6 GC-MS Air Analyser for Very Low Concentration Determination of VOCs in Indoor and Ambient Air to Method TO-17
A new instrument for the automated, in situ, determination of airborne volatile organic compounds (VOCs) using the OPTIC-4 Multimode Inlet for gas chromatography has been introduced by GL Sciences BV and ChromaVision. The technology features a sorbent tube placed as an injection port liner which can be repeatedly used to collect samples of air, with the trapped analytes being subsequently desorbed onto a capillary gas chromatography (GC) column without the use of intermediate cryogenic refocusing. As the system has no need for any liquid nitrogen or CO2
, there is no need for adsorption/desorption tubes. It is possible to set a continuous run so that for on-line analysis the system can run 24-7.
Using a multi positioning valve, the system can select between standards or taking sample directly from the outside via, e.g., a probe on the roof of a mobile lab. Sampling is done during a fi xed time with a constant fl ow controlled with a mass fl ow controller. Once the sampling period is fi nished, the carrier gas fl ow via the injector port is re-established. Following this, the injection port is heated to desorb the analytes from the injection port liner for transfer to the GC capillary column. In parallel with heating the injection port liner, the GC–MS analysis is started.
A home-made mixture of 63 compounds (comparable to the TO-17 mixture) is used for evaluation of the Air Analyser. Via a smart valving system, sample is loaded from bottom-to-top on the OPTIC Air Liner, being located inside the injection port at a temperature of 25°C The injection port is cooled with compressed air. Sampling is done during three minutes at 75 ml/min (total sample volume = 225 ml). After sampling, the carrier gas is re-routed through the injection port from top-to-bottom. Following this, the injection port is heated to 270°C, desorbing the trapped compounds to the capillary column using spitless transfer. The resulting chromatogram starts with n-Propane and ends with Naphthalene. Since the sample trap is in the injection port, no additional cryogenic focusing is required at the head of the capillary column.
More information online:
ilmt.co/PL/qa9m 55880pr@reply-direct.com
Optimised Refractive Index Detectors for HPLC and GPC/SEC
Testa Analytical Solutions eK reports on growing interest in OEM versions of its Differential Refractive Index (DRI) detector to enhance the performance of both HPLC and GPC/SEC systems.
Charlotte Stentzler, Technical Manager of Testa Analytical, said: “We have invested in stock components to enable us to offer our high performance DRI detectors, made here in Germany, on short delivery times. Being able to offer a wide range of options (light source, electronics, fi rmware) means these DRI detector can be readily adapted to fi t the requirements of any third party HPLC or GPC/SEC system. Our DRI detector has been repeatedly shown to improve the accuracy and reliability of most chromatography systems when determining absolute concentration and total mass balance. Operating from room temperature up to 80°C with an outstanding thermal stability, the DRI detector also offers unsurpassed baseline stability and fast setting. Its sensitivity makes it the perfect RI detector to integrate into modern GPC/SEC and HPLC systems and to achieve peak performance even in the most challenging applications.”
She added: “The fl exibility of our detector design has enabled us to supply OEM versions to suit a wide range of requirements ranging from low fl ow rate (down to 300 µL/min) as well as for standard HPLC and GPC/SEC applications. We are able to offer OEM supply agreements for the DRI detector starting at low yearly volumes, which makes it the perfect match for organisations focusing on supplying systems for niche chromatography applications.”
To discuss integrating an optimised version of the DRI detector into your GPC/SEC or HPLC system please contact Testa Analytical Solutions. More information online:
ilmt.co/PL/pk2y
57175pr@reply-direct.com
New Sample Prep Solution Simplifi es Food Safety Testing
Food industry, government and contract testing laboratories performing food safety analysis can now benefi t from a new portfolio that offers cost- effective, robust Solid-Phase Extraction (SPE) solutions to support food safety workfl ows and meet regulatory requirements across Europe, Asia and the Americas.
The Thermo Scientifi c QuEChERS product line provides an easy-to-use, sample preparation workfl ow, with sample extraction and cleanup kits that allow for comprehensive pesticide residues extraction to produce cleaner extracts for chromatographic analysis. With pre-weighed, high-quality salts and sorbents, specifi cally designed to eliminate salt clumping during sample preparation, laboratories will achieve reliable and reproducible results, allowing them to meet regulatory food safety requirements. The collection includes 48 new products for Original, Association of Offi cial Analytical Chemists (AOAC) and European methods and are available in convenient pouches or prefi lled tubes, giving users a wide range of choice to fi nd the sample preparation solutions to best suit their needs.
“Regulatory requirements for food safety analysis are becoming more and more stringent. The new QuEChERS collection provides a comprehensive sample preparation workfl ow that give laboratories confi dence that their analysis is reliable and repeatable, and will ensure foodstuffs meet the safety regulations,” said Ken Meadows, Global Product Manager, Sample Preparation Products, Thermo Fisher Scientifi c.
The Thermo Scientifi c QuEChERS line provides a high level of versatility in a cost-effective manner and can be utilised across various applications within the food safety space, including pesticide residues analysis, veterinary drugs analysis and mycotoxins analyses. Effective sample preparation is crucial in producing reliable results from liquid chromatography-mass spectrometry analysis, and the QuEChERS portfolio supports the safeguarding of consumer health from potential contaminants.
More information online:
ilmt.co/PL/6Eem 56965pr@reply-direct.com
Streamlined Solutions for Natural Product Purifi cation
Since 1957, Gilson has been providing highly fl exible, reliable, and cost-effective solutions for science-based industries. Below is a selection of the most popular instruments making the highest contribution to your natural product purifi cation. Designed to integrate with your workfl ow, these systems set the standards for the industry and are complemented by worldwide service and support network.
The VERITY CPC Lab system combines a PLC Purifi cation System with a centrifugal partition chromatography (CPC) system for high-level target compound purifi cation. This automated, cost-effective, liquid-liquid purifi cation technique utilises reusable, silica-free chromatographic columns to streamline your workfl ow and allow you to isolate specifi c molecules with high yields and purity quickly.
The VERITY CPC Pilot system performs silica-free chromatography for pilot-scale purifi cation. This is the ideal CPC solution for annually processing milligrams up to multi-kilograms of natural product extracts with 95% recoveries and 99% purity or better. The system is a perfect fi t with Gilson LC purifi cation systems. For more effi cient pumping, the VERITY CPC Pilot system can be combined with a binary injection pump.
The VERITY CPC Process system performs silica-free (environmentally friendly) chromatography for industrial molecule purifi cation and extraction in pharmaceutical, cosmetic, food, and natural extract industries. This is the most advanced CPC solution for annually processing tons of natural product samples with the greatest returns for mainstream and minor cannabinoids. The system is designed to comply with the highest regulatory and safety standards (EU -UL, GMP -ISO, ATEX -HAZLOC) and allows maximised solvent recovery. The VERITY CPC Process system includes Gilson’s latest generation of LC SKID systems.
More information online:
ilmt.co/PL/y33R 56629pr@reply-direct.com
INTERNATIONAL LABMATE - APRIL 2022
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68
