Chromatography 13 Safety Coated Glass Mobile Phase Reservoir Bottles
MicroSolv Technology’s™ collection of borosilicate glass, mobile phase bottles for HPLC, meet general laboratory safety standards. The exterior of these bottles is coated with a transparent, thick epoxy plastic. If dropped and broken, the plastic can prevent a spill incident, saving clean-up time and workers from being splashed with solvent or glass.
This special plastic coating is available on various bottle sizes including: a 1L, Standard 29/32 Taper Neck and bottles with a GL45 neck in 1L to 10L formats. Each GL45 neck bottle is supplied with a ‘drip ring’ and an inert closed screw cap. Compatible with many mobile phase fi ltration devices, you can safely fi lter directly into these bottles and cap them for storage or transportation. More information online:
ilmt.co/PL/3p9B
57422pr@reply-direct.com Highly Accurate Quantifi cation of Liquid Hydrocarbons with a Wide Boiling Point Range
The Polyarc/FID from JSB is a powerful tool for identifi cation and quantitation of compounds that are impossible to obtain to prepare external calibration standards. It is ideal for complex/natural samples or experimental reaction products.
An Application Note available from JSB demonstrates the use of the Polyarc™/FID for quantitative analysis of hydrocarbons without the need for calibration standards. The accuracy of the Polyarc™/FID is compared with an FID-only analysis. It also explained how to mitigate inlet issues that can lead to analysis inaccuracies.
In the study the authors analysed a solution of 13 n-alkanes with known concentrations with the Polyarc™ reactor. N-decane was used as an internal standard to determine the concentrations of the analytes assuming relative response factors per carbon of unity. The maximum error between the actual concentrations and the concentrations determined with the Polyarc™ reactor was 2.4%, with an average error of 0.9%.
For accurate analysis of sample composition, the ratio of components in the injected sample must remain constant during the injection onto the column and to the detector. Preferential vaporisation of components in the injector of the GC can result in analysis inaccuracies. Traditional calibrations can absorb some of these errors, but only when similar mixtures are used for calibration, which is rarely the case. These errors go unnoticed with traditional analysis and calibration techniques. However, with the PolyarcTM reactor it is possible to both detect and fi x this problem by measuring the FID response to a sample with analytes that have a large range in boiling temperatures and known concentrations.
The authors concluded the Polyarc™ reactor allows for the accurate and facile quantifi cation of hydrocarbons with a wide range of boiling points and carbon content. The accuracy of the Polyarc™ system to analyse compounds without calibration is unparalleled in the fi eld of analytical chemistry making this tool useful for a variety of industries where accuracy is important and calibration is cumbersome, expensive and/or impossible. Furthermore, the authors found that the analysis of standard mixtures with the Polyarc™ reactor allows for the detection of issues in the GC system including preferential inlet vaporisation and leaks.
Contact JSB to learn more about Polyarc™ microreactor technology. More information online:
ilmt.co/PL/jAVl
57116pr@reply-direct.com
New Standards for Enhanced Terpenes Analyses
Terpenes are aromatic compounds responsible for the characteristic aromas and fl avours of most plants. Beyond their effects on smell and taste, terpenes are also being investigated for having potential therapeutic properties. The possibility of these effects in matrices including hemp, cannabis, hops, essential oils, and food has created a growing demand to profi le these compounds.
Featuring 59 compounds across two ampuls, Restek’s new Terpenes MegaMix standards help labs analyse an extensive terpenes list without needing to combine
multiple mixes or terpene singles. These new standards contain mono, sesqui, di, and tri compounds, enabling a comprehensive determination of terpenes across matrices. A high concentration of 2500 µg/mL, achieved through rigorous material purifi cation and characterisation, provides additional fl exibility in constructing calibration curves.
Restek’s Terpenes MegaMix standards are certifi ed reference materials (CRMs), manufactured and QC-tested in ISO-accredited labs. Verifi ed composition and stability ensures long-lasting shelf life, and two independently produced lots satisfy your ISO requirements.
Available in two ampuls, Terpenes MegaMix Standard #1 and Terpenes MegaMix Standard #2 are ideal for the analysis of terpenes in hemp, cannabis, hops, essential oils, and other botanical matrices.
More information online:
ilmt.co/PL/Ek19 56401pr@reply-direct.com
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