DIRECTIONS FOR USING 24/40 DISTILLATION APPARATUS, NC-11663 WARNING: For use by adults with knowledge of general safety procedures. Always wear proper eye and hand protection when handling glass labware and heat!

SAFETY FIRST Other items needed (not supplied in kit)... This apparatus uses a heat source (optionally • Heat source such as alcohol, Bunsen, or gas available) to heat the contents of the Boiling Flask. burner. Use caution when handling to prevent burns! • Two pieces of flexible tubing to connect a water Protect eyes and skin from hot gasses and broken supply to the Graham . or chipped glassware. Be sure all components are properly set up ASSEMBLY (Refer to Figure 1). This apparatus is an open Assemble the Lab Support Stand by attaching system so pressure is relieved at the drip end of the support rod to the metal base. Then open wide the condenser. (Make sure you leave a small gap the jaws of the clamp and loosely attach it to the between the drip tip and the receiving flask.) support rod. Material may crystallize in the condenser, which, over time, could block steam causing a dangerous Assemble the tripod base by screwing the three build up of pressure and possible explosion. When legs into the . Place the finished with distillation, allow system to cool, then Square and the Boiling Flask on top of the iron drain the condenser of cooling water. Always work ring. with clean glassware. Next, place the Kjeldahl Distilling Column in the Use caution when handling glassware, top of the Boiling Flask, and attach the Graham especially when cleaning. Pad your sink with a Condenser to the short end of the distilling column. towel or rubber mat to help prevent accidental Adjust the clamp on the lab stand rod so as to breakage. support the condenser at the proper angle. (See Figure 2.) Ground glass joints can sometimes become stuck together. Use silicone vacuum grease Attach the Drip Tip Adapter to the end of the (optionally available) to prevent “frozen” joints. condenser and place the drip end loosely into the Erlenmeyer receiving flask. Refer to Figure 1 for proper placement of clamps KIT CONTAINS (See Figure 1.) and glassware. Do not force glassware to fit. Adjust Borosilicate (Heat Tempered) Glassware: angle and height of clamps until glass joints seat 1. Boiling Flask, 500mL – 24/40 ground glass joint. properly. 2. Kjeldahl Distilling Column – with 50mm Finally, attach one length of optional rubber hose diameter bulb. to the bottom inlet of the condenser. This is the 3. Graham Condenser, 250mm – 24/40 ground water supply inlet. Attach the other hose to the top glass joint. inlet of the Condenser. This is the water outlet 4. Drip Tip Adapter – 24/40 ground glass joints. port. Cooling water can be supplied from a nearby 5. , 500mL – for receiving. sink (requires a user-supplied faucet adapter) or a Hardware: water bucket with submersible pump (also user- 6. Iron lab support stand with clamp. supplied). 7. Iron tripod. Never let the Boiling Flask run dry. Do not leave 8. Wire gauze square. a running system unattended for long.

The Science Company® 95 Lincoln, Denver, Colorado 80203, USA / PHONE 800-372-6726 / FAX 30 3•777-3331 www.sciencecompany.com The Science Company® 95 Lincoln, Denver, Colorado 80203, USA / PHONE 800-372-6726 / FAX 30 3•777-3331 www.sciencecompany.com