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Technical Documents(34)
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Gas chromatography(33)
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Mass selective detector(39)
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Nuclear magnetic resonance spectroscopy(1)
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Oligonucleotide microarrays(1)
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Polymerase chain reaction(3)
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Purge and trap(1)
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39 matches found for mass_selective_detector

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

Related Articles • Reporter US Volume 33.1 (4 Mb PDF) • Rapid Cleanup of Spinach Extracts Using Gravity Elution SPE Prior to Pesticide Analysis • Recovery & Sample Cleanup of Pesticides in Spinach Using Supelclean ENVI-Carb-II/PSA SPE • Extraction and Analysis of Neonicotinoid Pesticides from Flower...

SPME-GC-MS Determination of Phthalate Esters in Ramen Noodle Flavor Packets

In June of 2011, food safety authorities in Hong Kong found phthalate ester contamination in a variety of imported food and drink products1. Among these foods were several brands of ramen noodle kits. Specifically, there was concern with the presence of bis(2-ethylhexyl) phthalate (DEHP) in the oil-...

Rapid Separation of Anthocyanins and Flavonol Glycosides Utilising Discovery® DSC-MCAX Solid Phase Extraction

• • Download PDF • Contributed Article Rockhurst University, Kansas City, MO, USA About Flavanols and Anthocyanins Flavonols and anthocyanins are water-soluble vacuolar flavonoid compounds that are synthesized by organisms of the plant kingdom. Flavonoids are widely distributed in plants fulfilling ...

Glycine Hydrochloride for Cell Culture

• • Download PDF • PharmaGrade, manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production. Suitable for cell culture. • Product Regulatory Datasheet • Cherokee Buffers Quality Overview • Cherokee Buffers Site and Supply Chain Security Overview 1. Gen...

2D GC-MS Determination of Allergens in Fragrances

Related Articles • Reporter US Volume 33.4 (4 Mb PDF) • Volatile Profiles of Honeys Using HS-SPME-GC-MS • Assessing the Benefits of a “Hike in the Mountains” Using SPME Introduction Perfumes are complex mixtures comprising essential oils, aroma compounds, fixatives, and solvents. Contact dermatitis,...

Choosing the Proper Ferrules for Your Capillary GC Column

Choosing the Proper Ferrules for Your Capillary GC Column Each GC instrument manufacturer requires a ferrule with different dimensions; hence, you may find that ferrules are usually not included in the box with a supplied capillary column. Additionally, mass spectrometer detectors may require the us...

Residual Solvents from Food Packaging

• • Download PDF • Two new standards contain twenty-five solvents of interest for food safety and regulation Establishing, regulating and monitoring food safety are among the most important applications of analytical chemistry and chromatography. Food analysis covers myriad subjects, including compo...

Sampling Technique for Qualitative Volatile Headspace Outgassing from Solid Matrices

Introduction Volatile compounds in solid samples have always presented a challenge for the chromatographer to analyze. The common approach of testing by static headspace is limited by the compound concentration and sample volume. Selective solvent extraction is another common sample preparation tech...

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

Analytix Reporter Issue 1 | 2018 Products & Related Products • View Product List • Turmeric Standards • Supelclean™ Ultra SPE • Solvents • SLB GC Columns • Ascentis Express HPLC Columns • QuEChERS - Dispersive SPE Tubes Related Links • Pesticide Analysis • Food & Beverage Analysis Related Articles •...

Genomic Analysis of Formalin-Fixed Paraffin Embedded (FFPE) Tissues through the use of Whole Genome Amplification (WGA)

The past is a source of knowledge, and the future is a source of hope. S. Ambrose (1936-2002) Preserved samples from medical, forensic, museum and other archival collections represent a rich source of study material, much of it meticulously collected, characterized and preserved through many decades...

Rugged and Reproducible Solid Phase Microextraction (SPME) Sampling

Supelco® SPME fibers with Carboxen®/Polydimethylsiloxane (CAR/PDMS) and Polydimethylsiloxane/ Divinylbenzene (PDMS/DVB) coatings are now available on a nitinol core (NIT) in a SS assembly for improved fiber performance. Selectivity of the CAR/PDMS and PDMS/DVB SPME fibers has been maintained for sea...

Low Bleed - Supelco GC & GC-MS Capillary Columns

The Proof: Low Bleed The low bleed character of SLBms columns is the result of Unique Advances in Polymer Synthesis and the Innovative Manufacturing Processes that we established for these columns. Column bleed is a result of stationary phase fragments releasing from the inside wall of the column. T...

Dual Column Analysis of Organochlorine Pesticides Using SLB-5ms and SPB-608

Katherine Stenerson Senior Applications Chemist The analysis of low levels of organochlorine pesticides by US EPA Method 8081 demands the use of an electron capture detector (ECD), which is highly sensitive, and capable of detecting analytes at picogram levels. The highly sensitive nature of an ECD,...

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...

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

Analytix Reporter Issue 6 | 2019 Related Products • View Product List • Supelclean™ Ultra SPE • Solvents • SLB® GC Columns • Ascentis® Express HPLC Columns • QuEChERS Products • Pesticide Reference Materials Related Links • Pesticide Analysis • Food & Beverage Analysis Related Articles • Analysis of...

Exactly Why is Low Bleed Important for Capillary Columns?

Michael D. Buchanan Product Manager, Gas Chromatography Capillary column manufacturers often use the term ‘low bleed’ to describe their columns. How exactly does ‘low bleed’ relate to the needs of end-users? Low detection limits, positive mass spectral identifications, and instruments that are not d...

GC Column Selection Guide

Achieve Optimal Method Performance Table of Contents The History of Supelco and the Capillary Column How to Choose a Capillary Column Additional Reading/Product Literature Column Phase Selection by Industry Column Phase Selection by Application Cross-Reference Chart Capillary Columns by Phase Tradit...

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

Related Links • Food & Beverage Related Products • Supelclean EZ-POP Related Articles • Reporter US Volume 33.3 (4 Mb PDF) • Analysis of PCBs in Fish Oil Using Supelclean EZ-POP NP, Silica Gel SPE, and an SLB-5ms GC Column • Improved Recoveries and Lower Background for the Analysis of PAHs in Olive ...

radiello® Diffusive Air Sampling Application - VOCs Thermally Desorbed

radiello Table of Contents Yellow diffusive body Product No. RAD1202 Supporting plate Product No. RAD121 Vertical adapter Product No. RAD122 (optional) Adsorbing cartridge Product No. RAD145 Or try: VOCs Thermally Desorbed Starter Kit Product No. RAD145S • 1 Support plate • 1 Yellow diffusive body •...

Whole Genome Amplification for Single Cell Biology - Technical Article

The ultimate biological unit lies within a single cell. Many biological disciplines have taken aim to elucidate the causes of cellular differentiation at this level. The secret triggers that signal human maturation, regeneration and genetic diseases all lie buried in a single cell that was originall...

Capillary Column Ferrule Selection and Installation

Robert F. Wallace To provide a leak-tight seal, the ideal gas chromatography (GC) ferrule will accommodate column outside diameter (O.D.) variations, seal with minimum torque, and not stick to the column or fi ttings. The proper selection of any GC ferrule should be based on com...

Analysis of alkylphenols and alkylphenol ethoxylates.

Analysis of alkylphenols and alkylphenol ethoxylates using new 13C-labeled and deuterated internal standards according to ISO 18857-2 Alkylphenols are starting materials for the synthesis of alkylphenol ethoxylates, which are commonly used as non ionic tensides, dispersive agents in paper and leathe...

Analysis of Bisphenol A in Food by Solid Phase Microextraction Using an Overcoated Fiber

Introduction Bisphenol A (BPA) is commonly used for food packaging applications such as polycarbonate bottles, and the linings of metal cans used for soups, juices, etc. It is a suspected endocrine disruptor, and thus low level, long term exposure as a result of migration into food from packaging ma...

Whole Genome Amplification for Single Cell Biology - Life Science Innovations

• • Download PDF • Sigma-Aldrich Corp., St. Louis, MO, USA The ultimate biological unit lies within a single cell. Many biological disciplines have taken aim to elucidate the causes of cellular differentiation at this level. The secret triggers that signal human maturation, regeneration and genetic ...

Single Molecule Detection with Atto 647N NTA

Ruud Hovius, Emmanuel Guignet, Jean-Manuel Segura, Joachim Piguet & Horst Vogel (Institute de Science Biomoleculaire, EPFL, Switzerland), Monika Bäumle (Sigma-Aldrich Switzerland) • Atto 647N is a superior fluorescent dye for single molecule tracking experiments • Excellent photostability of the lab...

Inertness of Supelco Low Bleed GC Capillary Columns

The Proof: Inertness SLBms columns achieve their high level of inertness by virtue of a Proprietary Surface Deactivation that we apply to the fused silica tubing. Inertness, a measure of the absence of adsorptive or active sites in the column, is an important attribute in that it influences peak sig...

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

Related Products • Food & Beverage Analysis • Pesticide Analysis • Supelclean™ Ultra SPE Related Articles • Reporter US Volume 34.3 • Analysis of Pesticides in Turmeric Powder by LC/MS/MS • Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking • Extractio...

Developing a Quantitative SPME Method

Robert Shirey, Senior R&D Chemist Analysts routinely use SPME as a qualitative extraction tool but are reluctant to use it for quantification because analytes are not exhaustively extracted. Numerous publications have shown that SPME can quantify samples if good procedures are followed. This study w...

Consistent Performance of Supelco Low Bleed GC Capillary Columns

The Proof: Consistency The very consistent nature of SLBms columns can be traced to the Innovative Manufacturing Processes that we have established for these columns. Today’s GC analysts rightly expect to receive high quality columns on which fundamental performance parameters have been rigorously t...

Approaches to the Analysis of the Oregon List of Pesticides in Cannabis Using QuEChERS Extraction and Cleanup

Consumption of cannabis and / or cannabis-based products is currently legal in some form in 33 US states plus the District of Columbia. Testing of the plant materials and products is required by many of these states; however the specific test methods and target compound lists are not mandated in all...