ICP-optical emission spectrometer

The chemical compositions of the samples were obtained by ICP in a Varian 715-ES ICP-Optical Emission Spectrometer. Powder X-ray diffraction was performed in a Philips X pert diffractometer using monochromatized CuKa. The crystallinity of the zeolites was obtained from the intensity of the most intense reflection at 23° 20 considering the parent HZ5 sample as 100% crystalline. Textural properties were obtained by nitrogen physisorption at -196°C in a Micromeritics ASAP 2000 equipment. Surface areas were calculated by the B.E.T. approach and the micropore volumes were derived from the corresponding /-plots. Prior to the adsorption measurements the samples were degassed at 400°C and vacuum overnight. 

Fig. 98. ICP-optical emission spectrometer, (a) gas supply, (b) sampler, (c) peristallic pump, (d) nebulizer, (e) nebulization chamber, (f) hf generator, (g) ICP torch, (h) spectral apparatus, data acquisition, data processing.

Fig. 99. Volatilization of dry solution aliquots from a graphite boat evaporation system coupled to a simultaneous ICP optical emission spectrometer at different heating currents [34],...

At the end of the deposition process some of the support material was stuck to the side of the inner SS cup, while most of the powder (-70-95%) was freely tumbling. In order to collect the powder, the inner SS cup was simply removed and inverted onto a piece of weighing paper. The powder stuck to the side remained in the cup and was not used for the subsequent work. Precious metal loading was determined using a Thermo Jarrell Ash IRIS Inductively Coupled Plasma (ICP) Optical Emission Spectrometer using procedures described previously.[l]... 

Fig. 107. ICP-optical emission spectrometer, (a) gas supply (b) sampler (c) peristaltic pump (d) nebulizer ...

The instrument which uses this plasma torch is called an inductively coupled plasma atomic emission spectrometer (ICP-AES) or an inductively coupled plasma optical emission spectrometer (ICP-OES). It is similar to an... 

Induced Coupled Plasma Spectrometry (ICP). An even more sensitive instrument has been developed to detect and quantitate, simultaneously, all inorganic species contained with a sample matrix. One such system is the ICP-OES (optical emission spectrometer) (Figure 25.5). The ICP-OES takes an aliquot of sample that has been acid digested and mixes it with a gas (e.g., argon) forming a plasma (i.e., an ionized gas) that is channeled into a nebulizer. Energy is applied to excite the atoms that are converted by the optics of the instrument into individual wavelengths. The... 

ICP-OES Inductively coupled plasma-optical emission spectrometer... 

A novel technique of atomisation, known as vapour generation via generation of the metal hydride, has been evolved, which has increased the sensitivity and specificity enormously for these elements [5-7]. In these methods the hydride generator is linked to an AAS (flame graphite furnace) or inductively coupled plasma-optical emission spectrometer (ICP-OES) or an inductively coupled plasma mass spectrometer (IPC-MS). Typical detection limits achievable by these techniques range from 3 pg/1 (arsenic) to 0.09 pg/1 (selenium). 

Inductively Coupled Plasma Coupled to Optical Emission or Mass Spectrometry. In the case of ICP-based spectrometric instruments, we have to consider separately the atomisation/excitation/ionisation source from the optical emission spectrometer or from the mass spectrometer system. 

To determine if leaching of platinum occurred during experiments with multiple use of catalyst, analyses for platinum content before and after using a catalyst in a hydrosilylation reaction were performed on an ICP-OES (inductively coupled plasma— optical emission) spectrometer (Vista MPX, Australia). 

In Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), a gaseous, solid (as fine particles), or liquid (as an aerosol) sample is directed into the center of a gaseous plasma. The sample is vaporized, atomized, and partially ionized in the plasma. Atoms and ions are excited and emit light at characteristic wavelengths in the ultraviolet or visible region of the spectrum. The emission line intensities are proportional to the concentration of each element in the sample. A grating spectrometer is used for either simultaneous or sequential multielement analysis. The concentration of each element is determined from measured intensities via calibration with standards. 

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