Chromatography Consumables, Analytical Services and Chromatography / Mass Spectrometry Training from Crawford Scientific

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		UV-Vis     Cells and supplies are critical to the performance of your Agilent 8453 UV-Visible Spectroscopy System. That’s why Agilent is constantly working to deliver products that are proven through stringent testing to meet the highest standards, thereby ensuring that your system will operate at optimum levels. We also work to expand our range of cells, to make certain that Agilent remains your definitive supply source.   Cells and Cell Accessories Cells Standard cells are rectangular cells with standardized exterior dimensions. The cells either have an open top or a fused cover that can be sealed with a PTFE stopper. Some of the cells with open tops are delivered with fitted lids. Macro Cells The macro cell that is defined by DIN 58963 as a rectangular cell with an inner width greater than 5 mm, has emerged as the standard for photometry. The most widely used macro cell is a rectangular cell with outer dimensions of 45 x 12.5 mm (height x width). The length of the cell is dependent on the desired path length. Semi-Micro Cells Semi-micro and micro cells have an inner width of 4 mm to 2 mm. The thickness of the base is 9 mm. All semi-micro and micro cells are for use with spectrophotometers having a beam height of 15 mm. Ultra-Micro Cells These cells are specifically designed for use in the µL range (down to 50 µL). These cells fit into any standard cell holder and have the advantage of requiring much smaller sample volumes than standard cells. The cells are constructed so that filling and emptying can be easily accomplished with commonly available pipette tips. Ultra-micro cells with Eppendorf pipette filling/emptying are designed to handle extremely small volumes. When only a minimum amount of sample is available, these cells provide a filling volume only slightly larger than the measuring chamber volume. Cylindrical Cells A cylindrical cell is a cell with plane-parallel optical surfaces whose inner volume is cylindrical in shape and has a longitudinal axis parallel to the direction of the radiation beam. Flow-Through Cells Until recently, flow-through cells had measuring chambers that were either rectangular or circular in shape. These shapes were dictated by limitations in the manufacturing process, and did not offer the best geometry for clean flushing and reduction of contamination. Now Agilent has developed new oval aperture cells that combine low volume with excellent flow characteristics. These oval flow cells are strongly recommended for automated analyses such as dissolution testing. Black quartz is used in the vicinity of the aperture to ensure that no light passes through the sidewalls of the cell.   For more information contact us
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