Special cases: refractory materials, volatile elements and ultratraces

Elemental digestion before analysis

Figure 1 - Laminar or turbulent fluid flow

Figure 2 - Schematic representation of the heterogeneity and homogeneity of the constitution and distribution of the elements making up a batch.

Figure 3 - Representativeness of fractions in a batch

Figure 4 - Heating block and hot plate

Figure 5 - Mineralization bombs (doc. Parr Instrument Company)

Figure 6 - Mineralizing with microwave energy

Figure 7 - Carius Tube solution protocol according to S.B. Shirey and R. Walker [3].

Figure 8 - Regal water pressure vs. temperature curve

Figure 9 - HPA furnace

Figure 10 - Heating geological samples in HPA furnaces

Figure 11 - Variation of measured concentration with temperature, reagents and oxidation time

Figure 12 - Modified HPA autoclave

Figure 13 - SRC microwave digestion technology according to T. Michel&#039;s protocol [7] (doc. Milestrone)

Figure 14 - Example of power evolution as a function of temperature and pressure in the furnace enclosure

Figure 15 - Sr and Os isotopic compositions in natural samples and spikes