Hach QP 1680-TOC Manual Básico Del Usuario página 10

Chemical
Ultra-pure water (UPW)
Phosphoric acid (H PO
3
Phosphoric acid solution (H
9.33% w/w
Hydrochloric acid (HCl) 36% w/w
Hydrochloric acid solution (HCl) (3 mol/L) 10,4%
w/w
Sulfuric acid (H SO ) 96% w/w
2 4
Sulfuric acid solution (H
w/w
4.3 Remove the transport locks
Personal injury hazard. Instruments or components are heavy. Use assistance to install
or move.
Use the bottom of the analyzer to lift the analyzer. Do not use the plastic covers or the sampler arm
to lift the analyzer or damage to the analyzer can occur.
Remove the magnetic lock and transportation strips from the analyzer. Refer to
steps that follow:
1. Remove the white stirrer lock.
2. Remove the white strip.
3. Remove the red warning strip..
4. Discard the red warning strip
5. Install the white strip again.
3
Concentration of the solution in terms of percentage composition. x% w/w solution equals X
grams of solute dissolved in 100 grams of solution.
10 English
Table 1 Reagents and standards
3
) 85% w/w
4
PO ) (1 mol/L)
3 4
SO ) (1,5 mol/L) 13,5%
2 4
W A R N I N G
N O T I C E
Specification
Electrical conductivity at 25°C: 0.0555 μS/cm
maximum; electrical resistivity at 25°C:
18 MΩ·cm minimum
Note: UPW is used to prepare standards or dillutions. 2.5 L of
UPW is necessary for the analyzer installation.
Used to prepare the 9.33% phosphoric acid
solution (1 mol/L)
Note: The recommended acid solution is phosphoric acid
(H3PO4). As an alternative, other strong acids can be used.
54.9 mL is used to prepare 500 mL of solution.
Used to prepare the 10.4% hydrochloric acid
solution.
144.7 mL is used to prepare 500 mL of solution.
Used to prepare the 13.5% sulfuric acid solution
70.3 mL is used to prepare 500 mL of solution.
Figure 4 and the