商品資訊 - 瀚盟科技股份有限公司

商品名稱:Sorbent tube accessories
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	Brass caps	For long-term storage (or transport) of conditioned or sampled tubes, two-piece metal storage caps fitted with one-piece PTFE ferrules (¼-inch or 6 mm i.d.) must be used. Storage caps – For method-compliant storage These caps are recommended by international standard methods such as US EPA Method TO-17, ASTM D6196 and EN ISO 16017, and have been validated for storage of sampled/blank tubes for up to 27 months. The caps meet a stringent cleanliness specification and tight manufacturing tolerances. For tubes fitted with TubeTAG, an extended ‘TubeTAG-ready’ long-term storage cap must be used on the tagged end of the tube.
	Aluminium push-on caps	Aluminium push-on caps with O-ring seals are convenient for short-term storage of cleaned or sampled ¼-inch tubes – for example, when they are being analysed almost immediately after sampling. *Note that push-on caps should not be used for long-term storage or transport of tubes.
	Diffusion caps	The diffusion cap replaces the storage cap at the sampling (grooved) end of the TD sample tube for the duration of the exposure/monitoring period. The storage cap at the other end of the tube is left in place.Diffusion caps are usually made of clean, anodised aluminium. However, we can also supply stainless steel versions for use in more corrosive atmospheres if required.For traceability purposes, diffusion caps can also be supplied etched with a unique serial number.
	DiffLok caps	Tubes on all Markes’ TD autosamplers are sealed with unique DiffLok™ caps, which simply push onto both ends of every tube. DiffLok caps use Markes’ patented diffusion-locking technology (also used in SafeLok tubes), to preserve sample integrity by preventing both analyte loss and artefact ingress. DiffLok caps ensure that even volatile analytes are successfully retained, guaranteeing reproducible results for standards at the beginning and end of multi-tube sequences. DiffLok caps maintain sample integrity throughout the analytical sequence DiffLok caps remain on the tubes throughout an analytical sequence. This preserves sample and tube integrity before and after desorption, but at the same time also simplifies the automatic TD process, thus optimising uptime and productivity. DiffLok caps have been field-proven to seal sampled and blank tubes much more effectively than alternative PTFE push-on caps incorporating PTFE-coated O-rings. DiffLok caps are available for ¼-inch and 6 mm o.d. tubes, and in stainless steel or inert-coated stainless steel. Inert-coated caps are only ever required for the sampling/desorption end of the tube when sampling reactive compounds. Replacement O-rings are also available for routine maintenance of the caps.
	TubeMate tool	TubeMate is used to insert (and remove) the gauze-retaining spring in metal tubes. Once the spring is partially inserted into the end of the tube, TubeMate grips the spring and enables it to be twisted into place with very little effort. Reversing this process aids the removal of the springs when unpacking old tubes. The other end of the TubeMate tool can also be used to push the rear sorbent-retaining gauze down onto the sorbent surface.
	Penclips	Penclips attach to the groove on 3½-inch metal tubes so that they can be easily fastened to a lapel or pocket for personal monitoring.
	Gauze-retaining springs	Gauze-retaining springs are used in metal tubes to ensure the rear sorbent-retaining gauze remains positioned correctly on top of the sorbent bed. Springs can be inserted and removed from the tubes using Markes’ TubeMate™ tool.
	CapLok™ tool	Long-term storage caps must be correctly tightened in order to ensure a leaktight seal. Caps are recommended to be tightened ‘finger-tight plus quarter turn’. Although this is possible with conventional spanners/wrenches, using two spanners can be awkward, and can lead to incorrect positioning of caps and other errors – for example, over-tightening of the caps may cause distortion of the PTFE ferrules and a leak in the seal. In extreme cases it is even possible to break the ends of glass tubes or deform the ends of steel tubes. Markes’ CapLok tool overcomes all these issues. It was designed by scientists at INERIS (l'Institut National de l'Environnement Industriel et des Risques, France) specifically to simplify tube capping/uncapping procedures and minimise the risk of errors. The CapLok tool is manufactured exclusively by Markes International.
	Sorbent-retaining gauzes	Markes' sorbent-retaining gauzes are manufactured to precise tolerances to ensure that they correctly fit the front groove of metal (stainless steel or inert-coated stainless steel) tubes. The placement of the front gauze is critical for diffusive sampling, as it defines the diffusion gap. All Markes’ 3½-inch metal tubes are supplied with this critical front gauze correctly and firmly fitted. Gauzes can also be used to separate sorbent beds in metal multi-sorbent tubes. For inert-coated tubes, gauzes in contact with the sample stream are also inert-coated.
	Tube shipment boxes	Markes International provides two types of lightweight, robust cardboard storage boxes for convenient shipment of 3½″ steel or glass sorbent tubes: For 10 unconditioned & uncapped tubes. For 10 conditioned & capped tubes.
	Springs for glass tubes	Torsion springs are used in glass tubes to ensure that the rear plug of quartz wool remains positioned correctly on top of the sorbent bed. They can also be used during direct desorption of materials to secure the sample in place centrally in the heated zone of the tube.
	PTFE tube inserts	If direct desorption in an empty tube could cause irreversible contamination of that tube, its best to place the sample in a disposable tube liner. Markes’ direct desorption liners are made from PTFE and designed for use with stainless steel tubes. They protect the tube walls and simplify sample weighing. Two types of liners are available: Snug-fit liners, which should be used for most powdered/granular samples. Loose-fit liners, suitable for semi-solid samples (which should be smeared around the inside of the liner).
	Tube connection unions	Standard ¼-inch o.d. tubes can be connected in series using ¼-inch–¼-inch stainless steel unions fitted with the same one-piece PTFE ferrules used in ¼-inch storage caps. After sampling, the tubes are disconnected, capped and stored individually prior to analysis. Linking sorbent tubes in series allows the use of sorbent combinations that cannot be packed into a single tube. It also completely eliminates the risk of higher-boiling analytes migrating to the stronger sorbents during sample storage.

For every TD application, our range of tube accessories are designed to make your life easier – from tools to assist with routine tube maintenance and storage, to labour-saving tube inserts for direct desorption.

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DiffLok caps maintain sample integrity throughout the analytical sequence