Choosing a Purge and Trap Autosampler: Common questions

Free and trap autosamplers are frequently used for chromatographic analysis. Unlike other types associated with autosamplers, their purging and trapping mechanism makes them ideal for analyzing compounds that are present in low levels, especially Volatile Organic Compounds (VOCs) In case you are in the market for a purge and snare autosampler, but if you have questions regarding choosing the best equipment, the answers below may help.

Should the machine accommodate both water and soil samples?

Laboratories that use autosamplers to test soil plus liquid samples routinely use versions that accommodate both types of examples. The potential benefits of using the same device for both samples include: less equipment expense, less equipment busy space, and more efficient sample transfer.

What is the best process for avoiding sample carryover?

Different models use different methods for preventing carryover. One of the best strategies is to fill the needle along with bake gas in a trap bake mode while applying a warm water rinse in a fixed volume loop to heat the water in the pathway. This method is used with the Centurion purge and trap autosampler.

Is a front-loading model better than a back-loading design?

Both models have unique advantages. Front-loading purge and trap versions are beneficial for having low carryover and sample consumption, while back-loading models are advantageous for having an effective cleaning function. Most autosamplers have front-loading technology, but hybrid autosamplers that contain both types of technology can also be available.

What IT capabilities should the autosampler offer?

The IT environment from the laboratory defines the IT abilities of its equipment. Today, high-tech laboratories need autosamplers that have network capacity, printing capability, and offer web-based access. Models that contain the Windows XPe platform offer these IT capabilities, among others.

Is it sensible to purchase the pre-owned autosampler?

Buying a pre-owned design is indeed sensible for several reasons. For just one, it is typically priced at least 25 percent less than new equipment. For another, it normally experiences minimal wear. Buying a pre-owned product is also practical when the product’s technology is up to date. Because lightly used lab tools enters the secondary market in a steady rate, finding up-to-date machines are usually not difficult.

What type of seller ought to pre-owned equipment be purchased from?

Pre-owned lab equipment is available from several sources, but it should be purchased from the seller that specializes in inspecting, reconditioning, and reselling used lab devices. Some sellers of new equipment furthermore sell pre-owned equipment. If you need assist deciding whether to buy a new autosampler or an used one, consulting with one of these simple sellers is ideal.


A free and trap autosampler is found in many laboratories that test soil and liquid samples for low-level substances. Although purge and trap autosamplers can perform the same types of analysis, different types have different features. Choosing the right model requires a careful inspection of the machine’s exclusive mechanics, its overall condition, plus an assessment of the seller. For more information on selecting an autosampler, get in touch with a reputable seller of new and utilized laboratory equipment today.

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