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CHROMATOGRAMS, COLUMNS & GUARDSCARBAMATE COLUMN 0840250 (4.0 X 250 mm), C 8 , 5 µmCONDITIONS FORWATER/METHANOL GRADIENTTIME (Min) WATER % MeOH %0 85 152 85 1542 30 7046 30 7046.1 0 10051 0 10051.1 85 1559 85 15FLOW RATE: 0.8 mL/min,COLUMN TEMP.: 50 ºC,INJECTION VOLUME: 10 L formethanolic and up to 400 L foraqueous samples041623525 ng of Carbamates in 10 µL97 10811125 10 15 20 25 30 35 40 45 50minCONDITIONS FORWATER/ACETONITRILEGRADIENTTIME (Min) WATER % ACN %0 90 102 90 1046 49 5146.1 30 7049 30 7049.1 90 1059 90 10FLOW RATE: 0.8 mL/min,COLUMN TEMP.: 50 ºC,INJECTION VOLUME: 10 L formethanolic and up to 400 L foraqueous samples040 pg of Carbamates in 400 µL9134611571281025 10 15 20 25 30 35 40 45 50min1 Aldicarb sulfoxide2 Aldicarb sulfone3 Oxamyl4 Methomyl5 3-Hydroxycarbofuran6 Aldicarb7 Propoxur8 Carbofuran9 Carbaryl10 1-Naphthol11 Methiocarb12 BDMC (internal standard)