Scientific equipment

Centri consumables

Centri offers high-sensitivity unattended extraction and enrichment of VOCs and SVOCs in liquid, solid and gaseous samples. There are a number of user-installable consumables that can be replaced between scheduled service visits to help maintain the system, and racks that can be added to the system after installation for increased on-rail storage.

- User-replaceable/installable parts

- Racks to accommodate 1.5, 2, 10 and 20 mL vials and HiSorb septum plugs

- Other consumables to support each sampling mode on Centri are available

Read more: The sample extraction supplies catalogue

Filters for instruments

Filter disks are used in tube receivers to prevent flow path blockages. Instrument filters should be checked and replaced regularly as part of a routine maintenance plan. Split tubes can be used multiple times, but should be routinely replaced – Markes recommends at least every 12 months. Split filter tubes should never be desorbed.

- User-replaceable

- Common parts for all instrument series

- Refer to instrument manual for guidance, or talk to our technical team

Routine Maintenance Kits

Routine maintenance is essential for all Markes instruments and large sampling accessories. Routine Maintenance Kits (RMKs) contain sufficient spares for approximately 12 months’ use, for an average user, and help ensure your instrument continues to perform to its full potential. Contents include filters, O-rings, ferrules etc.

- Ensures most commonly used spares are available for routine maintenance by the user

- Ensures spares are on-site for on-demand maintenance, maximising system availability

- Available for specific for instruments

Vials & caps

Markes supplies a range of vials and caps to support users undertaking headspace (HS), solid-phase micro-extraction (SPME), thin-film SPME (TF-SPME) and HiSorb sorptive extraction sampling. Vials are available in 1.5, 10 and 20 mL sizes, with crimp-tops or screw-tops. Caps to suit sampling method(s) are provided with the appropriate septum.

- Decapper and crimping tools available for use with crimp-top vials

- 5 mL vials available in clear and amber glass

- Caps for 10/20 mL vials are magnetic, to enable automated handling by the Centri robot

Read more: Sample extraction supplies catalogue

Vac- HeadSpace, SPME, SPME Arrow caps

 Vac- HeadSpace, SPME, SPME Arrow caps (closures) are designed to improve your headspace and SPME analyses. The closures offer a gastight seal to 20 mm crimp top headspace vials with a long neck over a long period of time and during operation. The metallic body of the closure has magnetic properties to allow easy handling by the Centri autosampler, without using additional magnetic caps.

- Easy to use and implement in any routine laboratory

- Reusable caps, reducing laboratory waste and extra costs

- Closures are also ideal for sample storage at atmospheric pressure without losing volatile analytes e.g., during long waiting times on an autosampler tray

Read more: Instruction for use - Vac SPME Fiber-Arrow

Soil probes

VOC-Mole is a stainless steel assembly that is inserted into the ground, allowing soil gas to be sampled onto a sorbent tube, for analysis using thermal desorption (TD). VOC-Mole is constructed from stainless steel drilled with a series of holes through which soil gases can pass.

- Robust and easy to transport

- Compatible with passive and pumped sampling

- Can be left in situ for long periods

Xem thêm

VOC-Mole flyer

VOC-Mole Instruction for use

Radiello

radiello® is a long-established radial diffusive (passive) sampling device for volatile organic compounds (VOCs), used for indoor, outdoor, workplace, and personal monitoring. The diffusive body can be fitted to the supporting plate in either a vertical or horizontal position. Starter kits are available that include both the cartridge and appropriate diffusive body, along with a support plate and adapter, plus a blank cartridge as a shipment blank. 

Read more:

Radiello passive sampling workflow

Radiello instruction for use

POD Sampler

The POD Sampler (POcket Diffusive Sampler) is a radial diffusive sampler for volatile organic compounds (VOCs), compatible with analysis by thermal desorption. Developed in partnership with pioneers in radial sampling at the Joint Research Centre of the European Commission the POD Sampler’s design results in exceptional performance. Compared with axial samplers, radial samplers have a larger diffusive surface area for adsorption and a shorter diffusive pathway.

Xem thêm: POD Sampler flyer

Continuous on-line thermal desorber for environmental monitoring of trace-level organic vapors

TT24-7xr is an advanced, versatile thermal desorption (TD) instrument designed for low-flow monitoring of airborne very volatile and volatile organic compounds (VVOCs and VOCs) with GC-MS.

Optimized for continuous monitoring, TT24-7xr incorporates twin trap technology ensuring complete sample coverage without interruption and enhanced sample throughput. With advanced water management and automated stream selection between sample, standard, and blank, TT24-7xr is the ideal choice for unattended, continuous monitoring of environmental air, material testing chambers, and process gas streams.

Xem thêm: TT24-7xr brochure

Cryogen-free, automated canister and whole-air preconcentration system

UNITY–CIA Advantage-xr™ is an inert, multi-channel system designed for the automated analysis of VOCs in canisters and bags. It features capacity for up to 27 channels, operates completely without cryogen, and is compatible with both on-line and tube-based sampling. It is the ultimate solution for high-throughput laboratories performing canister-based methods such as US EPA TO-15/TO-15A and Chinese EPA HJ 759. It is also ideal for analysts requiring a versatile TD system capable of handling other whole-air samples as well as sorbent tubes.

UNITY–CIA Advantage-xr™ is also available with our award-winning Multi-Gas functionality. The Multi-Gas Enabled version is the only canister and bag thermal desorber independently certified for operation with a choice of three carrier gases: Helium, Nitrogen, and Hydrogen. Hydrogen carrier gas offers fast, cost-effective analysis and protects the laboratory against future Helium shortages.

Read more: UNITY–CIA Advantage-xr brochure

Cryogen-free automated thermal desorption system for unattended on-line air monitoring

UNITY–Air Server-xr™ is an air monitoring system that introduces a controlled flow of sample directly into an integral focusing trap, allowing automated on-line analysis of VVOCs and VOCs in air or gas. It is the ideal solution for 24/7 monitoring of volatiles such as PAMS ozone precursors and odorous species, especially in remote locations where unattended sampling at specific time intervals is necessary.

Xem thêm: UNITY–Air Server-xr brochure

Double sample throughput by simultaneously processing two batches of thermal desorption (TD) tubes

Dual-TD™ is a thermal desorption system designed to maximize sample throughput for dual-channel GC instruments by simultaneously processing two batches of sample tubes.

Featuring two TD100-xr units running in parallel, Dual-TD instantly doubles sample processing productivity. The system also utilizes "overlap mode" to desorb a new pair of samples while the analysis of the previous pair is still underway, completely eliminating GC "idle time." Dual-TD is compatible with any dual-channel GC and is independently certified for operation with Helium, Nitrogen, or Hydrogen carrier gases (Multi-Gas capability).

Dual-TD is the ideal solution for high-throughput laboratories needing to:

- Efficiently carry out large-scale sorbent tube background testing.

- Undertake targeted trace VOCs and SVOCs analysis.

- Measure total VOC analysis at scale.

Read more: Dual-TD product information