Markes International has made labeling easier for field and laboratory staff. As well as the usual unique serial number in alphanumeric format, the new tube labeling system now includes a copy of the serial number in barcode format and an arrow indicating the sampling flow direction to minimize errors in the field. All aspects of the enhanced labels are applied directly onto each sorbent tube using a laser etching process on stainless steel (and inert-coated steel) tubes or via ceramic decals on glass tubes. The heat-resistant labeling offers greater reliability throughout multiple monitoring and analysis cycles. Selected for long-term readability, the code 128 serial number barcode reduces errors when recording and tracking tubes, and eliminates time-consuming manual data entry. It can be applied to new or existing tubes and is particularly useful for large-scale monitoring studies and labs with significant sorbent tube stock. Offering barcoded serial numbers as standard complements the company’s proprietary tube labeling options including TubeTAG, which uses radio frequency identification technology. TubeTAG enables tube and sample information to be stored and tracked with individual sorbent tubes, facilitating tube quality assurance. Key applications include monitoring the history of individual tubes throughout their life or tracking an individual thermal desorption sample throughout a sequence of re-collection and repeat analyses. Other tube labeling options include custom etching or banding of tubes for at-a-glance recognition of tube type—batch, application/project or particular sorbent combination. The company also provides a comprehensive range of industry-standard thermal desorption tubes available in glass, stainless steel and inert-coated stainless steel, as well as a range of sorbent options. Additional tube-related options include SafeLok tubes for monitoring ultra-trace or high toxic compounds, and larger DAAMS (Depot Area Air Monitoring System) tubes for specific civil defense applications.