Rxi®-624Sil MS (Fused Silica) GC columns
Rxi® fused silica capillary GC columns were designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity.
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Every lab has these as a core asset.
Residue solvent in pesticide technical materials and impurity profiling
Accurate, reliable, rugged column for routing impurity profiling of agrochemical raw materials and five batch technical materials.
Review Date: 24 Jul 2021 | Restek Corp.
The Rxi-624 Sil MS column is great for terpenes analysis in cannabis products.
Analyzing terpenes and residual solvents on cannabis products
The product achieves high quality and reproducible results.
Review Date: 23 Jul 2021 | Restek Corp.
Love it! Would not go back to my old column.
VOC Analysis
Great column. Can go to higher temperatures which is always good.
Review Date: 14 May 2021 | Restek Corp.
This column is the heart of my GC separations.
Pharmaceutical drug substances analysis
A very rugged column with good reproducibility of retention/results and low bleed even at very high temperature. Life of thease columns is very good. I found that column to column variability is very low. The cost of the column is a little bit high but worth buying.
Review Date: 16 Jul 2020 | Restek Corp.
Very great product, thank you.
Determination of API and its metabolites in biological fluids and materials
Very effective product. Always use in my research laboratory. I advise using these products to my colleagues.
Review Date: 10 Dec 2019 | Restek Corp.
Highly recommended column for oxygenated C3 analysis.
Analysis of oxygenated C3 products
Excellent column for the analysis of lower alcohols and oxygenated C3 products. Additionally, one of the few columns to go up to temperatures of 300°C and at the same time provide the desired separation.
Review Date: 10 Dec 2019 | Restek Corp.
It is a tremendous tool for GC separations. Very reliable.
Pharmaceuticals
Basically, the separation of USP Class II residual solvents acetonitrile and methylene chloride is fantastic - always higher than 1.5, going up to a 2.1 resolution. The column is tough and very durable. Currently, I have a column of about 6 years, and it is still up and running. I have used this column in different GC's and always get the same good results.
Review Date: 9 Dec 2019 | Restek Corp.
Excellent resolution and performance.
Quantification of cannabis native terpenes and residual solvents
Excellent resolution for the quantification of cannabis native terpenes and for the detection of residual solvents using HS-GC/FID Agilent 6890.
Review Date: 6 Nov 2019 | Restek Corp.
Excellent for cannabis terpenes quality control assays.
Analyze residual solvents and cannabis terpenes
This product provides suitable resolution for the analysis of cannabis terpenes assays and residual solvent tests in the ahilent 6890 GC/FID.
Review Date: 3 Oct 2019 | Restek Corp.
Good resolutions and better result of tailing.
Analyze medicines
Excellent GC columns. Midpolarity crossbond phase. Low-bleed, high-thermal stability column—maximum temperatures up to 300–320 °C. Inert—excellent peak shape for a wide range of compounds. Selective—G43 phase highly selective for volatile organics and residual solvents, great choice for USP. Manufactured for column-to-column reproducibility—well suited for validated methods.
Review Date: 3 Jun 2019 | Restek Corp.
Rxi® fused silica capillary GC columns were designed specifically to be the best columns available, for exceptional inertness, ultra-low bleed, and reproducible retention and selectivity.
In addition to outstanding performance, this combination of column characteristics assures Rxi® columns will have long lifetimes. The Restek chemists also have developed a stable, reproducible manufacturing process, so that Rxi® columns will meet your needs every time you install a new column.
Features:
- Low-bleed, high-thermal stability column—maximum temperatures up to 320 °C.
- Inert—excellent peak shape for a wide range of compounds.
- Selective—G43 phase highly selective for volatile organics and residual solvents, great choice for USP<467>. Manufactured for column-to-column reproducibility—well-suited for validated methods.
Column Specifications:
- Length: 20, 30, 60, 75, 105 m
- ID: 0.18, 0.25, 0.32, 0.53 mm
- df: 1.00, 1.40, 1.80, 3.00 μm
A Preliminary FET Headspace GC-FID Method for Comprehensive Terpene Profiling in Cannabis
This application note describes an FET headspace GC-FID method that was developed for the analysis of terpenes in cannabis. Good chromatographic separation allowed quantification of critical compounds across the volatility range, including α-pinene, β-myrcene, α-humulene, β-caryophyllene, and caryophyllene oxide.
A Fast, Simple FET Headspace GC-FID Technique for Determining Residual Solvents in Cannabis Concentrates
Due to rapid growth in the medical cannabis industry, demand is increasing for analysis of residual solvents in cannabis concentrates in order to protect consumer safety. This application note details a simple, fast test for common residual solvents using full evaporation technique headspace GC-FID and an Rxi®-624Sil MS column.
Optimized Volatiles Analysis Ensures Fast VOC Separations
In this application note, in order to provide optimized conditions for labs analyzing VOCs, parameters that ensure good resolution, while reducing downtime by syncing purge and trap cycles with instrument cycles were established. In addition, comparative data is presented that demonstrates why Rxi®-624Sil MS columns are the best choice for volatiles analysis.
Lowering Detection Limits for 1,4-Dioxane in Drinking Water Using Large Volume Injection in an Unmodified Splitless GC Inlet
This application note describes a method for the analysis of 1,4-dioxane in drinking water using an unmodified split/splitless inlet with concurrent solvent recondensation–large volume splitless injection (CSR-LVSI) to lower reporting limits without concentrating the extract. SPE is performed using Resprep® SPE cartridge from Restek for EPA method 522 then analysis by GC-MS. This CSR-LVSI technique improves detectability with no specialized equipment or changes to standard laboratory instrumentation.
What makes an aroma? A terpene story
Terpenes have become a topic of great interest in cannabis testing as scientists are trying to develop a deeper understanding of the roles they play in cannabis. They impact aromas and flavors, but there are growing beliefs that they may also enhance or suppress therapeutic benefits through what is called the “entourage effect.” Watch this video to learn more about terpenes and the analytical techniques such as gas chromatography used for analysis.
Rxi® Technology for Accurate Trace-Level Analysis and New EZGC™ Software from Restek
In this video Jaap de Zeeuw discusses two new technologies highlighted by Restek at Pittcon 2013. Jaap tells SelectScience how the exceptional inertness and stability of Restek’s Rxi® columns makes them well suited to accurate trace-level analyses. In addition to discussing some of the other key benefits of Rxi® technology, including retention time stability and longer column life, Jaap describes some of the key applications areas such as pesticide, PAH and solvent analysis. Jaap also introduces EZGC™, Restek’s new software for GC method development. Interview filmed by SelectScience at Pittcon 2013.
New Low Bleed GC Column and Flow Meter
Watch this Restek interview at Pittcon 2010 to find out about new additions to the Rxi® ultra inert, high performance fused silica GC column family. The Rxi® 6-24 Sil MS increases the maximum temperature to 320oC with very low bleed and is applicable to mass spectrometry applications. A new Flow Meter and website launch are also introduced.
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