Atomic emission spectroscopy apparatus

Atomic emission spectroscopy apparatus, 77,78-79t,80 procedure, 77,78-79t,80 multielement detection, 75 SIT, 31-56... 

A schematic diagram showing the disposition of these essential components for the different techniques is given in Fig. 21.3. The components included within the frame drawn in broken lines represent the apparatus required for flame emission spectroscopy. For atomic absorption spectroscopy and for atomic fluorescence spectroscopy there is the additional requirement of a resonance line source, In atomic absorption spectroscopy this source is placed in line with the detector, but in atomic fluorescence spectroscopy it is placed in a position at right angles to the detector as shown in the diagram. The essential components of the apparatus required for flame spectrophotometric techniques will be considered in detail in the following sections. 

The titanium contents of the resulting catalyst samples were determined with an inductively coupled plasma-atomic emission spectrometer (ICP-AES) (Kon-tron, Germany Model S-35) after HE acid digestion of the solid. N2 adsorption/ desorption isotherms at 77 K were obtained using a Micromeritics ASAP 2020 apparatus. Catalyst crystalline structure was examined by X-ray diffraction (XRD) on a Shimadzu XRD-6000 diffractometer with Cu Ka radiation. X-ray photoelectron spectroscopy (XPS) data were acquired on a VG Microtech MT-500 spectrometer using A1 Ka X-ray radiation (1,486.6 eV). Fourier transform infrared (FUR) data were obtained on a Shimadzu IR Prestige FUR spectrophotometer. 

The components included within the frame drawn in dotted lines represents the apparatus required for flame emissions spectmscopy. For atomic absorption spectroscopy there is an additional requirement of a resonance line source. 

Suddendorf, R.F., Watts, J.O., and Boyer, K. (1981) Simplified apparatus for determination of mercury by atomic absorption and inductively coupled plasma emission spectroscopy. J. Assoc. Off. Anal. Chem., 64,1105-1110. 

Tin compounds are converted to the corresponding volatile hydride (SnHi, CHj, SnHj, (CH3)2 SnHj and (CH3)3SnH) by reaction with sodium borohydride at pH6.5 followed by separation of the hydrides by gas chromatography and then detection by atomic absorption spectroscopy using a hydrogen-rich hydrogen-air flame emission type detector (Sn-H band). The apparatus used is shown in Figs. 15.9-15.11. 

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