Analytical Notes
58 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide
Solutions containing H
2
SO
4
and HCLO
4
acids may give little or no
signal for any hydride-forming elements. The use of H
2
SO
4
and HClO
4
is to be avoided as these are very strong oxidizing agents.
Sample and standard and blank solutions must be prepared by a
similar method to obtain the lower oxidation state.
Interferences
The measurement of some elements by VGA can be affected by the
presence of other elements or molecules in the sample matrix. These
reduce the amount of element detected by the spectrometer by
adversely affecting the amount of hydride formed.
A list of observed interferences is given in the following table.
Table 1. % Loss of analyte signal due to element interferences
Analyte >50% 10–50% 10%
As Au, Ge, Ni, Pt, Pd, Rh,
Ru
Ag, Bi, Co, Cu, Sb, Se,
Sn, Te
Al, B, Ba, Be, Ca, Cd, Cr, Cs, Fe, Ga, Hf, Hg,
In, Ir, K, La, Li, Mg, Mn, Mo, Na, Pb, Rb,
Re, Si, Sr, Ti, Tl, V, W, Y, Zn, Zr
Bi Ag, Au, Co, Cu, Ni, Pd,
Pt, Rh, Ru, Se, Te
As, Cd, Cr, Fe, Ge, Ir,
Mo, Sb, Sn
Al, B, Ba, Be, Ca, Cs, Ga, Hf, Hg, In, K, La,
Li, Mg, Mn, Na, Pb, Rb, Re, Si, Sr, Ti, Tl, V,
W, Y, Zn, Zr
Ge As, Au, Cd, Co, Fe, Ni,
Pd, Pt, Rh, Ru, Sb, Se,
Sn
Bi, Cu, Ir, Te Ag, Al, B, Ba, Be, Ca, Cr, Cs, Ga, Hf, Hg, In,
K, La, Li, Mg, Mn, Mo, Na, Pb, Rb, Re, Si,
Sr, Ti, Tl, V, W, Y, Zn, Zr
Sb Au, Co, Ge, Ni, Pt, Pd,
Rh, Ru
As, As, Cr, Cu, Re, Se,
Sn
Al, B, Ba, Bi, Ca, Cd, Cs, Fe, Be, Ga, Hf, Hg,
In, Ir, K, La, Li, Mg, Mn, Mo, Na, Pb, Rb, Si,
Sr, Te, Ti, Tl, V, W, Y, Zn, Zr
Se Ag, Cu, Ni, Pd, Pt, Rh,
Ru, Sn
Au, As, Cd, Co, Fe, Ge,
Pb, Sb, Zn
Al, B, Ba, Be, Bi, Ca, Cr, Cs, Ga, Hf, Hg, In,
Ir, K, La, Li, Mg, Mn, Mo, Na, Rb, Re, Si, Sr,
(Te), Ti, Tl, V, W, Y, Zr
Te Ag, Au, Cd, Co, Cu, Fe,
Ge, In, Ni, Pb, Pd, Pt,
Re, Rh, Ru, Se, Sn
As, Bi, Ir, Mo, Sb, Si,
W
Al, B, Ba, Be, Ca, Cr, Cs, Ga, Hf, Hg, K, La,
Li, Mg, Mn, Na, Rb, Sr, Ti, V, Y, Zn, Zr
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