Nickel
Nickel
Page 4 of 6
Nickel_PP_Other_PAN_Eng_Ody.fm
4. Snap the neck off a Nickel Voluette
®
Ampule Standard, 50-mg/L Ni.
5. Prepare three sample spikes. Fill three Mixing Cylinders (Cat. No. 1896-40)
with 25 mL of sample. Use the TenSette
®
Pipet to add 0.1 mL, 0.2 mL, and
0.3 mL of standard, respectively, to each sample and mix thoroughly.
6. Transfer 10 mL of each solution into a 10-mL sample cell and analyze as
described in the procedure. Accept each standard additions reading by
touching
Read. Each addition should reflect approximately 100% recovery.
7. After completing the sequence, touch
Graph to view the best-fit line through
the standard additions data points, accounting for matrix interferences. Touch
View: Fit, then select Ideal Line and touch OK to view the relationship between
the sample spikes and the “Ideal Line” of 100% recovery.
See Section 3.2.2 Standard Additions on page 32 for more information.
Standard Solution Method
1. Prepare a 5.00-mg/L Nickel stock solution by pipetting 5.00 mL of Nickel
Standard Solution, 1000-mg/L as Ni, into a 1-L volumetric flask. Dilute to
the mark with deionized water. Prepare this solution daily.
2. Prepare a 0.5-mg/L Ni working solution by pipetting 10.0 mL of the 5.00-mg/
L nickel stock solution into a 100-mL volumetric flask. Dilute to the mark with
deionized water. Prepare this solution daily. Perform the nickel procedure as
described above.
3. To adjust the calibration curve using the reading obtained with the 0.5-mg/L
working solution, touch
Options on the current program menu. Touch
Standard Adjust.
4. Touch
On. Touch Adjust to accept the displayed concentration. If an alternate
concentration is used, touch the number in the box to enter the actual
concentration, then touch
OK. Touch Adjust.
See Section 3.2.4 Adjusting the Standard Curve on page 40 for more information.
Method Performance
Precision
Standard: 0.500 mg/L Ni
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
See Section 3.4.5 Sensitivity on page 44 for more information.
Program 95% Confidence Limits of Distribution
340 0.492–0.508 mg/L Ni
Portion of Curve ∆Abs ∆Concentration
Entire range 0.010 0.007 mg/L Ni
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