By J. C. Van Loon

Written for the working towards analyst, Analytical equipment for Geochemical Exploration deals completely validated chemical research equipment for settling on what base or important metals are in geochemical exploration samples, reminiscent of rocks, soil, or sediment. idea is stored to a minimal and whole approaches are supplied in order that no extra assets are had to behavior analyses

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1 2 . E n e r g y - d i s p e r s i v e instrument: 1 , x - r a y t u b e ; 2 , filter; 3 , s a m p l e ; 4 , Si(Li) detector; 5, liquid nitrogen cryostat. changeable crystals so that an appropriate range of wavelengths can be selected for the analysis at hand. A multichannel instrument is designed so that a n u m b e r of single-channel s p e c t r o m e t e r s can be arranged radially about an x-ray tube and sample. E a c h of the subassemblies has its o w n collimator, analyzing crystal, and d e t e c t o r .

Atomic Absorption Spectrometry 29 are being m e a s u r e d in the p r e s e n c e of a major a m o u n t of sodium, the standards should also contain a large a m o u n t (1000 ppm) of sodium. Physical Interferences T h e viscosity and surface tension of a solution will influence its rate of flow into the nebulizer. This m e a n s that the a t o m populations in the atomizer will differ for the s a m e concentration of e l e m e n t s in solutions of different viscosities. A q u e o u s solutions sometimes contain large concentrations of mineral acids.

A multichannel instrument is designed so that a n u m b e r of single-channel s p e c t r o m e t e r s can be arranged radially about an x-ray tube and sample. E a c h of the subassemblies has its o w n collimator, analyzing crystal, and d e t e c t o r . In this m a n n e r , up to 28 elements in the sample can be measured simultaneously. Most of the channels can be preset for specific analyte lines. In addition, o n e or more channels can be equipped as for scanning and thus are suitable for qualitative w o r k .

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