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DART Direct Analysis in Real-Time

DART produces protonated molecular ions from organic molecules on, or close to a surface. DART operates in atmospheric conditions and requires minimum sample preparation and no specialist reagents. A gas supply is all that is necessary. After fitting the DART to a mass spectrometer, spectra are produced within seconds with minimum operator training.

DART was invented by Cody and Laramee at JEOL Inc in the USA. It uses metastable helium atoms to ionise the sample. Because it is a very soft ionisation process, only protonated molecular ions are formed with no fragmentation, so interpretation is simplified. Identification and structures can be confirmed using either exact mass measurement or MSMS.

The DART source

DART source

DART Features

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The simplest sampling procedure. Just hold the sample in front of the gas stream and acquire spectra

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No sample preparation is necessary. Solids, liquids and vapours can be analysed as seen

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No reagents or solvents are required. The only variable is the temperature of the gas stream. Once the correct temperature is achieved, spectra are produced instantaneously.

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Because there are no reagents, there are no background ions so everything detected originates in the sample

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DART can be fitted to an extensive range of mass spectrometers including ion-traps from Thermo-Finnigan, Agilent and Bruker and an extensive range of triple quadrupoles including ABI

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New!! Automated Operation Click here for more information on the AutoDART.

To date, DART has been used successfully to solve many real problems extremely rapidly.

Applications Include

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Competitive Analysis

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PAT

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QC of active ingredients

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Rapid Analysis of LC Fractions

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Forensics

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Polymers & Packaging

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Odour Investigations

Because DART is still a novel technique, new applications are discovered continually. A catalogue of these can be found on www.ionsense.com Below are a few examples

Spectrum from a blood droplet on a capillary tube

DART blood

DART in Forensics. A comparison of normal carpet burning and carpet soaked in diesel accelerant

DART Carpet

 

For further details on any of these products contact KR Analytical.

 

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