Method-Specific Sample Preparation for EPH Analysis

resprep_eph_crmChoose New and Improved Resprep SPE Cartridges for Complete Extractable Petroleum Hydrocarbon Fractionation

Resprep EPH fractionation SPE cartridges offer method-specific performance
for extractable petroleum hydrocarbon (EPH) analysis of soil and water samples. These new and improved solid phase extraction (SPE) cartridges completely separate aliphatic and aromatic compounds into distinct fractions, and they are guaranteed to produce background levels under the strict reporting limits of MA and NJ EPH methods. In addition, rigorous QC testing and moisture-resistant packaging ensure storage stability and superior lot-to-lot reproducibility.
Restek’s latest expansion of the Resprep sample preparation line is manufactured in a strictly controlled environment with the simple goal of giving you consistent results—every day, every time. Turn to Resprep SPE cartridges for easy, reproducible, and guaranteed extractable petroleum hydrocarbon analysis.
Order yours today at www.restek.com/resprep

Test Medical Cannabis Potency with Greater Accuracy Using Restek’s New DEA-Exempted CBDA Certified Reference Material

ffpr2597-unv_image-webAs part of our commitment to the emerging industry of medical cannabis analysis, Restek has expanded its selection of cannabinoid-related reference standards by adding cannabidiolic acid (CBDA). This 1,000 ppm standard is DEA-exempted, so there’s no need to purchase costly neat materials or to make your own standards, and it is prepared in acetonitrile, which helps maintain stability by preventing methylation of the carboxylic acid group on the molecule. Paired with Restek’s THC standards, it is perfect for the analysis of both neutrals and acids in cannabis products by LC and is a must for accurate quantification in medical cannabis potency testing and strain ID. Restek’s CBDA standard is also a certified reference material (CRM) so you know that it meets strict ISO quality requirements.
From potency to pesticides analysis, Restek offers the LC and GC chromatography columns, CRMs, accessories, and sample prep supplies—as well as technical literature and support—needed for accurate, reliable medical marijuana analysis. Learn more about Restek’s products and resources at www.restek.com/medical-cannabis and start growing your medical cannabis testing business today.
Learn more at www.restek.com/medical-cannabis

Resprep VM-96 Vacuum Manifold now Available

vm96_primageRestek is pleased to announce the launch of the new Resprep VM-96 vacuum manifold. Designed for performance, versatility, ergonomics, and accuracy, this new product is suitable for everyday solid phase extraction (SPE), supported liquid extraction (SLE), protein precipitation (PPT), and filtration applications. The unit is compatible with 96-well plates from any manufacturer and has many features that make it superior to other models. The Resprep VM-96 has a heavy-duty, stainless steel and aluminum body so it stays in place better than lighter models and is precision manufactured so parts assemble quickly and easily. The built-in viewing window allows for easy observation of plate height and drip rate, and the durable O-ring and gaskets provide leak-free seals time after time. It also includes a precision height adaptor and five shims so users can customize plate height to their exact requirements.
Order now

Apply Force to Your LC Methods with Restek’s New High-Performance Columns

Force LC ColumnsRestek’s new Force performance LC columns give you the power to maximize instrument uptime, increase productivity, and transfer methods across your entire lab,  from your trusted-but-aged HPLC to the cutting-edge UHPLC you just plumbed last week. This incredibly rugged and supremely consistent column line represents the culmination of Restek’s twenty-plus years in LC dedicated to continually improving phase chemistries, lot and lifetime testing, and bonding and packing procedures.

Long-lasting and reproducible, new Force columns maintain stable retention times and peak shapes, even under the stress of elevated UHPLC pressures and rapid cycling. Premium quality is ensured by strict manufacturing and QC procedures—and backed by the strength of the Restek 100% Pure Satisfaction guarantee. And perhaps most important, Force premium LC columns are fully scalable between 3 or 5 μm HPLC and 1.8 μm UHPLC. You can easily transfer between instrument platforms and optimize methods without extensive calculations.

Available in three particle sizes, Force columns feature Restek’s most-popular and highly selective Biphenyl and FluoroPhenyl phases, as well as a general-purpose C18. Meet today’s workflow needs—and prepare for tomorrow’s—by applying Force LC columns to all of your instrument platforms.

Learn more and order today at www.restek.com/force

Building the Foundation of Medical Cannabis Testing – Understanding the Use of Standards and Reference Materials – Part 2

Author: Joe Konschnik

Restek Corporation

Published By: Cannabis Industry Journal

Year of Publication: 2016

Link: https://www.cannabisindustryjournal.com/column/building-the-foundation-of-medical-cannabis-testing-understanding-the-use-of-standards-and-reference-materials-part-2/

Abstract:

In the last article I referred to the analogy of the analytical reference material being a keystone of the laboratory foundation, the stone upon which all data relies. I then described the types of reference materials and their use in analytical testing in general terms. This article will describe the steps required to properly manufacture and deliver a certified reference material (CRM) along with the necessary documentation.

Building the Foundation of Medical Cannabis Testing – Understanding the Use of Standards and Reference Materials – Part 1

Author: Joe Konschnik

Restek Corporation

Published By: Cannabis Industry Journal

Year of Publication: 2016

Link: https://www.cannabisindustryjournal.com/column/building-the-foundation-of-medical-cannabis-testing-understanding-the-use-of-standards-and-reference-materials-part-1/

Abstract:

In previous articles, you may recall that Amanda Rigdon, one our contributing authors, stated that instrument calibration is the foundation of all data quality. In this article, I would like to expand on that salient point. A properly calibrated instrument will, in fact, produce reliable data. It is the foundation we build our data upon. All foundations are comprised of building blocks, and our laboratory is no exception. If we take this analogy further, the keystone to the laboratory foundation, the stone that all data relies upon, is the analytical reference material. Proper calibration means that it is based on a true, accurate value. That is what the reference material provides. In this article, I would like to expand on the use and types of reference materials in analytical testing.

Method Translation in Gas Chromatography: Get the Same Chromatogram when Changing Flow, Pressure Drop, Column Dimensions or Carrier Gas

Author: Jaap de Zeeuw, Chris English, Jack Cochran, Chris Nelson

Published By: Separation Science

Year of Publication: 2016

Link: http://www.sepscience.com/docs/Articles/Oct2016/Jaap_Method_Translation_in_GC.pdf

Abstract:

In gas chromatography there is often a need to optimize separations for the sake of resolution, analysis time or cost of analysis. This can be realized by using different column dimensions, different linear gas velocity, using a different detector or using a different carrier gas. If one wants to get the same peak elution order and the same chromatogram, one must make sure that the elution temperatures of the components are kept the same. This is only possible by adjusting the oven temperature programme. Read more to find out how you can achieve this desired result.

DiatoSorb-W Diatomaceous Earth: Great Chromatography Millions of Years in the Making

Published By: Restek Corporation

Year of Publication: 2016

Link: http://www.restek.com/Technical-Resources/Technical-Library/Petroleum-Petrochemical/General_GNAR2326-UNV

Abstract:

This technical article introduces DiatoSorb-W, a new diatomaceous earth solid support for packed GC columns. Virtually unlimited in supply—but only available from Restek—new DiatoSorb-W diatomaceous earth offers a reliable alternative for packed column users. After years of dealing with supply shortages and inconsistent product quality, analysts who depend on diatomaceous earth columns now have a reliable new source. Restek now uses DiatoSorb-W as the exclusive replacement to the diatomaceous earth that was previously used in our standard and Silcoport W GC packed columns lines. All DiatoSorb-W material undergoes rigorous quality testing to ensure high purity and dependable performance. DiatoSorb-W material is available in acid-washed (WAW), non-acid washed (WNAW), and high-performance (WHP) varieties.

Analysis of Biodiesel Fatty Acid Methyl Esters (FAME) in Aviation Jet Fuels Using Method IP 585

Author(s): Katarina Oden and Jan Pijpelink

Restek Corporation

Published By: Restek Corporation

Year of Publication: 2016

Link: http://www.restek.com/Technical-Resources/Technical-Library/Petroleum-Petrochemical/petro_PCAN2559-UNV

Abstract:
Accurate analysis of biodiesel FAME in jet fuel is critical for ensuring that contamination levels do not exceed allowable limits. Method IP 585 is commonly used for this analysis and, here, we perform the method using a Stabilwax column and GC-MS in SIM mode. Method calibration curve criteria were met and good recoveries of the total FAME content in jet fuel were obtained.