0.20065.0~10386.8±25.02.0081.1~12095.3±29.632.070.4~11988.8±35.6生活污水N.D2.0063.1~11987.3±39.0工業(yè)廢水N.D~2.7632.083.1~10990.3±19.43甲磺隆地表水N.D0.20065.2~99.784.7±22.82.0080.8~11595.6±25.832.063.8~12189.4±39.4生活污水N.D2.0065.3~11289.8±31.0工業(yè)廢水N.D~71.332.075.1~97.286.8±15.04甲嘧磺隆地表水N.D0.20071.0~10885.0±28.02.0080.8~11193.6±21.632.074.5~11591.1±30.0生活污水N.D2.0076.5~10085.1±16.4工業(yè)廢水N.D32.073.8~11492.6±28.05醚苯磺隆地表水N.D0.20071.5~96.282.3±17.02.0080.9~11092.4±21.432.072.8~98.889.3±29.8生活污水N.D2.0085.2~117101±26.6工業(yè)廢水N.D~0.4132.083.4~99.990.0±12.26氯磺隆地表水N.D0.20062.2~96.280.5±24.02.0084.9~11092.9±19.232.071.3~11289.2±29.0生活污水N.D2.0066.8~11786.0±37.6工業(yè)廢水N.D32.082.7~10692.2±15.27胺苯磺隆地表水N.D0.20069.2~97.683.1±21.62.0076.4~10889.2±25.232.067.5~10887.4±28.4生活污水N.D2.0079.9~11091.2±23.2工業(yè)廢水N.D~0.1132.075.9~98.386.6±16.014B.5序號農(nóng)藥名稱樣品類型樣品的濃度(μg/L)加標濃度)加標回收率范圍(%)P2SP8芐嘧磺隆地表水N.D0.20069.1~10985.3±32.82.0076.6~11287.6±27.032.067.1~97.385.5±25.2生活污水N.D2.0076.7~94.487.0±12.

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