Millipore Spectroquant Multy Operating Manual page 141

Measuring range: 0.05 – 5.00 mg/l Ni
Attention: In contrast to the instructions given in the package insert the sample volume as well as the reagent volume
must be doubled.
Check the pH of the Select method 3 1 1 .
sample, specified range:
pH 3 – 8.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Reaction time: Add to each cell 4 drops
1 minute of Ni-2, close with the
Press Enter to start screw cap, and mix.
the countdown.
Reaction time: Insert the blank cell into
2 minutes the cell compartment.
Press Enter to start Align the mark on the
the countdown. cell with that on the pho-
tometer. Press Zero .
Important:
For the determination of total nickel a pretreatment
with Crack Set 10C, Cat.No. 114688, or Crack Set 10,
Cat.No. 114687 and thermoreactor is necessary.
Release 08/2014 - Spectroquant
Nickel
24-mm cell
Pipette 10 ml of the
sample into a 24-mm
cell.
Check the pH, specified
range: pH 10 – 12
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
®
Multy
Pipette 10 ml of distilled
water into a second
24-mm cell.
(Blank cell)
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) we recommended to use
®
Spectroquant CombiCheck 40, Cat.No. 114692.
Use 10 ml R-1 instead of the sample.
A nickel standard solution Titrisol
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.
Use 10 ml sample + 0.2 ml R-2.
114785
Test
Add to each cell 2 drops
of Ni-1, close with the
screw cap, and mix. If the
color disappears, con-
tinue adding drop by drop
until a slight yellow color-
ation persists.
Add to each cell 4 drops
of Ni-3, close with the
screw cap, and mix.
®
, Cat.No. 109989, can