Hach Micro Dist Manuel D'utilisation page 10

Explosion hazard. Hot sample can exit the sample tube explosively if foam or debris touches the
membrane during distillation.
Fire hazard. This product is not designed for use with flammable liquids.
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Refer to Troubleshooting
Hazardous gas information
The Micro Dist methods do not typically release hazardous gases, but a hazardous situation can
occur in a fault condition. Refer to
Table 2 Hazardous gas information for specific methods
Method Gas
Cyanide-1 Cyanide (HCN)
Cyanide-2 Cyanide (HCN)
Cyanide-3 (WAD) Cyanide (HCN)
Cyanide-5 Cyanide (HCN)
Phenolics-1 Phenol (C
Sulfide-1 Hydrogen sulfide (H
Sulfide-2 Hydrogen sulfide (H
Ammonia-1 Ammonia (NH
Ammonia-2 Ammonia (NH
Tritium-1 Tritium (
Preparation notes
• The instrument takes approximately 40 minutes to increase to the set temperature.
• For very low-concentration methods, such as ammonia, flush the collector tubes with deionized
water before use.
• Use only ammonia collector tubes with the ammonia Micro Dist methods. Typically, the ammonia
collector tubes contribute an ammonia blank of 0.015 mg or 15 ppb N/L in the 6.0 mL of distillate.
Make sure to distill both calibration standards and all samples with the ammonia tubes.
• Use user-fill tubes the same day they are filled with trapping solution.
• Keep pre-fill tubes sealed in the package until ready to use. Use pre-fill tubes within 2 weeks after
the sealed package is opened. Record the date the package was opened on the package.
• Do not put collector tubes in a refrigerator as cold causes the collector tube membrane to
decrease in size. Trapping solution can then get around the collector tube membrane.
• For the cyanide methods, always distill the standards with the samples.
10 English
W A R N I N G
C A U T I O N
C A U T I O N
on page 22 if foam or debris touches the membrane during distillation.
Table 2 for the gases that can be released from the Micro Dist.
Permissable exposure limit concentration (per mg/m
H OH)
6 5
S)
2
S)
2
)
3
)
3
3
H)
5 mg
5 mg
5 mg
5 mg
19 mg
15 mg
15 mg
35 mg
35 mg
—
3
)