L1 /
2
CH3041
GRAVIMETRY II
• Interference
is a big problem in gravimetry
as there are often many ions that will react
with the reagent in the same fashion as the
analyte. eg. DMG / Ni2+, Pd2+, Pt2+
as there are often many ions that will react
with the reagent in the same fashion as the
analyte. eg. DMG / Ni2+, Pd2+, Pt2+
• Masking agents
are used to prevent the
precipitation of interfering species.
precipitation of interfering species.
• (2)
Gravimetry in Env. Chem. is also used in quantifying Suspended Solids content in water
and PMx in air It is also used in determining
the Total Solids in water.
• In any solids measurement the solid is
dried to constant weight. (typically at 105oC)
dried to constant weight. (typically at 105oC)
