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Metal-cyanide complexes exist as a natural function of
geology and chemistry. Often times, most individuals are
concerned with total cyanide or weak acid dissociable
cyanide to identify risk assessment. Unfortunately, the
basic analytical methods to supply these measurements do not
provide ample information to make educated decisions.
Metal-cyanide complexes are an inherent function of mining
operations, especially for gold extraction. The released
cyanide will react with naturally occurring compounds
containing metals. The availability of these metals and
other parameters can dictate the mobility, risk assessment,
and identification if remediation efforts are necessary.
Cyanide itself can not be determined using ICP-MS but when
it is complexed with a metal, ICP-MS becomes an excellent
detector considering its sensitivity for metals.
Determination of cyanide complexes of Ag, Au, Cu, Co, Ni,
Fe, and Se at sub-ppb levels is possible when these species
are chromatographically separated and detected by
ICP-DRC-MS. It should be noted that identification of AgCN
and CuCN complexes are typically qualitative due to the weak
dissociable bonds.
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