Undercounter Chromatography Column and Sample Storage Refrigerator

What is the Undercounter Chromatography Column and Sample Storage Refrigerator?

A compact 2–8 °C cabinet for HPLC and GC columns, vials, standards and mobile-phase additives, placed beneath or beside the chromatograph. It keeps consumables close to the instrument, protects stored columns and avoids repeated trips to a shared refrigerator.

Overview

Chromatography laboratories keep many small items at 2–8 °C, including columns stored in the correct solvent, prepared standards and autosampler vials awaiting analysis. This undercounter cabinet of 100–200 L has drawers and shelves sized for vial racks, column boxes and 100 mL bottles. A lockable glass or solid door limits access to controlled standards. Forced-air circulation maintains uniform temperature to limit evaporation of volatile solvents from vials, and a stable set point improves repeatability of samples waiting in queue. Because solvents may be present, users should avoid placing open flammable liquids inside an ordinary refrigerator. For that purpose, the flammable-storage or explosion-proof variants described under that category are the appropriate choice.

How does it work?

A chromatography refrigerator uses a vapour-compression circuit and forced-air circulation, like any laboratory refrigerator, but the cabinet is configured around the workflow. Cold-cabinet versions include a work shelf, cable ports, internal sockets and lighting so that FPLC pumps, detectors and collectors operate inside at 4 °C. The controller holds the set point, usually within ±1 K, with airflow directed to avoid blowing across columns. Storage versions emphasise drawers, racks and locks for columns and standards. Light-protected versions use opaque doors and amber lighting, and variable-temperature versions add a heater and programmable profiles. The thermal design must handle door openings and the heat load of instruments inside the cabinet.

What are the key features?

• Drawers and shelves sized for vial racks and column boxes
• Forced-air circulation limits solvent evaporation from stored vials
• Lockable door to control access to standards and samples
• Undercounter height fits below chromatography benches
• High and low temperature alarm with door-ajar warning

What are the technical specifications?

A typical undercounter chromatography column and sample storage refrigerator configuration offers temperature range of 2–8 °C, net volume of 100–200 L, temperature uniformity of ≤ 3 K, cooling method of Forced-air circulation, refrigerant of R600a and drawers of 2–4 sliding, removable. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Undercounter Chromatography Column and Sample Storage Refrigerator is used in HPLC column storage, autosampler vial holding, analytical standard storage and GC consumable storage. Across the wider Chromatography Refrigerators class, laboratories also deploy it for protein purification at 4 °C, HPLC column storage and reference-standard storage.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-011, IEC 61326-1, ICH Q2(R2), NFPA 45, NFPA 30 and ISO 9001. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place the cabinet on a level floor with the ventilation clearance stated in the manual, and size the electrical supply for the cabinet plus any instruments plugged into internal sockets. Allow the interior to reach set point before loading instruments. Condensation forms on cold surfaces when the door is open, so provide a drain or drip tray and keep electrical connections dry. Calibrate probes at least yearly, clean the condenser regularly, and check gaskets. For regulated work, document temperature mapping and record temperature so that run conditions can be shown in method records.

How do I select the right Undercounter Chromatography Column and Sample Storage Refrigerator?

Select the undercounter refrigerator when consumables need cold storage near the instrument. Specify volume, drawer layout, door type and height under the bench. Never use it for open flammable solvents, for which you should specify a flammable-storage or explosion-proof cabinet instead, in line with site fire-safety rules.

How does it compare with other Chromatography Refrigerators variants?

Decide first whether the cabinet will run instruments or only store consumables. For instruments, specify internal dimensions, total heat load, cable ports, sockets and door type, and choose a large cabinet for several systems. For consumables, an undercounter model with drawers is enough. Choose a light-protected model for photosensitive standards and a variable-temperature model for methods with multiple temperatures. Compare temperature uniformity, noise, condensation control and alarms. Confirm ambient range, power supply and floor loading. Never place open flammable solvents in a standard unit, and choose a flammable-storage or explosion-proof model where solvents are stored.