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Rapidly freeze plasma with the new Thermo Scientific™ XBF40D-MD -40°C Blast Freezer—a breakthrough sample preparation device for use prior to cold storage. Your freezer is not a sample preparation device. Ultra-low and laboratory-grade freezers are designed to maintain samples at cold temperatures for long-term storage. They are not designed for and do not have the speed or refrigeration capacity to rapidly freeze plasma and other critical storage. Using the new XBF40D-MD for rapid cooling reduces the stress on your sample storage freezer, and freezes your plasma quickly and efficiently.