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Collision/Reaction Cell to Remove<br />
MMatrix-Based t i B d SSpectral t l Interferences<br />
I t f<br />
(ppb)<br />
Apparent A Cr552<br />
Concentrattion<br />
in Blank<br />
20<br />
15<br />
10<br />
5<br />
0<br />
Page 8<br />
Cr52<br />
ClO/ClOH<br />
(mass 52)<br />
overlap in<br />
HCl matrix t i<br />
AC( ArC (mass<br />
52) overlap<br />
in acetic acid<br />
matrix<br />
ArC and ClO<br />
overlaps in<br />
combined<br />
matrix<br />
01% 0.1% 5% 5% HCl 1% 1% 200 200ppm 200 200ppm 500 500ppm Mi Mixed d<br />
HNO3 HNO3 H2SO4 AcOH Na Ca P Matrix<br />
Matrix Blank<br />
Ad Advantage t of f Collision/ C lli i /<br />
Reaction Cell <strong>ICP</strong>-<strong>MS</strong><br />
• Provides removal of<br />
spectral overlaps –<br />
allows accurate trace<br />
element analysis in<br />
variable high-matrix high matrix<br />
H2 samples<br />
He • Example shows the<br />
NoGas removal of ClO ClO, ArC<br />
interferences in various<br />
matrix blanks<br />
• He collision mode gives<br />
reliable removal of all<br />
polyatomic interferences<br />
regardless of the sample<br />
matrix composition<br />
ESAC April 2008
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