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By J. C. Van Loon

Written for the practising analyst, Analytical equipment for Geochemical Exploration bargains completely demonstrated chemical research equipment for making a choice on what base or necessary metals are in geochemical exploration samples, resembling rocks, soil, or sediment. conception is saved to a minimal and entire strategies are supplied in order that no extra assets are had to behavior analyses

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Matrix matching of samples and standards particularly with respect to total dissolved solids and acid concentration is r e c o m m e n d e d as a m e a n s of overcoming these interferences. Element-specific interferences originate in the plasma and involve chemical and atomization effects. Signals can be e n h a n c e d or d e p r e s s e d . Although solutions containing elements such as calcium and p h o s p h a t e , calcium and aluminum, and combinations of alkali metals have been studied by a n u m b e r of r e s e a r c h e r s , conflicting results have been r e p o r t e d .

H o w e v e r , they indicate the magnitude of the effects which may o c c u r in w o r k of a similar kind. 2. Nonspectral Interferences T h e s e interferences arise from physical and chemical p r o c e s s e s that affect the transport, atomization, and excitation of the analyte. T h e y are classified as nonspecific and element-specific. Nonspecific interferences are related to the physical properties of the analyte. In solution w o r k , physical properties of the solution affect the rate of introduction of the sample into the nebulizer and h e n c e the plasma.

Electrodeless discharge lamp. 6. Interferences As in all analytical m e t h o d s , interferences are important considerations because they d e c r e a s e a c c u r a c y and increase detection limits. K n o w l e d g e of the types of interferences which may arise in atomic absorption and how they may be overcome is essential. S o m e metals such as c o p p e r and m a n g a n e s e d o not have serious problems in flame atomic absorption e v e n in the analysis of a range of sample t y p e s .

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