Direct Detect® Assay-free Cards

50 Membrane cards used for protein quantitation in the Direct Detect® Infrared Spectrometer.

Pricing and availability is not currently available.

Quality Level

mfr. no.

Direct Detect®


protein quantification: suitable

shipped in


General description

Quantity Options:
DDAC00010-GR = 50 Cards
DDAC00010-4P = 200 Cards
DDAC00010-8P = 400 Cards

The Direct Detect Assay-free Cards are desgined for use in the the Direct Detect Spectrometer. The card contains four hydrophilic polytetrafluoroethylene (PTFE) membrane positions sized for easy sample application and surrounded by a hydrophobic ring to retain analyzed sample within the IR beam. A 2 μL sample volume is recommended in order to assure proper sample application, drying, and measurement.

The Assay-free card can be inserted into the system and analyzed immediately after preparation. The Direct Detect spectrometer has a built in drying system that will automatically dry the sample to the point where it will give an accurate reading.
The Direct Detect Assay-free card is intended for a one-time protein application, however, already prepared cards can be stored and reread later.

Legal Information

DIRECT DETECT is a registered trademark of Merck KGaA, Darmstadt, Germany
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Learn how total protein quantitation with an infrared spectrometer may be a more accurate and universal alternative to Bradford, BCA, or UV-based methods.
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