Labconco RapidStill II, Руководство пользователя

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Standard Operating Procedure
(1) Turn on the cooling water, allowing it to flow through the
condenser. The flow rate will be regulated to 1 gallon per minute
(3.8 liters per minute).
(2)
Depress the ‘Boiler Water’ switch. Looking through the Boiler
viewing slot, fill the boiler approximately 2/3 full, or to the top
line of the flask. If the boiler fills too slowly, slightly increase the
flow rate of the cooling water supply. If the Optional Water Inlet
Kit is installed and the boiler fills too slowly, increase the pressure
or flow rate of the purified water supply. When the proper water
level is obtained, release the switch.
(3)
Turn the ‘Boiler Heater’ switch to the ‘ON’ position. After
approximately 10 minutes, or when the water in the boiler is at a
steady boil, the unit is ready for operation.
(4) Place the digestion tube with a digested sample in the RapidStill
II, giving the tube a slight twist to assure a complete seal.
(5) Place a receiver flask under the Distillate Outlet Tube. Make sure
that the outlet tube is fully submerged.
(6) Add NaOH solution to the digestions tube by depressing the
‘NaOH Addition’ switch. For each 5 ml of concentrated sulfuric
acid used in the digestion process, add approximately 15 ml of
50% NaOH solution to make the distillation solution strongly
alkaline. Use the graduated decal on the front panel of the
RapidStill II as an approximate gauge of the volume in the
digestion tube.
(7) Turn the distillation Time switch to the desired time setting. Be
sure to allow enough time for the distillation solution to reach
boiling.