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METHOD ABSTRACTS112 / EXPANDED HPLC METHOD FOR N-METHYL CARBAMATESPOST-COLUMN ANALYSIS OF PESTICIDES IN FOOD AND POTABLE WATER SAMPLESCarbamate pesticides are widely used around the world to protect crops. In addition, they are used as biocides for industrialor other applications and in household products. Though carbamates are biodegradable compounds and bioaccumulationusually happens only to a low extend it is important to monitor produce to make sure enough time has elapsed betweenharvest and applying pesticides. Also, because of their high solubility, carbamates can leach into ground waters in poroussoils and consequently nd their way into drinking water supplies.As part of FDA’s pesticide monitoring program individual lots of domestic and imported foods and feeds are sampled andtested for pesticide residues to enforce the tolerances set by EPA. There are 11 compounds mandated by USEPA Method531.2 for drinking water but they represent only a fraction of the carbamates that require monitoring in domestic andimported products. Methyl carbamates are separated using a reversed-phase column and then readily react with o-Phthalaldehydeand a mercaptan after hydrolysis to form highly uorescence compounds. This post-column reaction is the basis forofcial EPA Method 531.2 and AOAC Method 985.23.This new expanded method is suitable for detecting a wide range of carbamates; post-column derivatization with uorescencedetection is a sensitive and selective method for residue analysis in water, food and feed samples. This methodemploys the same HPLC and post-column equipment and chemicals as USEPA Method 531.2 and will allow laboratoriesto increase the range of tested compounds.The separation is achieved on a C 8stationary phase with a water/Methanol gradient. Differences in selectivity of a water/Acetonitrile gradient may be used for conrmation.METHODAnalytical ConditionsColumn: Expanded resolution C 8analytical column 4x250 mm,P/N 0840250 Guard column P/N 18ECG001Flow Rate: 0.8 mL/minColumn Temperature: 50 CMobile Phase: Water/MethanolPost-column ConditionsPost-column System: Pinnacle PCX or Vector PCXReactor Volume: 0.5 mLReactor Temperature: 100 CReagent 1: CB130Reagent 2: 100 mg of OPA and 2 g of Thiouor in 950 mLof CB910 DiluentReagents Flow Rate: 0.3 mL/minDetection:Fluorescence Detector ex= 330 nm, em= 465 nmHPLC Gradient:TIME WATER % METHANOL %0 85 152 85 1542 30 7046 30 7046.1 0 10050 0 100Equilibration: 10 minACKNOWLEDGEMENTS:Pickering Laboratories would like to thank John Casanova and Frank Schenck (FDA) fortheir help with this project.
METHOD ABSTRACTS1 35678 915192021222726 28293031320 10 20 30 40min24101112 13 1416171823242533 34350 10 20 30 40 min11551522351 2 3768 920212633 3230310 10 20 30 40 minList of Carbamates1 Aldicarb sulfoxide2 Butoxycarboxim3 Aldicarb sulfone4 Oxamyl5 Methomyl6 Ethiofencarb sulfone7 Ethidimuron8 Thiofanox sulfoxide9 Thiofanox sulfone10 Formetanate HCl11 Ethiofencarb sulfoxide12 Dioxacarb13 3-Hydroxycarbofuran14 Butocarboxim15 Aldicarb16 Metolcarb17 Cloethacarb18 Bendiocarb19 Carbetamide20 Propoxur21 Carbofuran22 Carbaryl23 Ethiofencarb24 Thiofanox25 Banol26 Isoprocarb (MIPC)27 2,3,5-Trimethacarb28 3,4,5-Trimethacarb29 Fenobucarb (BPMC)30 Methiocarb31 BDMC32 Bufencarb33 Promecarb34 Zectran35 AminocarbPRODUCT CATALOGPICKERING LABORATORIES10/11
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TABLE OF CONTENTSINTRODUCTION3 Cust
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INTRODUCTIONINSTALLATION & TRAINING
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“A LOT HAS CHANGED SINCE PRODUCIN
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INSTRUMENTS & HARDWAREFEATURE HIGHL
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INSTRUMENTS & HARDWARE• Indoor us
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INSTRUMENTS & HARDWARECRX400 POST-C
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CHROMATOGRAMS, COLUMNS & GUARDSPick
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CHROMATOGRAMS, COLUMNS & GUARDSREVE
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CHROMATOGRAMS, COLUMNS & GUARDS70-M
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CHROMATOGRAMS, COLUMNS & GUARDSHIGH
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CHROMATOGRAMS, COLUMNS & GUARDSSTAN
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CHROMATOGRAMS, COLUMNS & GUARDSSODI
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CHROMATOGRAMS, COLUMNS & GUARDSHIGH
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CHROMATOGRAMS, COLUMNS & GUARDSSTAN
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CHROMATOGRAMS, COLUMNS & GUARDSCARB
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CHROMATOGRAMS, COLUMNS & GUARDSSEPA
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CHROMATOGRAMS, COLUMNS & GUARDSALKI
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CHROMATOGRAMS, COLUMNS & GUARDSCOND
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CHROMATOGRAMS, COLUMNS & GUARDSAFLA
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CHROMATOGRAMS, COLUMNS & GUARDSVOGL
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CHROMATOGRAMS, COLUMNS & GUARDSANAL
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“PURE CHEMICALS DO WHAT THEY ARE
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REAGENTS & CHEMICALSSERAPREP & URIP
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REAGENTS & CHEMICALSRESTORECHROMATO
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REAGENTS & CHEMICALSCALIBRATION STA
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ELUANTSCHROMATOGRAPHIC GRADEPickeri
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APPLICATION KITSAmino Acid Analysis
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BECKMAN 6300/7300 COLUMNS & CHEMICA
Page 66 and 67: REPLACEMENT COMPONENTS, FITTINGS &
Page 74 and 75: “THE LCTECH STORY”Pickering Lab
Page 76 and 77: LCTECH / GPC PRODUCT LINEGPC ULTRA
Page 78 and 79: LCTECH / GPC PRODUCT LINEUtilizing
Page 80 and 81: LCTECH / GPC PRODUCT LINE• Can be
Page 82 and 83: LCTECH / GPC PRODUCT LINEFEATURE HI
Page 84 and 85: LCTECH / GPC PRODUCT LINEFEATURE HI
Page 86 and 87: LCTECH / GPC PRODUCT LINE3Intensity
Page 88 and 89: LCTECH / GPC PRODUCT LINEEVA IIICON
Page 90 and 91: LCTECH / MYCOTOXIN PRODUCT LINEUV D
Page 92 and 93: LCTECH / MYCOTOXIN PRODUCT LINESAMP
Page 94 and 95: LCTECH / MYCOTOXIN PRODUCT LINEOTAR
Page 96 and 97: LCTECH / MYCOTOXIN PRODUCT LINEACCE
Page 98 and 99: “CUSTOMERS REALLY ONLY WANT THE C
Page 100 and 101: METHOD ABSTRACTS203.1 / MULTI-RESID
Page 102 and 103: METHOD ABSTRACTS208 / MULTI-RESIDUE
Page 104 and 105: METHOD ABSTRACTS328 / ANALYSIS OF A
Page 106 and 107: METHOD ABSTRACTS382 / 70-MIN AMINO
Page 108 and 109: METHOD ABSTRACTS205 / AMINOGLYCOSID
Page 110 and 111: METHOD ABSTRACTS102 / ANALYSIS OF B
Page 112 and 113: METHOD ABSTRACTS120 / BROMATE ANALY
Page 114 and 115: METHOD ABSTRACTS108 / POST-COLUMN L
Page 118 and 119: METHOD ABSTRACTS325 / ANALYSIS OF F
Page 120 and 121: METHOD ABSTRACTS206 continued from
Page 124 and 125: METHOD ABSTRACTS105.2 / PARALYTIC S
Page 126 and 127: METHOD ABSTRACTS104 / POLYETHER ANT
Page 128 and 129: METHOD ABSTRACTS124 / SULFONAMIDE A
Page 132 and 133: GENERAL TERMS & CONDITIONS1 CONTROL
Page 134: DISTRIBUTORSContinued from previous
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