Sievers TOC 820 - Page 181

Ionics Instruments 2004 Page 9-23 DLM 30007-08 Rev. A
Calculation of New TC Calibration Constant (if applicable)
Initial TC Calibration Constant
A
verage TC value from last three runs
New TC
CALIB.
CONST.
Initial TC
CALIB.
CONST.
Standard TOC Conc. + Blank Average
(
)
*
=
(
)
New TC Calibration Constant
IC Calibration Constant
Measured TC Reading (Average)
To pass, the CV value for the measured TC of the IC Standard must be within ±3%.
F Pass F Fail
IC Reading (Average)
% difference = 100*(Average TC - Average IC) / Average TC
To pass, the calculated % difference between TC and IC for the IC Standard
must be within ± 3%.
F Pass F Fail
Calculation of New IC Calibration Constant (if applicable)
Standard Deviation
a
set in
Measurements
of
N
umber
Average
Result
of Sum
=
=
=
∑
=
n
ξ
x
1
2
)(
Deviation Standard
−
∑
−
=
n
xx
100 x
Average
Deviation Standard
(RSD)Deviation Standard Relative =
Relative Standard Deviation (CV)