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392 matches found for Pesticides

Analysis of Bisphenol A and Analogous Compounds in Infant Formula

Related Articles • Reporter US Volume 34.4 • Robustness of the Discovery® HS F5 HPLC Column in the Study of Metabolomics • Reaching the “Peak” of Recovery: Improving Antibody Separations with the Inclusion of Organic Alcohols • Rapid Determination of Protein Binding Affinity Using Solid Phase Microe...

Enzyme Inhibitors - Arachidonic Acid Cascade

Enzyme inhibitors are compounds that interfere with or slow down proteolytic catalysis. Competitive inhibitors bind to the active site of the enzyme and physically block or displace other substrates, preventing the biological substrate from access (antagonists). Noncompetitive inhibitors bind else...

Z-Sep Specialty Products for Challenging Matrices - Supel™ QuE (QuEChERS) Products

Supel QuE Z-Sep products enhance sample cleanup for complex matrices by effectively removing more fat and color from sample extracts than traditional phases for QuEChERS methods. By eliminating problematic matrix interferences, Z-Sep products provide more robust LC-MS and GC-MS methods. This proprie...

Sweet Poison - TraceCERT® CRM Solution for Tutin

Tutin is a toxic oxygenated sesquiterpene occurring in the tutu plant (genus coriaria) that is found in New Zealand. It is responsible for poisoning through contaminated honey, when honeybees collect honeydew produced by sap-sucking vine hopper insects that feed on the tutu plant. Therefore, the Aus...

Post Column Reaction - HPLC Accessories

Assemble your own system and Save!The equipment needed to perform postcolumn reactions can be relatively simple. These components enable you to easily and economically construct your own system. We recommend using a 5 cm x 4.6 mm column filled with 250 mm beads when peak volumnes are large. Our Mixi...

Rhamnolipids - Fatty Acyls

Rhamnolipids are well-known glycolipid biosurfactants that are microbially produced by Pseudomonas aeruginosa (P. aeruginosa) as anionic amphiphilic molecules, with (hydrophilic) mono- or di-rhamnose sugar heads and (lipophilic) -hydroxyalkanoic acid tails of varying lengths. Rhamnolipid biosurfacta...

Cholinesterase and Organophosphate Detection Reagents - Analytical and Industrial Enzymes

Cholinesterase assays have a multitude of applications including human diagnostics, drug discovery, food, environmental, and chemical terrorism detection. In human diagnostics, cholinesterase activity and inhibition is used as an indicator for organophosphate (OP) exposure or predisposed cholinester...

Analysis of Active Cannabis Compounds (Cannabinoids) in Edible Food Products: Gummy Bears and Brownies

Related Products • Solid Phase Microextraction (SPME) Related Articles • Reporter US Volume 34.4 • Robustness of the Discovery® HS F5 HPLC Column in the Study of Metabolomics • Reaching the “Peak” of Recovery: Improving Antibody Separations with the Inclusion of Organic Alcohols • Rapid Determinatio...

Food, Beverages & Water Safety Standards & Regulations

Method Name Agency Method Number Contaminant (Chemical/Analytical Analysis parameter) Target Microorganism (Microbial Testing parameter) Segment/Matrix FAME Standard for Optimizing GC System Performance AOAC FAME Standard Fatty Acids - Food, Beverages, Water NO3 B Nitrate Measurement in Water APHA A...

Analysis of Fipronil and Fipronil Sulfone in Eggs, Chicken Meat and Mayonnaise

Fipronil is a broad spectrum insecticide that is in the European Union (EU)1 not permitted to be use with food producing animals. Fipronil sulfone is formed by degradation of fipronil, and is actually more toxic to birds and other organisms than the parent compound.2 The maximum residue limit design...

Fast Extraction and Low Level Detection of Chloramphenicol in Shrimp

QuEChERS Sample Preparation Using Z-Sep+ Sorbent and Analysis by Ascentis® Express C18 LC-MS/MS Chloramphenicol is a broad spectrum antibiotic that has been determined as a causative agent of aplastic anemia and possible carcinogen in humans. These health concerns prompted a ban on the use of chlora...

Improved Recovery of Fungicide Carbendazim from Orange Juice

A QuEChERS sample preparation method followed by LC-MS/MS The fungicide carbendazim can sometimes be used to combat mold on citrus fruits including oranges. Recently, low residue levels of the fungicide were reported to be present in bulk orange juice import shipments to the USA. Because this compou...

Aminoglycoside Analysis in Pork Muscle using Molecularly Imprinted Polymer Cleanup and LC/MS/MS Detection

Aminoglycosides are a well-known class of antibiotics that are routinely monitored in animal-derived foods. Many countries have instituted regulatory limits for aminoglycosides. There is growing concern about the impact these microbial resistant compounds have on human health and development. A sens...

Extraction and Analysis of PAHs from Grilled Hamburger

Using Supel™ QuE Z-Sep QuEChERS Sorbents and SPB®-608 Capillary GC Columns Polynuclear aromatic hydrocarbons (PAHs) are compounds consisting of two or more fused aromatic rings. These compounds are lipophilic in nature, and are ubiquitous in the environment as a result of the incomplete combustion o...

A Comparison of Solid Phase Extraction (SPE) Products Used to Purify Peanut Paste Extract for Aflatoxin Analysis

Related Products • Food & Beverage Analysis • Toxins (other than pesticide/drug residues) • Supel™ Tox SPE Cartridges Related Articles • Reporter US Volume 34.2 • Quantifying Picogram Concentrations of Aflatoxin M1 in Liquid Milk using SPE Cleanup and LC/MS Analysis • Analysis of Residual Solvents i...

LC/MS/MS Analysis of Aflatoxins in Hops After Solid Phase Extraction Cleanup

Related Products • Food & Beverage Analysis • Toxins (other than pesticide/drug residues) • Supel™ Tox SPE Cartridges Related Articles • Reporter US Volume 34.1 • Analysis of Residual Solvents in Hemp Extract by Headspace SPME-GC/MS • Headspace SPME GC/MS Analysis of Terpenes in Cannabis • Quantifyi...

Florisil® - Adsorbents (Inorganic)

FLORISIL adsorbents are used in preparative and analytical chromatography, and are available in pesticide-residue (PR) and standard grades, in powdered and granular forms. All grades have a surface of 300m2/g and have been activated.

Sample Cleanup Apparatus - Extraction Glassware

Fill these columns with appropriate adsorbents when cleaning or drying environmental samples for pesticide or priority pollutant analyses - described in US EPA Protocol.

GC Solvents - Solvent by Application

Browse Sigma-Aldrich's GC Solvents to find products in GC Headspace Solvents, GC-MS Solvents, Pesticide Residue Analysis (PRA) Solvents, Purge and Trap Solvents, Solvents for GC applications

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Supelclean™ ENVI and Supelclean™ SPE Cartridges - Solid Phase Extraction (SPE)

The Supelclean and Supeclean ENVI SPE product line was developed, highly tested and quality controlled for environmental and industrial applications. Over 10 different phase chemistries are available ranging from our unique ENVI-Carb (graphitized carbon black) to our dual-layer SPE technology for m...

Headspace SPME-GC/MS Analysis of Terpenes in Hops and Cannabis

Analytix Reporter Issue 3 | 2018 Products & Related Products • View Product List • SPME Fibers & Holders • SLB GC-MS Columns • Terpenoid Standards • Phytochemical Standards Related Links • Cannabis Testing Related Articles • LC/MS/MS Analysis of Aflatoxins in Hops After Solid Phase Extraction Cleanu...

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Supelclean™ ENVI-Carb-II/PSA SPE Products - Supelclean™ ENVI and Supelclean™ SPE Cartridges

Retention Mechanism: Reversed-phase and anion-exchange Sample Matrix Compatibility: Organic or aqueous solutionsDual layer SPE tube that contains both Supelclean ENVI-Carb (upper layer) PSA (lower layer) SPE sorbents (separated by PE frit)Developed to offer superior clean up when conducting multi-r...

Supelclean™ ENVI-Carb-II/SAX/PSA SPE Products - Supelclean™ ENVI and Supelclean™ SPE Cartridges

Retention Mechanism: Reversed-phase and anion-exchangeSample Matrix Compatibility: Organic or aqueous solutionsTri-layer SPE tube that contains Supelclean ENVI-Carb (upper layer), SAX (middle layer) PSA (lower layer) SPE sorbents (separated by PE frit)Developed to offer superior clean up when condu...

Analysis of Tetrahydrocannabinol (THC) and Carboxytetrahydrocannabinol (THCCOOH) in Surface Waters by SPME and GC/MS

Related Products • Cannabis Testing • Solid Phase Microextraction • Determination of Triclosan in Environmental Waters • Determination of Bisphenol A in Drinking Water • SPME Method for 4-methyl-1-cyclohexanemethanol (MCHM) and propylene glycol phenyl ether (PPH) in Water • SPME for the Extraction o...

Supelclean™ ENVI-Carb/NH2 SPE Products - Supelclean™ ENVI and Supelclean™ SPE Cartridges

Retention Mechanism: Reversed-phase and anion-exchange Sample Matrix Compatibility: Organic or aqueous solutionsDual layer SPE tube that contains both Supelclean ENVI-Carb (upper layer) LC-NH2 (lower layer) SPE sorbents (separated by PE frit)Developed to offer superior clean up when conducting mult...

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Supelclean™ PSA SPE Products - Supelclean™ ENVI and Supelclean™ SPE Cartridges

Retention Mechanism: Normal-phase and anion-exchangeSample Matrix Compatibility: Organic or aqueous solutionsPolymerically bonded, ethylenediamine-N-propyl phase that contains both primary and secondary aminesA weak anion exchanger with a pKa of 10.1 and 10.9Similar to aminopropyl SPE phases (NH2) i...

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Whatman® high-purity glass microfiber extraction thimbles - Whatman® Extraction Thimbles

High-purity glass microfiber thimbles manufactured from 100% pure borosilicate glass are available for specialized applications. The thimbles are completely free of binders or additives and can be used at temperatures up to 500 °C or when using solvents incompatible with cellulose thimbles. These th...

Whatman® Food and Beverage Testing - Whatman®

Effective food and beverage quality control relies on a wide range of filtration, monitors, media, and separations products. Whatman offer a comprehensive range of products for sample preparation through to microbial identification. Using Whatmans unique pre-filtration technology, solutions which ...

Analysis of Residual Solvents in Hemp Extract by Headspace SPME-GC/MS

A straightforward, fast, sensitive, and accurate alternative to headspace analyzers Marijuana oil, produced by extraction of the flower buds of the cannabis sativa plant, has reputed therapeutic benefits.1,2 The extraction process typically involves solvents such as hexane or some alcohols that may ...

The Fight to Prevent Food Fraud

We all must make a certain “leap of faith” that we are actually eating what we think we are eating. Food and beverage processors and manufacturers around the world execute food safety management programs to maximize food safety, and minimize food fraud events. Food fraud (adulteration is a growing c...