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Appendix B
5/20/2009
8
5.6. Do not wear any jewelry if electrically troubleshooting. Even the low voltage points
are dangerous and can injure is allowed to short circuit.
5.7. The following hazard classifications are listed for the chemicals regularly used in
this procedure.
Chemical
Health
Flammability Reactivity Contact
Storage
Acetanilide
1
1
0
2
Green
Magnesium Perchlorate
1
0
3
2
Yellow
Ascarite
3
0
2
4
White Stripe
Silver vanadate on
Chromosorb
3
0
0
3
White
Silver oxide/Silver tungstate
on Chromosorb
3
0
0
3
White
Silver tungstate/Magnesium
oxide on Chromosorb
3
0
0
3
White
Copper wire
0
0
0
1
Green
On a scale of 0 to 4 the substance is rated on four hazard categories: health, flammability reactivity, and contact. (0
is non-hazardous and 4 is extremely hazardous)
STORAGE
Red - Flammability Hazard. Store in a flammable liquid storage area.
Blue - Health Hazard. Store in a secure poison area.
Yellow - Reactivity Hazard. Keep separate from flammable and combustible materials.
White - Contact Hazard. Store in a corrosion-proof area.
Green - Use general chemical storage (On older labels, this category was orange).
Striped - Incompatible materials of the same color class have striped labels. These
Products should not be stored adjacent to substances with the same color label.
Proper storage must be individually determined.
6.
EQUIPMENT AND SUPPLIES
6.1. An elemental analyzer capable of maintaining a combustion temperature of 975°C
and analyzing particulate and sediment samples for elemental carbon and nitrogen.
The Exeter Model 440 is used in this laboratory.
6.2. A gravity convection drying oven, capable of maintaining 47
o
C ± 2°C for extended
periods of time.
6.3. Muffle furnace, capable of maintaining 875°C +/- 15
o
C.
6.4. Ultra-micro balance that is capable of accurately weighing to 0.1 ug.
6.5. Vacuum pump or source capable of maintaining up to 10 in. Hg of vacuum.
6.6.
Freezer, capable of maintaining -20
o
C± 5°C.
6.7.
25-mm vacuum filter apparatus made up of a glass filter tower, fritted glass disk base
and 2-L vacuum flask.
6.8.
Flat blade forceps.
6.9. Labware - All reusable labware (glass, quartz, polyethylene, PTFE, FEP, etc.) must
be sufficiently clean for the task objectives. Clean glassware by rinsing with
deionized water; soaking for 4 hours or more in 10% (v/v) HCl and then rinsing with
deionized water. Store clean. All traces of organic material must be removed to
prevent carbon and nitrogen contamination.