Nafion membrane desolvation

Fig. 52. Aerosol drying by using a single tube Nafion membrane desolvation stage. (Reprinted with permission from Ref. [148].)...

The addition of oxygen was found to be helpful when nebulizing effluents from HPLC containing organic eluents such as acetonitrile. This was useful when using ICP-MS for on-line detection in speciation as well as in trace-matrix separations. Here, however, it is useful to use desolvation, even in the case of low consumption, high efficiency nebulizers, such as the HEN or DIHEN. This can be done efficiently with membrane desolvation using Nafion membranes [148]. 

Yang J., Conver T. S., Koropchak J. A. and Leighty D. A. (1996) Use of a multi-tube Nafion membrane dryer for desolvation with thermospray sample introduction to inductively coupled plasma-atomic emission spectrometry, Spectrochim Acta, Part B 51 1491-1504. 

Microflow nebulizer with heated spray chamber and Peltier-cooled condenser An example of this design is the Apex inlet system from ESI. This unit includes a microflow nebulizer, heated cyclonic spray chamber (up to 140°C), and a Peltier multipass condenser/cooler (down to -5°C). A number of different spray chamber and nebulizer options and materials are available, depending on the application requirements. Also, the system is available with Teflon or Nafion microporous membrane desolvation, depending on the types of samples being analyzed. Figure 17.12 shows a schematic of the Apex sample inlet system with the ctoss-Aow nebulizer. 

Nebulizer with membrane desolvation (tubular microporous Teflon membranes polyimide fibers Nafion tubes)... 

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