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  • 50 Years, and Counting, for Gas-Phase Chromatography
    in 1952 for predicting the gas phase could be used in chromatography. Martin had since invented the gas density balance, the essential apparatus for estimating components in GC. Under Martin, McNair packed columns and evaluated some 80 liquid phases for various chemicals, and fetched coffee
  • Measuring trace ionic impurities in ultrapure acids and bases with ion chromatography (Third in a series)
    application to samples having highly concentrated ionic matrices had been limited until the introduction of moderate-capacity ion-exchange columns. These resins, packed in a smaller- diameter column (2 mm versus the conventional 4 mm), offer high background suppression capability when using
  • Critical Leak Requirements in GC/MS, LC/MS and Analytical Instruments (.pdf)
    for chromatography consists of an injection port at one end of a metal column packed with substrate material and a detector at the other end. A carrier gas propels the sample down the column while flow meters and pressure gauges in the instrument maintain a constant flow.
  • New ideas reshape solid modeling
    appropriate nuts and washers. The software lets users customize the feature to industry norms and company preferences. In the last 24 months, developers of solid-modeling systems have packed more productivity features and technology into their software, making them increasingly powerful design tools
  • 2002 Mercury Mountaineer
    To test the prowess of the 2002 Mercury Mountaineer, my boyfriend Pat and I packed it up and headed for the hills of West Virginia. To test the prowess of the , my boyfriend Pat and I packed it up and headed for the hills of West Virginia. The Mountaineer handled the challenging mountain roads
  • Tilt the modules and shrink the fans, says thermal software
    The whole point of simulation software is to test ideas on the fringe. Even tightly packed control rooms show sufficient cooling for each cabinet. The Honeywell Experion R300 system has over 30 process-control I/O and controller modules stacked in columns. Stacking modules at an 18 tilt directs
  • SMB Takes On Paclitaxel Purification
    studies led to modifications in the amount of stationary phase packed in the SMB columns, along with solvent composition, loading concentration, feed and take-off rates. The SMB process is controlled through real-time, near-line, fast HPLC analysis of the extract and raffinate evaporate streams
  • Eliminating compliance in servosystems
    is shorter. Modern servocontrollers are packed with increasingly more computing power, so it is easy to forget the importance of the dynamic requirements of the mechanical structures. Although the servocontroller is certainly a critical component of the motion-control system, the mechanical

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