Scott-type chamber

From the sample solution to be analyzed, small droplets are formed by the nebulization of the solution using an appropriate concentric or cross-flow pneumatic nebulizer/spray chamber system. Quite different solution introduction systems have been created for the appropriate generation of an aerosol from a liquid sample and for separation of large size droplets. Such an arrangement provides an efficiency of the analyte introduction in the plasma of 1-3 % only.6 The rest (97 % to 99%) goes down in the drain.7 Beside the conventional Meinhard nebulizer, together with cooled or non-cooled Scott spray chamber or conical spray chamber, several types of micronebulizers together with cyclonic spray chambers are employed for routine measurements in ICP-MS laboratories. The solvent evaporated from each droplet forms a particle which is vaporized into atoms and molecules... 

Spray chamber Scott-type double-pass... 

The elements Al, Mn, and Sr were determined by means of a Perkin-Elmer Optima 4300DV inductively coupled plasma emission spectrometry (ICP-AES) instrument (axial mode), equipped with an AS-90 Plus autosampler, a cross-flow nebulizer, and a Scott-type spray chamber in Ryton. The instrumental operating parameters are listed in Table 10.1. 

Fosinopril sodium Pd 0.1 pg/g Plasma Quad PQ 11 Turbo plus ICP-MS Jacketed Scott Type Spray Chamber [95]... 

An ICP-Q-MS (Varian 820-MS, Darmstadt, Germany) with a concentric nebulizer (MicroMist) and a double-pass Scott-type spray chamber cooled by a Peltier system was used for analysis of Pd. Table 1 details the ICP-Q-MS operating conditions. Maximal intensity was optimized for In" and minimal values for CeOVCe and Ba QBa. For ID calculations three isotope ratios ( ° Pd/ °" Pd, 105pd/106pd, lOSpjj/lOSpj 2). 

Figure 2.18 (a) Concentric nebulizer mounted on a Scott-type double-pass spray chamber. 

A second popular type of spray chamber utilizes a cyclonic design. A diagram of this spray chamber is shown in Figure 5.10. Instead of using two compartments as with the Scott-type spray chambers, this device uses a... 

Figure 4.2 Wash-out experiments of a Hg standard (10 pg/kg) demonstrated for different nebu-liser/spray chamber set-ups Cross Flow neb./Scott-typedouble pass (CFN 1 mlVmln, Perkin Elmer Sciex, Ontario, Canada), low flow Meinhard neb./Scott-type double pass (LFM 200 pl/min, Glass Expansion, Australia/Perkin Elmer Sciex, Ontario, Canada), MicroMist neb./Cinnabar(MMN/CIN 100 pL/min, Glass Expansion, Australia) each set-up was tested with and without addition of Au (100 pg/kg).

A VG PlasmaQuad ICP-MS was used with typical operating conditions and flows. Oxygen (<2%) was used in the nebulizer gas flow in order to minimize the amount of carbon build-up in the MS interface region. A Scott-type double pass spray chamber was cooled to -5°C to minimize the amount of solvent vapor reaching the plasma. 

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