Millipore Spectroquant Multy Operating Manual page 130

Measuring range: 0.10 – 5.00 mg/l Pb
Samples of total hardness 0 –10 °d
Check the total hardness Check the pH of the
of the sample sample, specified range:
pH 3 – 6.
If required, add dilute
ammonia solution or
nitric acid drop by drop
to adjust the pH.
Add to the second cell Insert the blank cell into
5.0 ml of distilled water the cell compartment.
with pipette, close with Align the mark on the
the screw cap, and mix. cell with that on the pho-
(Blank cell) tometer. Press Zero .
Samples of total hardness > 10 °d
Add 1 level grey micro- Shake both cells vigor-
spoon each of Pb-2K to ously to dissolve the
the already measured solid substance.
cells, close with the
screw cap.
Important:
For the determination of total lead a pretreatment
with Crack Set 10C, Cat.No. 114688, or Crack Set 10,
Cat.No. 114687, and thermoreactor is necessary.
Release 08/2014 - Spectroquant
Lead
16-mm cell
Select method 2 6 0 .
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
= Result A
Insert the blank cell into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Zero .
®
Multy
Add 5 drops each of
Pb-1K into two reaction
cells, close with the
screw cap, and mix.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
= Result B
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) we recommended to use
®
Spectroquant CombiCheck 40, Cat.No. 114692.
Ready-for-use lead standard solution Certipur
Cat.No. 119776, concentration 1000 mg/l Pb, can also be
used after diluting accordingly.
To check for sample-dependent effects the use of addition
solutions (e.g. in CombiCheck 40) is highly recommended.
114833
Cell Test
Add to one cell 5.0 ml of
the sample with pipette,
close with the screw cap,
and mix.
Result A
– Result B
= mg/l Pb
®
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