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Copper
Method Performance
Copper
Page 4 of 6
4. Touch
to accept the default values for standard concentration, sample
OK
volume, and spike volumes. Touch
are accepted, the unspiked sample reading will appear in the top row. See
Standard Additions in the instrument manual for more information.
5. Fill eight sample cells with 10 mL of sample. Use the TenSette
0.1 mL of Copper Standard Solution, 4000-µg/L Cu, to two of the sample
cells. Then pipet 0.2 mL of the standard solution into two more cells. Finally,
pipet 0.3 mL of the standard solution into two more cells.
6. Analyze each standard addition sample as described in the procedure above,
using one of the two spiked samples in each set as the blank. Accept each
standard additions reading by touching
reading should reflect approximately 100% recovery.
7. After completing the sequence, touch
the standard additions data points, accounting for matrix interferences. Touch
, then select
View: Fit
the sample spikes and the "Ideal Line" of 100% recovery.
See Section 3.2.2 Standard Additions on page 32 for more information.
Standard Solutions Method
1. To assure the accuracy of the test, prepare a 150-µg/L copper standard by
pipetting 15.00 mL of Copper Standard Solution, 10.0-mg/L Cu, into a
1000-mL volumetric flask.
2. Dilute to the mark with copper-free, reagent-grade water. Prepare this
solution daily. Perform the copper procedure as described above.
3. To adjust the calibration curve using the reading obtained with the 150-µg/L
standard solution, touch
.
Standard Adjust
4. Touch
. Touch
On
Adjust
concentration is used, touch the number in the box to enter the actual
concentration, then touch
See Section 3.2.4 Adjusting the Standard Curve on page 40 for more information.
Precision
Standard: 50 µg/L Cu
Program
145
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
Portion of Curve
Entire range
See Section 3.4.5 Sensitivity on page 44 for more information.
to change these values. After values
Edit
Read
Graph
and touch
Ideal Line
OK
on the current program menu. Touch
Options
to accept the displayed concentration. If an alternate
. Touch
.
OK
Adjust
95% Confidence Limits of Distribution
45–55 µg/L Cu
∆Abs
0.010
®
Pipet to add
. The copper concentration
to view the best-fit line through
to view the relationship between
∆Concentration
2 µg/L Cu
Copper_PP_Low_POR_Eng_Ody.fm
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