PrimeLab 1.0 Multitest Manual De Usuario página 110

Copper
(19)
10 ml
24 mm
Continued...
Note(s)
-> For the analysis of total copper the following procedure is necessary:
- Add concentrated sulfuric acid to the test sample (1 ml per 100 ml of test
sample). By boiling it for 10 minutes everything is dissolved. Now cool the
test sample. Then add ammonia and bring the sample to a pH value of 3 – 5.
The initial volume of 100 ml of fluid have to be filled up with deionized water.
The analysis can now be performed as described with 10 ml of the liquid
obtained.
- With organic compounds pretreated water may need to be oxidized
(destruction of the copper complexes). Add concentrated sulfuric acid and
concentrated nitric acid to the test sample (1 ml per 100ml each). Now cool
the test sample. The analysis can now be performed as described.
-> For the analysis the water has to have a pH value of 4 - 6. Strongly acidic
water having a pH value of <2 should be neutralized with 8 mol per litre
potassium hydroxide KOH.
-> Not yet completely dissolved powder has no effect on the accuracy of the
measurement.
-> Disorders:
- Cyanide CN: To ensure full color development, the test sample had to be
enriched with 0.2 ml of formaldehyde and wait 4 minutes. The analysis can
now be performed as described. The test result must be multiplied by 1.02.
- Silver Ag +: Silver can cause blackening of the test sample. Add saturated
potassium (10 drops per 75 ml). Then the test sample had to be poured
through a fine filter. The analysis is now carried out as described with 10 ml
of the filtered liquid.
77
0 - 5 mg/l
Name on device: 19-Copper-pow
(Cu)
PL Copper 1
Powder
(PLpow20Cu1)
77