Forms of Inorganics in. Tropospheric Particles

The discussion thus far has focused on the elemental composition of particles, which can be determined using such techniques as neutron activation or X-ray fluorescence analysis (see Chapter 11). One of the questions of increasing interest is the chemical form in 

FIGURE 9.39 Analysis of particles as a fraction of particle size in the Amazon Basin using factor analysis (adapted from Artaxo and Hansson, 1995). 

TABLE 9.16 Deliquescence Points of Some Salts Commonly Found in Ambient Air at 25°C  

FIGURE 9.40 Calculated changes in particle size as a function of relative humidity at 25°C from particles with four different chemical compositions (adapted from Tang, 1980). 

FIGURE 9.41 Uptake of water by (NH4)S04 and its dlying as a function of relative humidity at 25b3C (adapted from Tang et al., 1995). 

---