IV-3
Calibration
Thermo Scientific Orion 2111LL Sodium Monitor User Guide
ROSS and the COIL tradedress are trademarks of Thermo Fisher Scientific Inc. US Patent 6,793,787
The .Thermo .Scientific .Orion .2111LL .sodium .monitor .software .has .default .
values .to .accommodate .0 .1 .mL .additions .of .Orion .standard .1 .and .standard .
2 .and .flow .cell .volume .of .190 .mL . . .
The .operator .has .the .option .to .use .alternate .standards .by .changing, .in .
Setup .mode .the . .flow .cell .volume, .the .standard .1 .and .standard .2 .values .and .
the .volumes .to .be .used .
Let .
V
C
. . = . .Flow .cell .volume . .
Fixed: .190 .0 .mL .
.
C
1
. . = . .Standard .1 .concentration . .
Default: .19 .1 .ppm .
.
C
2
. . = . .Standard .2 .concentration . .
Default: .192 .ppm .
.
V
1
. . = . .Volume .of .standard .1 .added . .
Default: .0 .1 .mL .
.
V
2
. . = . .Volume .of .standard .2 .added . .
Default: .0 .1 .mL .
.
dC
1
. .= . .Concentration .change .due .to .the .first .addition .
.
dC
2
. .= . .Concentration .change .due .to .the .second .addition .
. . . .
dC
1
. .= . .C
1
.x .V
1
./ .(V
1
.+ .V
C
)
. . . .
dC
2
. .= . .C
2
.x .V
2
./ .(V
1
.+ .V
2
.+ .V
C
)
• . dC
1
.should .be .at .least .twice .the .normal .concentration .in .the .sample
• . dC
2
.should .be .about .ten .times .of .dC
1
. .dC
1
.should .not .be .less .than . .
10 .ppb . .
Calibration At Custom
Concentrations Using DKA
For maximum accuracy
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