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Table 3 Standard solution volumes and concentrations
Measured sample
concentration
1 to 2 mg/L
3 to 6 mg/L
7 to 15 mg/L
15 to 30 mg/L
30 to 60 mg/L
3. Measure the concentration of the spiked sample.
4. Calculate the expected (theoretical) concentration of the spiked sample:
C
= (C
x V
/V
) + (C
E
S
S
T
Where:
• C
= expected (theoretical) concentration of the spiked sample
E
• C
= concentration of the sample (mg/L) before the standard solution was added
S
• C
= concentration of the standard solution (mg/L)
SS
• V
= sample volume (mL) before the standard solution was added
S
• V
= volume of the standard solution (mL)
SS
• V
= total volume (standard solution volume (mL) + sample volume)
T
5. Calculate the percent recovery of the standard addition. A percent recovery of 100 (±5)% is an
indication that the sample measurements are accurate.
Percent recovery = C
Where:
• C
= measured concentration of the sample after the addition of the standard solution
M
• C
= expected (theoretical) concentration of the sample after the addition of the standard
E
solution
Section 10 Consumables
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
Description
Nitrate Ionic Strength Adjustor Powder Pillows (buffer only)
Nitrate Ionic Strength Adjustor Powder Pillows (includes
components to remove interferences)
Nitrate Ionic Strength Adjustor Buffer Solution (includes
components to remove interferences)
Nitrate Standard Solution, 1 mg/L NO
Nitrate Standard Solution, 10 mg/L NO
Nitrate Standard Solution, 100 mg/L NO
Nitrate Standard Solution, 1000 mg/L NO
Wash bottle, polyethylene, 500 mL
Disposable wipes, 11 x 22 cm
12 English
Volume of standard to
add
0.5 mL
1.0 mL
0.3 mL
0.5 mL
1.0 mL
x V
/V
)
SS
SS
T
/C
x 100
M
E
—N
3
—N
3
—N
3
—N
3
Concentration of standard solution
100 mg/L NO
100 mg/L NO
1000 mg/L NO
1000 mg/L NO
1000 mg/L NO
Quantity
100/pkg
100/pkg
500 mL
500 mL
500 mL
500 mL
500 mL
1
280/pkg
–
—N
3
–
—N
3
–
—N
3
–
—N
3
–
—N
3
Item no.
2984799
4456369
2488349
204649
30749
194749
1279249
62011
2097000
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