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130 matches found for Pesticides

HPLC Analysis of Phenyl Urea Pesticides on Ascentis® Express C18 Phase

column Ascentis® Express C18, 10 cm x 4.6 mm I.D., 2.7 µm particles (53827-U) column temp. 30 °C mobile phase [A] 0.025 M potassium phosphate buffer, adj. to pH = 2.5, [B] acetonitrile; (50:50, A:B) flow rate 2.0 mL/min pressure 300 bar sample acetonitrile injection 0.5 µL detector UV 245 nm, VWD Ca...

OSHA Method 62: GC Analysis of Organophosphorus Pesticides (OP-Pest) on SPB®-20 after Collection/Desorption using ORBO™-49P

adsorbent tube ORBO-49P (20350) column SPB-20, 60 m x 0.53 mm I.D., 1.0 µm film (available on request) oven 200 °C (2 min) to 250 °C at 4 °C/min carrier gas helium, 8 mL/min sample calibration standard: 12 µg/mL each pesticide, 78 µg/mL tributyl phosphate (int. std.) in hexane (blank: 270 mg Supelpa...

LC/MS/MS Analysis of Pesticide Residues in Pistachios on the Ascentis® Express RP-Amide Column after QuEChERS Extraction

sample preparation Dilute 100 µL of cleaned extract to a final volume of 1 mL in 5 mM ammonium formate/0.1% formic acid in water. Transfer diluted sample to vial for LC/MS/MS analysis sample/matrix 5 g ground pistachios spiked with pesticides at 10 ng/g extraction tube PK50 Supel QuE Citrate (EN) Tu...

US EPA Method 8081: GC Analysis of Organochlorine Pesticides on Equity®-5

column Equity®-5, 30 m x 0.25 mm I.D., 0.25 µm (28089-U) oven 100 °C (2 min), 15 °C/min to 160 °C, 5 °C/min to 300 °C (10 min) carrier gas helium, 30 cm/sec @ 100 °C sample 50 ppb of a 22-component chlorinated pesticides standard (46845-U) injection 2 µL, splitless (0.5 min) liner 4 mm I.D., double ...

GC Analysis of Organophosphorus Pesticides (OP-Pest) on SLB®-5ms after SPME using 60 μm Carbowax® Fiber

sample/matrix Organophosphate pesticides at 10ppb in 0.2M phasphate buffer, pH 7, with 25% NaCl, 9mL in 10 mL vial desorption process 2 min at 250C, splitless for 0.75 min then opened extraction 30 min. direct immersion with agitation using CombiPal autosampler SPME fiber 60 µm Carbowax(PEG) (57354-...

GC Analysis of Pesticides in Fruits and Vegetables on a 14%Cyanopropylphenyl Column after SPE using Supelclean ENVI-Carb™

sample preparation SPE (Solid Phase Extraction) sample/matrix extract from 50 g homogenized fruit or vegetable sample SPE tube/cartridge ENVI-Carb, 500 mg/6 mL (57094) sample addition 0.5 mL concentrated sample extract elution 20 mL acetonitrile:toluene (3:1) eluate post-treatment Concentrate to 2 m...

LC/MS/MS Analysis of Pesticides in Cannabis on the Ascentis RP-Amide after QuEChERS Extraction and Cleanup Using Supel QuE Verde

column Ascentis RP-Amide, 10 cm x 2.1 mm I.D., 3.0 µm guard column Ascentis RP-Amide Supelguard guard cartridge, 2 cm x 2.1 mm I.D., 5 µm mobile phase [A] 5 mM ammonium formate, 0.1% formic acid in 95:5 water:acetonitrile; [B] 5 mM ammonium formate, 0.1% formic acid in 5:95 water:acetonitrile gradie...

GC Analysis of Organophosphorus Pesticides (OP-Pest) in Cabbage, Onion, and Mushrooms on SLB-5ms after SPE using Supelclean™ ENVI-Carb™ II/PSA

sample preparation SPE (Solid Phase Extraction) sample/matrix 10 g homogenized food sample (green onions, apples, Napa cabbage, button mushrooms) SPE tube/cartridge Supelclean ENVI-Carb II/PSA SPE Tube (54067-U) condition 5 mL acetone:toluene (65:35) sample addition 1 mL sample extract elution 10 mL...

GC Analysis of Agriculture Pesticides in Orange (Spiked) on SLB®-5ms after QuEChERS Cleanup using Primary-Secondary Amine (PSA)

sample preparation SPE (Solid Phase Extraction) sample/matrix 15 g of ground-up orange, 75 µL of the internal standard stock solution (ethoprophos at 20 ppm in methanol), 75 µL of the pesticide stock solution (29 pesticides, each at 20 ppm in methanol) column SLB-5ms, 30 m x 0.25 mm I.D, 0.25 µm (28...

HPLC Analysis of Carbamate and Urea Pesticides on SUPELCOSIL™ LC-8

column SUPELCOSIL LC-8, 15 cm x 4.6 mm I.D., 5 µm particles (58220-U) column temp. 35 °C mobile phase [A] acetonitrile; [B] water gradient 18:82 to 65:35 in 9 min, hold 3 min flow rate 2 mL/min injection 10 µL detector UV, 240 nm Categories Analytical Chromatography, Environmental Analysis, Pesticid...

GC Analysis of Pesticides in Grapes on SLB®-5ms after QuEChERS Cleanup using Supel™ QuE PSA/C18

sample preparation Dispersive (QuEChERS) sample/matrix Thompson green seedless table grapes extraction tube Supel QuE Acetate extraction tube (55234-U) extraction process homogenize, add 15 mL of acetonitrile with 1% acetic acid; shake for 1 minute; add contents of Supel QuE acetate extraction tube;...

LC/MS MS Analysis of Pesticides in Kidney on Chromolith® Performance 50-2mm

sample preparation A mixture of eight pesticides was prepared utilizing ACN as a solvent. (See Analysis Note for more information. ) column Chromolith® Performance 50 x 2 mm (1.52007.0001) column temp. 25 °C mobile phase [A] ACN + 0.1% FA; [B] water + 0.1% FA; gradient 20% A; to 80% A in 6 min; to 7...

GC Analysis of a 11-Component Pesticide Mix on SLB-5ms (10 m x 0.10 mm I.D., 0.10 μm), Fast GC Analysis

column SLB-5ms, 10 m x 0.10 mm I.D., 0.10 µm (28465-U) oven 40 °C (1 min), 80 °C/min to 160 °C, 5 °C/min to 340 °C (2 min) carrier gas helium, 0.52 mL/min sample 11-component pesticide mix, each analyte at 0.8-2.0 µg/mL in hexane:acetone (50:50) injection 0.5 µL10:1 split inj. temp. 280 °C MSD inter...

HPLC Analysis of Carbamate and Urea Pesticides on SUPELCOSIL™ LC-8 after SPME using 60 μm PDMS/DVB Fiber

sample/matrix 3 mL water containing 8ng/mL of each analyte in 10% NaCl desorption process static, 5 min in acetonitrile:water (65:35); dynamic, valve open during run extraction immersion, 40 min, rapid stirring SPME fiber PDMS/DVB, 60 µm (57317) column SUPELCOSIL LC-8, 15 cm x 4.6 mm I.D., 5 µm part...

GC Analysis of Pesticides in Avocado on SLB®-5ms (20 m x 0.18 mm I.D., 0.36 μm) after QuEChERS Cleanup using Supel™ QuE Z-Sep+, Fast GC Analysis

sample preparation Dispersive (QuEChERS) sample/matrix Avocado spiked with pesticides at 20 ng/g extraction tube Supel QuE Acetate extraction tube (55234-U) extraction process add 25 mL of acetonitrile; shake for 1 minute; add contents of Supel QuE acetate extraction tube; shake immediately for 1 mi...

GC Analysis of Pesticides in Wine on SLB®-5ms after SPME using 85 μm Polyacrylate Fiber

sample/matrix white wine spiked with 50 ppb pesticides desorption process 250 °C for 5 min extraction immersion, room temp (30 min) SPME fiber 85 µm polyacrylate (57304) column SLB-5ms, 30 m x 0.25 mm I.D., 0.25 µm (28471-U) oven 60 °C (1 min), 15 °C/min to 100 °C, 7 °C/min to 300 °C (1 min) carrier...

GC Analysis of Pesticide Residues in Cannabis on SLB®-5ms after QuEChERS Extraction then QuEChERS Cleanup using Supel™ QuE Verde

sample preparation Solid Phase Extraction (QuEChERS, Dispersive) sample preparation place supernatant in amber low adsorption vial for GC/MS/MS analysis. sample/matrix ground cannabis, 1 gm extraction tube Supel QuE Citrate (55227-U) extraction process Add 10 mL water to sample, allow to sit for 30 ...

GC Analysis of Pesticides in Spinach on SLB®-5ms after QuEChERS Extraction then SPE Clean-up using Supelclean™ ENVI-Carb/NH2 Dual Layer

sample preparation Solid Phase Extraction (SPE) sample/matrix Spinach extract by QuEChERS, as described in the pretreatment step extraction process to 10 g homogenized spinach, add 10 mL acetonitrile, shake 1 min, add contents of Supel QuE acetate tube (55234-U), shake 1 min, centrifuge, transfer ex...

GC Analysis of Pesticides in Spaghetti Sauce on SLB®-5ms after QuEChERS Extraction then Cleanup using Supel QuE PSA/C18

sample preparation Concentrate 2 mL aliquot of cleaned extract to a final volume of 0.2 mL. sample/matrix Sample pretreatment: 10 g sample spiked at 10 ng/g; Sample:spaghetti sauce, marinara extraction tube Supel QuE Acetate (AC) tube (55234-U) extraction process Add 10 mL 1% acetic acid in acetonit...

GC Analysis of a 7-Component Organochlorine Pesticide Mix in Drinking Water on a 5% Phenyl Column after SPE using Supelclean™ ENVI™-18

sample preparation SPE (Solid Phase Extraction) sample/matrix drinking water spiked with pesticides SPE tube/cartridge Supelclean ENVI-18, 500 mg/6 mL (57064) condition 2 x 6 mL hexane:ethyl ether (1:1); 6 mL methanol; 6 mL DI water sample addition 250 mL water sample at 10 mL/min drying 10 min with...

HPLC Analysis of Nonvolatile Pesticides in Water on SUPELCOSIL™ LC-18-DB after SPE using Supelclean™ ENVI-Carb™

sample preparation SPE (Solid Phase Extraction) sample/matrix water spiked with pesticides at 10-50 µg/L SPE tube/cartridge Supelclean ENVI-Carb, 250 mg/3 mL (57088) condition 5 mL methylene chloride:methanol (80:20); 1 mL methanol; 10 mL 2% acetic acid in water (keep bed moist until sample addition...

LC/MS/MS of Pesticides in Oranges on Ascentis® Express C18 after Sample Prep using Supel™ Que Z-Sep/C18 QuEChERS sorbent

sample preparation Dispersive (QuEChERS) sample/matrix 10 g of pureed oranges (homogenized with rind); spike at 50 ppb (add 16.75 µL of a custom made pesticide mix, each analyte at 30 µg/mL) extraction tube Supel™ QuE Citrate (EN) Tube (55227-U) extraction process add 10 mL acetonitrile; shake for 1...

GC Analysis of a 19-Component Pesticide Mix on SLB®-5ms (10 m x 0.10 mm I.D., 0.10 μm), Fast GC Analysis

column SLB-5ms, 10 m x 0.10 mm I.D., 0.10 µm (28465-U) oven 40 °C (1 min), 80 °C/min to 160 °C, 5 °C/min to 340 °C (2 min) carrier gas helium, 0.52 mL/min sample 19-component pesticide mix, each analyte at 0.8-2.0 µg/mL in hexane:acetone (50:50) injection 0.5 µL, 10:1 split inj. temp. 280 °C MSD int...

US EPA Method 8141: GC Analysis of Organophosphorus Pesticides (OP-Pest) on Equity®-5, MS Detection

column Equity-5, 30 m x 0.25 mm I.D., 0.25 µm (28089-U) oven 120 °C (3 min), 5 ºC/min to 270 °C (5 min) carrier gas helium, 30 cm/sec @ 120 ºC sample 40 ng on-column of a custom organophosphorus pesticides mix injection 1 µL liner 4 mm I.D., double taper inj. temp. 250 °C MSD interface 325 °C scan r...

US EPA Method 608/8081/OLM04.2 PEST: GC Analysis of Organochlorine Pesticides on Equity®-1701 (15 m x 0.10 mm I.D., 0.10 μm), Fast GC Analysis

column Equity-1701, 15 m x 0.10 mm I.D., 0.10 µm (28343-U) oven 100 °C, 25 °C/min to 280 °C carrier gas hydrogen, 40 cm/sec constant sample 50 ppb of a 22 component chlorinated pesticide standard in n-hexane injection 2 µL, splitless (0.75 min) liner 4 mm I.D., single taper inj. temp. 225 °C detecto...

GC/MS/MS Analysis of Pesticides in Chamomile on SLB®-5ms after QuEChERS Cleanup usingSupelClean™ Ultra

sample/matrix chamomile extraction tube Supel™ Que non-buffered extraction tube (4 mg NaSO4, 1 g NaCl in 12 mL tube) (55294-U) extraction process Add 10 mL acetonitrile/IS Extraction Solvent and allow to sit 15 minutes, then shake or vortex 30 sec. Add contents of Supel Que non-buffered extraction t...

HPLC Analysis of Organo-acid Pesticides on Discovery® C8

column Discovery C8, 15 cm x 4.6 mm I.D., 5 µm particles (59353-U) column temp. 20 °C mobile phase [A] 25 mM potassium phosphate, (pH 2.3): [B] acetonitrile; (60:40, A:B) flow rate 2 mL/min injection 1 µL detector UV, 214 nm Categories Analytical Chromatography, Environmental Analysis, Organics, Pes...

HPLC Analysis of Pesticides on Ascentis® C8 (15 cm x 4.6 mm x 5 μm)

column Ascentis C8, 15 cm x 4.6 mm I.D., 5 µm particles (581424-U) column temp. 35 °C mobile phase [A] water; [B] acetonitrile gradient 35 to 75% B in 13 min; held for 5 min flow rate 1.0 mL/min sample as indicated in 2.2% 90:10 acetonitrile:acetone in DI water injection 100 µL detector UV, 254 nm C...

GC Analysis of Organochlorine Pesticides in Water on SPB®-5 after SPME using 100 μm PDMS Fiber

sample/matrix 200 ppt each in 2 mL water extraction 15 min immersed in water with rapid stirring SPME fiber polydimethylsiloxane, 100 µm (57300-U) column SPB-5, 15 m x 0.20 mm I.D., 0.20 µm (24165-U) oven 120 °C (1 min) to 180 °C at 30 °C/min, then to 290 °C at 10 °C/min carrier gas helium, 37 cm/se...

LC/MS/MS Analysis of Pesticide Residues in Dates on the Ascentis® Express RP-Amide Column after QuEChERS Extraction

sample preparation Dilute 100 µL of cleaned extract to a final volume of 1 mL in 5 mM ammonium formate/0.1% formic acid in water; transfer diluted sample to vial for LC/MS/MS analysis sample/matrix 5 g ground dates spiked with pesticides at 10 ng/g extraction process add 10 mL water and 10 mL aceton...