c) Use the TenSette Pipet to add 0.1 mL, 0.2 mL and 0.3 mL
of standard, respectively, to the three mixing cylinders.
Stopper and mix each thoroughly.
d) Analyze each sample as described in the procedure.
The manganese concentration should increase 0.1 mg/L
for each 0.1 mL of standard added.
e) If these increases do not occur, see Standard Additions in
Section 1 for more information.
Note: An alternative to the above procedure is to pipet 10.0 mL of
sample into dry sample cells before performing standard additions. A
volumetric pipet or a TenSette Pipet can be used to deliver the sample
volume.
Standard Solution Method
Prepare a 0.5 mg/L manganese standard solution as follows:
a) Pipet 5.00 mL of Manganese Standard Solution, 1000 mg/
L Mn, into a 1000-mL volumetric flask.
b) Dilute to the mark with deionized water. Prepare this
solution daily.
c) Pipet 10.00 mL of the solution from Step b into a 100-mL
volumetric flask.
d) Dilute to the mark with deionized water. This second
dilution is equivalent to 0.5 mg/L Mn.
c) Use the TenSette Pipet to add 0.1 mL, 0.2 mL and 0.3 mLof standard, respectively, to the three mixing cylinders.Stopper and mix each thoroughly.d) Analyze each sample as described in the procedure.The manganese concentration should increase 0.1 mg/Lfor each 0.1 mL of standard added.e) If these increases do not occur, see Standard Additions inSection 1 for more information.Note: An alternative to the above procedure is to pipet 10.0 mL ofsample into dry sample cells before performing standard additions. Avolumetric pipet or a TenSette Pipet can be used to deliver the samplevolume.Standard Solution MethodPrepare a 0.5 mg/L manganese standard solution as follows:a) Pipet 5.00 mL of Manganese Standard Solution, 1000 mg/L Mn, into a 1000-mL volumetric flask.b) Dilute to the mark with deionized water. Prepare thissolution daily.c) Pipet 10.00 mL of the solution from Step b into a 100-mLvolumetric flask.d) Dilute to the mark with deionized water. This seconddilution is equivalent to 0.5 mg/L Mn.
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