The flux fusion process is an effective and simple method for preparing powdered sample substances for XRF, ICP and AA analysis. The method is based on the dissolution of a sample in conjunction with an appropriate fluxing ingredient at an appropriate temperature. For direct XRF analysis, the molten mixture is cast into glass-like beads or further processed for ICP or AA solution analysis. The most effective fluxing agents are lithium borates as represented by Chemplex® Spectrocertified® Pre-Fused FusionFlux® Formulations.
Attributes of Pre-Fused FusionFlux® Formulations
High Density: reduces exceeding the volumetric capacity of crucibles to maintain sample-to-fusion flux ratio recipes and avert the potential possibility of spill over.
High Purity: reduces the introduction of potentially influential foreign element contamination by selectively controlling the starting material purity and the pre-fusion process.
Low Melting Point: assures the dissolution process at effective temperatures but safely below temperatures of constituent elements considered sensitive to volatility loss.
Low LOI: eliminates time consuming accounting for loss on ignition; typically less than 0.03% loss on ignition.
Anhydrous: reduces water content and eliminates the conventional procedure of drying prior to use.
Homogeneity: ensures compositionally similar constituent particles for homogeneous melts.
Granulation: promotes uniform particle size, configuration and distribution by minimizing the introduction of "dust" particles to insignificant levels of concern; typically contain less than 0.05% particles less than 100 microns.
Diversified Mixtures: offers the flexibility of selecting from assorted mixtures of different melting points to reduce eutectic melting temperatures of samples and controlling volatile element evolvement.
Free-Flowing: facilitates handling manually or with automatic dispensing devices.
Non-wetting agents: (NWA) help reduce the surface tension of the sample solution and make it less prone to sticking to the platinuim ware. Each sample does not require alot of non-wetting agents and Chemplex® FusionFlux® formulations are available with the preset concentrations of the Non-wetting agent. It is hightly recommened to use non-wetting agents to lengthen the platinum ware life.