Micro-argon detector

A diagram of the micro argon detector sensor is shown in figure 3. This sensor was designed to have a very small "effective" volume so that it could be used with capillary columns where the flow rate may be as low as 0.1 ml/min or less. In the micro argon detector sensor, the anode is withdrawn into a small cavity about 2.5 mm in diameter. 

The Separation of a Hydrocarbon Mxtnre on a Nylon Capillary Column Using the Micro Argon Detector... 

The triode detector is a modification of the micro argon detector and a diagram of the triode detector sensor is shown in figure 5. 

The Simple or Macro Argon Detector Sensor The Micro Argon Detector The Triode Detector The Thermal Argon Detector The Helium Detector The Pulsed Helium Discharge Detector The Electron Capture Detector The Pulsed Discharge Electron Capture Detector References Chapter 7... 

One of the earliest efforts of qualitative measurement of a protein (human serum albumin) in a microchip-based device was based on bead agglutination in a microchamber (approximately lOjaL). Subsequently, several quantitative immunoassays have been performed using microchip electrophoretic systems that permit separation and quantitation of free- and bound-labeled antigens in competitive assays (see Chapter 5). Most are carried out in channels micro-machined into fused silica substrates. Early work on quantitative assays achieved measurement of cortisol in serum.The assay used cortisol labeled with fluorescein and an argon laser detector at 488 nm and required only 80 pL of a 40x dilution of serum as the sample. Other capillary electrophoresis-based assays for a variety of antibodies have also been developed that include immunoglobulins (IgG, IgA, and IgM), antibovine serum albumin, and antiestradiol. ... 

Detector MS, Micromass Quatro Micro LC triple quadrupole, electrospray interface, positive ion mode, capillary voltage 3.5 kV, source 100°, desolvation 150°, nebulizing gas nitrogen at 365 L/h, collision gas argon at 3.5 jrbar, cone 40 V, collision energy 38.0 eV, m/z 612.40-100.10 (The make-up liquid was EtOHilO mM ammonium acetate 95 5 pumped at 0.25 mL/min, which mixed with the column effluent. A splitter was used so that 0.2 mL/min entered the detector.)... 

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