pesticides

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Neonicotinoids Pesticides and Metabolites

Sigma-Aldrich.com presents an article concerning Neonicotinoids Pesticides and Metabolites.

Comparison of QuEChERS Products for the Extraction of Planar Pesticides from Spinach

Supel™ QuE Verde combines a novel carbon with zirconia coated silica (Z-Sep+) to provide an optimum balance between planar pesticide recovery and color removal.

Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking

Analysis of Pesticides in Baby Food by Solid Phase Microextraction (SPME) Using a New Overcoated Fiber

A direct immersion SPME method using a new overcoated SPME fiber was developed for the extraction of pesticides from pureed prune baby food.

QuEChERS Method for Pesticide Residue Analysis

QuEChERS method for pesticide residue analysis requires only small quantities of solvent and is capable of generating recoveries of 70-120% with RSDs <5% for a wide range of compounds.

Improved Recoveries and Lower Background for GC/MS/MS and LC/MS/MS Analysis of Pesticides in Green Tea

A procedure for cleanup of green tea extracts provides low background and allowed for the analysis of more pesticides at lower levels than QuEChERS. Uses less solvents and no toluene.

Analysis of Pesticides in Turmeric Powder by LC/MS/MS and GC/MS/MS after Cleanup with Dual-Layer SPE Cartridge

Pesticide residue testing of turmeric and other (dried) spices is challenging due to their complex compositions and high matrix. An efficient SPE clean-up can be achieved by a new Dual-layer cartridge.

Pesticide Standards For Food & Environmental Analysis

Analytical Standards & Certified Reference Materials

Chiral Separation of the Pesticide Diniconazole by Supercritical Fluid Chromatography (SFC)

Diniconazole is a pesticide commonly used as a fungicide to prevent various plant diseases. It is a chiral compound that exists as a pair of enantiomers. This article describes the use of ChromegaChiral™ columns in resolving the two diniconazole enantiomers

Analysis of Pesticide Residues in Cannabis Using QuEChERS Extraction and Cleanup Followed by GC/MS/MS Analysis

Compared to conventional PSA/C18/GCB cleanup, cannabis extracts cleaned with the Supel QuE Verde mixture showed lower GC/MS background, and better recoveries for many pesticides.

Analysis of Pesticide Residues in Ginger Powder Using QuEChERS Extraction and Clean-up with a Novel Dual Layer SPE Cartridge

The odor and pungency of ginger is due to the presence of terpenes, gingerols and shogaols. These compounds contribute to the highly complex matrix of ginger, which subsequently presents a challenge in low level analyses of contaminants. A novel 2-layer

Analysis of Pesticide Residues in Pistachios Using QuEChERS Extraction and Cleanup with Supel™ QuE Z-Sep+

Pistachios contain approximately 45% fat, which can result in a significant amount of coextracted matrix in the acetonitrile extract generated using the QuEChERS procedure. A zirconia based adsorbent significantly reduces coextracted matrix prior to LC-MS or GC-MS.

Improve Pigment Removal and Decrease Matrix Interferences for Pesticide Determination in Oranges Using Supel QuE Z-Sep/C18 QuEChERS Sorbent

The comparison of Supel™ QuE Z-Sep/C18, PSA/C18, and PSA QuEChERS sorbents, in terms of color removal and analyte recovery, is described for the cleanup of oranges prior to pesticide analysis.

QuEChERS样品制备方法

QuEChERS是一种“快速、简便、经济、高效、耐用且安全”的样品纯化方法，可用于制备食品业和农业农残分析样品。QuEChERS 基于固相萃取（SPE）样品制备技术。

Determination of Neonicotinoids in Honey using a Chromolith RP-18 HPLC column and UV Detection

Method Validation for Determination of Chloramphenicol in Urine Using Molecularly Imprinted Polymer (MIP) SPE

The method for determination of low concentrations of chloramphenicol in bovine and porcine urine was developed. Sample cleanup was performed by Molecular Imprinted Polymer (MIP) columns. Confirmatory analyses were conducted using GC/MS-NCI after derivatisation (silylation). The described method was fully

Chemical Analysis for Food and Beverage

Discover the application of analytical techniques involved in the chemical analysis of food and beverages for safety, authenticity, and quality assurance.

Flame Retardant Analytical Standards

Flame Retardant Standards: PBDE Standards. Polybrominated diphenyl ether standards accompany our chromatography products for this important analysis.

Quick, Sensitive LC/MS/MS Analysis of Aflatoxins in Cannabis

Analyte recovery values from spiked cannabis extracts ranged from 102 to 127% with RSD below 12% for 3 replicates. Excellent recovery values were even observed for Aflatoxins B2 and G2 which were spiked at a low level of 6.1 ppb.

Soil, Solid Waste & Groundwater Testing

Soil and groundwater testing are crucial to avoid adverse impact on the environment and human health. Learn about the importance of solid waste management and methods used for soil and groundwater testing for heavy metals and other environmental pollutants.

Thin Layer Chromatography

Thin layer chromatography (TLC) is a separation technique based on differential partitioning of compounds between a solid surface, coated with a thin layer of adsorbent, and a liquid solvent that moves over the solid surface by capillary action.

Bioanalysis with SPME

Biocompatible SPME devices employ C18 bonded porous silica sorbent particles, in a binder which resists fouling by biological matrix components

Halogenated Heterocycles

Shop our diverse portfolio of halogenated heterocycles for use in a vast array of synthetic protocols, including lithiation and palladium catalyzed cross-coupling methodologies.

Low Pressure Liquid Chromatography

Low pressure liquid chromatography (LPLC) is a chromatographic technique that operates at low pressures to drive the mobile phase onto the column containing a stationary phase by the action of a pump.

Air Sampling & Monitoring

Air sampling and monitoring are used to measure the level of air pollutants in environmental, industrial, or indoor settings to assess the air quality per standards established by health and regulatory agencies.

Ion-Suppression & Phospholipid Contamination

We are presenting an article focusing on ion-suppression and phospholipid contamination and some of their major causes and difficulties.

Replace Classical Liquid-Liquid Extractions with EXtrelut® NT

Simplify your liquid-liquid extractions with our emulsion-free supported-liquid extraction (SLE) single step solution.

High Purity Carbon Adsorbents for Sample Preparation and Chromatographic Applications

Carbon Molecular sieves (CMS) are a versatile range of adsorbents that can be tailored for specific applications. Supelco® scientists have been synthesizing synthetic CMS carbons for several decades, starting from tailoring of the starting polymers/copolymers, to modifying the final properties

Cannabinoid Analysis of Hemp: Developing an Efficient HPLC Method Workflow

Several different HPLC method options are explored for the efficient and time effective analysis of cannabinoids in a sample of hemp flower. The differences between gradient and isocratic analyses are explored, and the two methods are compared in determining the

Supel™-Select Polymeric SPE

Supel-Select HLB SPE - a hydrophilic modified styrene based polymer developed for the solid phase extraction of a broad range of compounds from aqueous samples.

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