105-40-8

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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.

Column Packing and Preparation for Size Exclusion Chromatography

Thermal Transitions of Homopolymers: Glass Transition & Melting Point

Literature values for the glass transition temperature, (Tg), and melting temperature, (Tm), are given for the more common homopolymers.

LC/MS/MS Method for Determination of Glyphosate, AMPA, and Glufosinate in Cereals

Glyphosate and related compounds are measured in oatmeal and infant cereal using ion-exchange polymer-based particles for HPLC and SPE. Low level detection was obtained.

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.

Analysis of Polychlorinated Biphenyls in Fish Oil Using Supelclean™ EZ-POP NP, Silica Gel SPE, and an SLB®-5ms GC Column

Polychlorinated biphenyls (PCBs) were once widely used in many industrial and commercial applications such as insulating fluids, dielectrics, and lubricants. This included their extensive use in electrical transformers. PCB use has been banned in many countries, and the Stockholm Convention

Particle Size Conversion Table

Particle size conversion table from our Lab Basics Technical Library

Micro and Nanometer Scale Photopatterning of Self-Assembled Monolayers

Self-assembled monolayers (SAMs) have attracted enormous interest for a wide variety of applications in micro- and nano-technology. In this article, we compare the benefits of three different classes of SAM systems (alkylthiolates on gold).

How to Run an mPAGE™ Protein Gel Using a Bio-Rad Electrophoresis System

Instructions for setting up an mPAGE SDS-PAGE precast protein gel for gel electrophoresis using a Bio-Rad Mini-PROTEAN® electrophoresis system.

A Comparison of Two Solid Phase Extraction Methods for the Analysis of Polyaromatic Hydrocarbons in Butter

Analysis of PAHs in butter can pose a special challenge due to the high fat content and the lipophilic nature of PAHs.

Teriparatide Peptide Mapping Analysis by Liquid Chromatography-UV-Mass Spectrometry

This application note describes a step-by-step LC-UV-MS workflow for teriparatide peptide mapping, that includes enzymatic digestion, separation conditions, and their high resolution QTOF mass spectrometer based identification.

Improved Determination of Volatile Organic Compounds in Water by SPME and GC/MS: ISO Standard 17944

High performance, reliability, and reproducibility of HS-SPME in combination with GC/MS for the determination of VOCs in water was proven in an interlaboratory trial. The new ISO 17943 using HS-SPME is an improvement on existing official methods for this determination

Attachment Factors for 3-Dimensional Cell Culture

Boc Resin Cleavage and Deprotection

The most popular reagent for cleavage of peptides from Boc-based resins is anhydrous HF. Of all the cleavage procedures HF appears to be the most versatile and least harmful to a wide variety of peptides synthesized on Boc-based resins.

Allenes

The past couple of decades have witnessed a surge in the popularity of allenes as viable building blocks for a wide variety of synthetic applications. Their versatility allows them to participate in nucleophilic and electrophilic additions, cycloadditions and cyclizations, as

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.

Extractables Study with LC-UV/MS

Reliable identification and quantification of unknown extractables of a single-use system (SUS) with a 21 component CRM mix for liquid chromatography (LC-UV/MS) methods using Ascentis® C18 column.

Precise Nanoparticles for Optoelectronics Applications

Inorganic nanomaterials are tunable by size, shape, structure, and/or composition. Advances in the synthesis of well-defined nanomaterials have enabled control over their unique optical, electronic, and chemical properties stimulating tremendous interest across a wide range of disciplines. This article illuminates

New Conducting and Semiconducting Polymers for Plastic Electronics

In the emerging field of organic printable electronics, such as OLEDs and organic photovoltaics (OPVs), there is a significant need for improved organic conducting and semiconducting materials. This paper reports our recent progress in two fields: 1) the development of

Periodic Table of the Elements

Download the Periodic Table of the Elements with names, atomic mass and number in printable .pdf and image format. Use the periodic table chart by element names in alphabetical order for quick research, reference and lab use.

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

Serotonin Receptors

We offer many products related to serotonin receptors for your research needs.

Oxygen & Nitric Oxide Probes

Our company's Detection Chelators and Ion Probes products are reviewed including oxygen and NO probe products, oxygen probes and NO probes.

Perovskite-type Oxide Materials

Thermoelectric Performance of Perovskite-type Oxide Materials

Sample Preparation for Affinity Chromatography in Specific Groups of Biomolecules

Nanostructured Olivine-based Cathode Materials for Lithium-ion Batteries

Due to the adverse impact of the continued use of fossil fuels on the earth’s environment and climate, researchers have been asked to develop new approaches for producing power using renewable sources like wind and solar energy

Sample Preparation in Ion Exchange Chromatography

This page clarifies sample preparation, buffer exchange and desalting, removal of lipoproteins, phenol red, and low molecular weight contaminants in Ion exchange chromatography.

Intermetallic Hydrides with High Dissociation Pressure

Interaction of hydrogen with multi-component intermetallic compounds of AB5- and AB2-type were studied in the current work. Several new intermetallic hydrides with potential applications in high-capacity hydrogen storage have been identified and fully characterized using a gas-volumetric analytical technique.

MAPKs

We offers many products related to MAPKs for your research needs.

Thermoelectric Performance of Perovskite-type Oxide Materials

The prevailing strategies for heat and electric-power production that rely on fossil and fission fuels are having a negative impact on the environment and on our living conditions.

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