Spectroquant Pharo 300 - Page 396

Pipette 2.5 ml of the
sample into a test tube
with screw cap.
Add 2 drops of SO
4
-1
and mix.
Add 1 level green micro-
spoon of SO
4
-2, close
the test tube with the
screw cap, and mix.
Temper the test tube in a
water bath at 40 °C for 5
minutes.
Add 2.5 ml of SO
4
-3 with
pipette and mix.
Sulfate
114791
Test
Filter the content of the
test tube with a round fil-
ter into another test tube
with screw cap.
Add 4 drops of SO
4
-4
to the filtrate, close the
test tube with the screw
cap, and mix.
Temper the test tube
again in the water bath
for 7 minutes.
Select method with
AutoSelector.
Place the cell into the
cell compartment
.
Measuring 25 – 300 mg/l SO
4
10-mm cell
range: Expression of results also possible in mmol/l.
Transfer the solution into
a cell.
Check the pH of the
sample, specified range
:
pH 2– 10.
If required, add dilute
sodium hydroxide
solution or hydrochloric
acid drop by drop to
adjust the pH.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) w
e recommended to use
Spectroquant
®
CombiCheck 10, Cat.No. 114676, or the
Standard solution for photometric applications, CRM,
Cat.No. 125050 and 125051.
Ready-for-use sulfate standard solution Certipur
®
,
Cat.No. 119813, concentration 1000 mg/l SO
4
2–
, can also
be used after diluting accordingly.
To check for sample-dependent effects the use of addition
solutions (e.g. in CombiCheck 10) is highly recommended.