Synthesis and Characterization of High-Purity Ultrafine Platinum Particles by Chemical Refining Method

Table 1

Element analysis of the as-synthesized platinum powder.

Elements	Raw platinum	As-precipitated (NH4)2PtCl6	As-synthesized platinum
Main (wt%)
Pt	<99.9	43.95	>99.999
Impurity (ppm)
Na	180.1	1.1	1.9
K	45.3	<1	<1
Ca	238.2	1.7	2.6
Al	110.3	<1	<1
Mg	155.5	<1	<1
Fe	281.3	1.2	1.8
Si	143.2	1.3	1.9
Cr	23.6	<1	<1
Cu	122.5	<1	<1